D25030.1740324916.diff
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	diff --git a/externals/jsonlint/src/Seld/JsonLint/JsonParser.php b/externals/jsonlint/src/Seld/JsonLint/JsonParser.php
	--- a/externals/jsonlint/src/Seld/JsonLint/JsonParser.php
	+++ b/externals/jsonlint/src/Seld/JsonLint/JsonParser.php
	@@ -193,13 +193,13 @@
	}

	$message = null;
	- if (in_array("'STRING'", $expected) && in_array(substr($this->lexer->match, 0, 1), array('"', "'"))) {
	+ if (in_array("'STRING'", $expected) && in_array(@substr($this->lexer->match, 0, 1), array('"', "'"))) {
	$message = "Invalid string";
	- if ("'" === substr($this->lexer->match, 0, 1)) {
	+ if ("'" === @substr($this->lexer->match, 0, 1)) {
	$message .= ", it appears you used single quotes instead of double quotes";
	- } elseif (preg_match('{".+?(\\\\[^"bfnrt/\\\\u])}', $this->lexer->getUpcomingInput(), $match)) {
	+ } elseif (@preg_match('{".+?(\\\\[^"bfnrt/\\\\u])}', $this->lexer->getUpcomingInput(), $match)) {
	$message .= ", it appears you have an unescaped backslash at: ".$match[1];
	- } elseif (preg_match('{"(?:[^"]+\|\\\\")*$}m', $this->lexer->getUpcomingInput())) {
	+ } elseif (@preg_match('{"(?:[^"]+\|\\\\")*$}m', $this->lexer->getUpcomingInput())) {
	$message .= ", it appears you forgot to terminate the string, or attempted to write a multiline string which is invalid";
	}
	}
	@@ -213,7 +213,7 @@
	$errStr .= implode(', ', $expected);
	}

	- if (',' === substr(trim($this->lexer->getPastInput()), -1)) {
	+ if (',' === @substr(trim($this->lexer->getPastInput()), -1)) {
	$errStr .= " - It appears you have an extra trailing comma";
	}

	@@ -342,10 +342,10 @@
	$yyval->token = $yytext;
	break;
	case 2:
	- if (strpos($yytext, 'e') !== false \|\| strpos($yytext, 'E') !== false) {
	+ if (@strpos($yytext, 'e') !== false \|\| @strpos($yytext, 'E') !== false) {
	$yyval->token = floatval($yytext);
	} else {
	- $yyval->token = strpos($yytext, '.') === false ? intval($yytext) : floatval($yytext);
	+ $yyval->token = @strpos($yytext, '.') === false ? intval($yytext) : floatval($yytext);
	}
	break;
	case 3:
	@@ -451,7 +451,7 @@
	case '\/':
	return "/";
	default:
	- return html_entity_decode('&#x'.ltrim(substr($match[0], 2), '0').';', 0, 'UTF-8');
	+ return html_entity_decode('&#x'.ltrim(@substr($match[0], 2), '0').';', 0, 'UTF-8');
	}
	}

	@@ -481,7 +481,7 @@
	// UTF-8 ByteOrderMark sequence
	$bom = "\xEF\xBB\xBF";

	- if (substr($input, 0, 3) === $bom) {
	+ if (@substr($input, 0, 3) === $bom) {
	$this->parseError("BOM detected, make sure your input does not include a Unicode Byte-Order-Mark", array());
	}
	}
	diff --git a/externals/jsonlint/src/Seld/JsonLint/Lexer.php b/externals/jsonlint/src/Seld/JsonLint/Lexer.php
	--- a/externals/jsonlint/src/Seld/JsonLint/Lexer.php
	+++ b/externals/jsonlint/src/Seld/JsonLint/Lexer.php
	@@ -79,26 +79,26 @@
	public function showPosition()
	{
	$pre = str_replace("\n", '', $this->getPastInput());
	- $c = str_repeat('-', max(0, strlen($pre) - 1)); // new Array(pre.length + 1).join("-");
	+ $c = str_repeat('-', max(0, @strlen($pre) - 1)); // new Array(pre.length + 1).join("-");

	return $pre . str_replace("\n", '', $this->getUpcomingInput()) . "\n" . $c . "^";
	}

	public function getPastInput()
	{
	- $past = substr($this->matched, 0, strlen($this->matched) - strlen($this->match));
	+ $past = @substr($this->matched, 0, @strlen($this->matched) - @strlen($this->match));

	- return (strlen($past) > 20 ? '...' : '') . substr($past, -20);
	+ return (@strlen($past) > 20 ? '...' : '') . @substr($past, -20);
	}

	public function getUpcomingInput()
	{
	$next = $this->match;
	- if (strlen($next) < 20) {
	- $next .= substr($this->input, 0, 20 - strlen($next));
	+ if (@strlen($next) < 20) {
	+ $next .= @substr($this->input, 0, 20 - @strlen($next));
	}

	- return substr($next, 0, 20) . (strlen($next) > 20 ? '...' : '');
	+ return @substr($next, 0, 20) . (@strlen($next) > 20 ? '...' : '');
	}

	protected function parseError($str, $hash)
	@@ -129,7 +129,7 @@
	$rulesLen = count($rules);

	for ($i=0; $i < $rulesLen; $i++) {
	- if (preg_match($this->rules[$rules[$i]], $this->input, $match)) {
	+ if (@preg_match($this->rules[$rules[$i]], $this->input, $match)) {
	preg_match_all('/\n.*/', $match[0], $lines);
	$lines = $lines[0];
	if ($lines) {
	@@ -140,13 +140,13 @@
	'first_line' => $this->yylloc['last_line'],
	'last_line' => $this->yylineno+1,
	'first_column' => $this->yylloc['last_column'],
	- 'last_column' => $lines ? strlen($lines[count($lines) - 1]) - 1 : $this->yylloc['last_column'] + strlen($match[0]),
	+ 'last_column' => $lines ? @strlen($lines[count($lines) - 1]) - 1 : $this->yylloc['last_column'] + @strlen($match[0]),
	);
	$this->yytext .= $match[0];
	$this->match .= $match[0];
	- $this->yyleng = strlen($this->yytext);
	+ $this->yyleng = @strlen($this->yytext);
	$this->more = false;
	- $this->input = substr($this->input, strlen($match[0]));
	+ $this->input = @substr($this->input, @strlen($match[0]));
	$this->matched .= $match[0];
	$token = $this->performAction($rules[$i], $this->conditionStack[count($this->conditionStack)-1]);
	if ($token) {
	@@ -185,7 +185,7 @@
	return 6;
	break;
	case 2:
	- $this->yytext = substr($this->yytext, 1, $this->yyleng-2);
	+ $this->yytext = @substr($this->yytext, 1, $this->yyleng-2);

	return 4;
	case 3:
	diff --git a/scripts/arcanist.php b/scripts/arcanist.php
	--- a/scripts/arcanist.php
	+++ b/scripts/arcanist.php
	@@ -210,7 +210,7 @@
	$user_config = $configuration_manager->readUserConfigurationFile();
	$config = new ArcanistConfiguration();

	- $command = strtolower($args[0]);
	+ $command = @strtolower($args[0]);
	$args = array_slice($args, 1);
	$workflow = $config->selectWorkflow(
	$command,
	@@ -519,7 +519,7 @@
	phpinfo(INFO_GENERAL);
	$info = ob_get_clean();
	$matches = null;
	- if (preg_match('/^Configure Command =>\s(.?)$/m', $info, $matches)) {
	+ if (@preg_match('/^Configure Command =>\s(.?)$/m', $info, $matches)) {
	$config = $matches[1];
	}
	}
	@@ -527,7 +527,7 @@
	$generic = true;
	list($what, $which) = $resolution;

	- if ($what == 'flag' && strpos($config, $which) !== false) {
	+ if ($what == 'flag' && @strpos($config, $which) !== false) {
	$show_config = true;
	$generic = false;
	$problems[] =
	diff --git a/src/browse/query/ArcanistBrowseObjectNameURIHardpointQuery.php b/src/browse/query/ArcanistBrowseObjectNameURIHardpointQuery.php
	--- a/src/browse/query/ArcanistBrowseObjectNameURIHardpointQuery.php
	+++ b/src/browse/query/ArcanistBrowseObjectNameURIHardpointQuery.php
	@@ -15,7 +15,7 @@
	$token_set = array();
	foreach ($refs as $key => $ref) {
	$token = $ref->getToken();
	- if (!strlen($token)) {
	+ if (!@strlen($token)) {
	continue;
	}

	@@ -42,7 +42,7 @@
	}

	$uri = idx($object, 'uri');
	- if (!strlen($uri)) {
	+ if (!@strlen($uri)) {
	continue;
	}

	diff --git a/src/browse/query/ArcanistBrowsePathURIHardpointQuery.php b/src/browse/query/ArcanistBrowsePathURIHardpointQuery.php
	--- a/src/browse/query/ArcanistBrowsePathURIHardpointQuery.php
	+++ b/src/browse/query/ArcanistBrowsePathURIHardpointQuery.php
	@@ -35,7 +35,7 @@
	}

	$lines = null;
	- $parts = explode(':', $path);
	+ $parts = @explode(':', $path);
	if (count($parts) > 1) {
	$lines = array_pop($parts);
	}
	diff --git a/src/browse/workflow/ArcanistBrowseWorkflow.php b/src/browse/workflow/ArcanistBrowseWorkflow.php
	--- a/src/browse/workflow/ArcanistBrowseWorkflow.php
	+++ b/src/browse/workflow/ArcanistBrowseWorkflow.php
	@@ -142,7 +142,7 @@
	if ($many_hits) {
	foreach ($many_hits as $ref) {
	$token = $ref->getToken();
	- if (strlen($token)) {
	+ if (@strlen($token)) {
	$message = pht('Argument "%s" is ambiguous.', $token);
	} else {
	$message = pht('Default behavior is ambiguous.');
	@@ -167,7 +167,7 @@

	foreach ($many_hits as $ref) {
	$token_display = $ref->getToken();
	- if (!strlen($token)) {
	+ if (!@strlen($token)) {
	$token_display = pht('<default>');
	}

	diff --git a/src/channel/PhutilChannel.php b/src/channel/PhutilChannel.php
	--- a/src/channel/PhutilChannel.php
	+++ b/src/channel/PhutilChannel.php
	@@ -212,17 +212,17 @@
	public function update() {
	$maximum_read = PHP_INT_MAX;
	if ($this->readBufferSize !== null) {
	- $maximum_read = ($this->readBufferSize - strlen($this->ibuf));
	+ $maximum_read = ($this->readBufferSize - @strlen($this->ibuf));
	}

	while ($maximum_read > 0) {
	$in = $this->readBytes($maximum_read);
	- if (!strlen($in)) {
	+ if (!@strlen($in)) {
	// Reading is blocked for now.
	break;
	}
	$this->ibuf .= $in;
	- $maximum_read -= strlen($in);
	+ $maximum_read -= @strlen($in);
	}

	while ($this->obuf->getByteLength()) {
	@@ -379,7 +379,7 @@
	* @task impl
	*/
	public function isReadBufferEmpty() {
	- return (strlen($this->ibuf) == 0);
	+ return (@strlen($this->ibuf) == 0);
	}


	diff --git a/src/channel/PhutilExecChannel.php b/src/channel/PhutilExecChannel.php
	--- a/src/channel/PhutilExecChannel.php
	+++ b/src/channel/PhutilExecChannel.php
	@@ -92,7 +92,7 @@
	list($stdout, $stderr) = $this->future->read();
	$this->future->discardBuffers();

	- if (strlen($stderr)) {
	+ if (@strlen($stderr)) {
	if ($this->stderrHandler) {
	call_user_func($this->stderrHandler, $this, $stderr);
	} else {
	diff --git a/src/channel/PhutilJSONProtocolChannel.php b/src/channel/PhutilJSONProtocolChannel.php
	--- a/src/channel/PhutilJSONProtocolChannel.php
	+++ b/src/channel/PhutilJSONProtocolChannel.php
	@@ -55,7 +55,7 @@

	$len = sprintf(
	'%0'.self::SIZE_LENGTH.'.'.self::SIZE_LENGTH.'d',
	- strlen($message));
	+ @strlen($message));
	return "{$len}{$message}";
	}

	@@ -70,15 +70,15 @@
	$this->buf .= $data;

	$objects = array();
	- while (strlen($this->buf) >= $this->byteLengthOfNextChunk) {
	+ while (@strlen($this->buf) >= $this->byteLengthOfNextChunk) {
	switch ($this->mode) {
	case self::MODE_LENGTH:
	- $len = substr($this->buf, 0, self::SIZE_LENGTH);
	- $this->buf = substr($this->buf, self::SIZE_LENGTH);
	+ $len = @substr($this->buf, 0, self::SIZE_LENGTH);
	+ $this->buf = @substr($this->buf, self::SIZE_LENGTH);

	- if (!preg_match('/^\d+\z/', $len)) {
	+ if (!@preg_match('/^\d+\z/', $len)) {
	$full_buffer = $len.$this->buf;
	- $full_length = strlen($full_buffer);
	+ $full_length = @strlen($full_buffer);

	throw new Exception(
	pht(
	@@ -88,15 +88,15 @@
	new PhutilNumber(self::SIZE_LENGTH),
	phutil_encode_log($len),
	new PhutilNumber($full_length),
	- phutil_encode_log(substr($len.$this->buf, 0, 128))));
	+ phutil_encode_log(@substr($len.$this->buf, 0, 128))));
	}

	$this->mode = self::MODE_OBJECT;
	$this->byteLengthOfNextChunk = (int)$len;
	break;
	case self::MODE_OBJECT:
	- $data = substr($this->buf, 0, $this->byteLengthOfNextChunk);
	- $this->buf = substr($this->buf, $this->byteLengthOfNextChunk);
	+ $data = @substr($this->buf, 0, $this->byteLengthOfNextChunk);
	+ $this->buf = @substr($this->buf, $this->byteLengthOfNextChunk);

	try {
	$objects[] = phutil_json_decode($data);
	diff --git a/src/channel/PhutilLogFileChannel.php b/src/channel/PhutilLogFileChannel.php
	--- a/src/channel/PhutilLogFileChannel.php
	+++ b/src/channel/PhutilLogFileChannel.php
	@@ -17,7 +17,7 @@
	public function read() {
	$buffer = parent::read();

	- if (strlen($buffer)) {
	+ if (@strlen($buffer)) {
	$this->log('>>> '.phutil_loggable_string($buffer));
	}

	@@ -25,7 +25,7 @@
	}

	public function write($message) {
	- if (strlen($message)) {
	+ if (@strlen($message)) {
	$this->log('<<< '.phutil_loggable_string($message));
	}

	diff --git a/src/channel/PhutilMetricsChannel.php b/src/channel/PhutilMetricsChannel.php
	--- a/src/channel/PhutilMetricsChannel.php
	+++ b/src/channel/PhutilMetricsChannel.php
	@@ -69,7 +69,7 @@
	*/
	public function read() {
	$buffer = parent::read();
	- $this->bytesRead += strlen($buffer);
	+ $this->bytesRead += @strlen($buffer);
	return $buffer;
	}

	@@ -78,7 +78,7 @@
	* @task impl
	*/
	public function write($message) {
	- $this->bytesWritten += strlen($message);
	+ $this->bytesWritten += @strlen($message);
	return parent::write($message);
	}

	diff --git a/src/channel/PhutilPHPObjectProtocolChannel.php b/src/channel/PhutilPHPObjectProtocolChannel.php
	--- a/src/channel/PhutilPHPObjectProtocolChannel.php
	+++ b/src/channel/PhutilPHPObjectProtocolChannel.php
	@@ -44,7 +44,7 @@
	*/
	protected function encodeMessage($message) {
	$message = serialize($message);
	- $len = pack('N', strlen($message));
	+ $len = pack('N', @strlen($message));
	return "{$len}{$message}";
	}

	@@ -58,18 +58,18 @@
	$this->buf .= $data;

	$objects = array();
	- while (strlen($this->buf) >= $this->byteLengthOfNextChunk) {
	+ while (@strlen($this->buf) >= $this->byteLengthOfNextChunk) {
	switch ($this->mode) {
	case self::MODE_LENGTH:
	- $len = substr($this->buf, 0, self::SIZE_LENGTH);
	- $this->buf = substr($this->buf, self::SIZE_LENGTH);
	+ $len = @substr($this->buf, 0, self::SIZE_LENGTH);
	+ $this->buf = @substr($this->buf, self::SIZE_LENGTH);

	$this->mode = self::MODE_OBJECT;
	$this->byteLengthOfNextChunk = head(unpack('N', $len));
	break;
	case self::MODE_OBJECT:
	- $data = substr($this->buf, 0, $this->byteLengthOfNextChunk);
	- $this->buf = substr($this->buf, $this->byteLengthOfNextChunk);
	+ $data = @substr($this->buf, 0, $this->byteLengthOfNextChunk);
	+ $this->buf = @substr($this->buf, $this->byteLengthOfNextChunk);

	$obj = @unserialize($data);
	if ($obj === false) {
	diff --git a/src/channel/PhutilProtocolChannel.php b/src/channel/PhutilProtocolChannel.php
	--- a/src/channel/PhutilProtocolChannel.php
	+++ b/src/channel/PhutilProtocolChannel.php
	@@ -28,7 +28,7 @@
	public function read() {
	$data = parent::read();

	- if (strlen($data)) {
	+ if (@strlen($data)) {
	$messages = $this->decodeStream($data);
	foreach ($messages as $message) {
	$this->addMessage($message);
	diff --git a/src/channel/__tests__/PhutilChannelTestCase.php b/src/channel/__tests__/PhutilChannelTestCase.php
	--- a/src/channel/__tests__/PhutilChannelTestCase.php
	+++ b/src/channel/__tests__/PhutilChannelTestCase.php
	@@ -15,7 +15,7 @@
	$x->update();
	$y->update();
	$read = $y->read();
	- if (strlen($read)) {
	+ if (@strlen($read)) {
	break;
	}
	}
	@@ -33,7 +33,7 @@
	$x->update();
	$y->update();
	$read = $y->read();
	- if (strlen($read)) {
	+ if (@strlen($read)) {
	break;
	}
	}
	diff --git a/src/conduit/ConduitClient.php b/src/conduit/ConduitClient.php
	--- a/src/conduit/ConduitClient.php
	+++ b/src/conduit/ConduitClient.php
	@@ -25,7 +25,7 @@

	public function __construct($uri) {
	$this->uri = new PhutilURI($uri);
	- if (!strlen($this->uri->getDomain())) {
	+ if (!@strlen($this->uri->getDomain())) {
	throw new Exception(
	pht("Conduit URI '%s' must include a valid host.", $uri));
	}
	@@ -285,7 +285,7 @@
	}

	$public_key = idx($meta, 'auth.key');
	- if (!strlen($public_key)) {
	+ if (!@strlen($public_key)) {
	throw new Exception(
	pht(
	'Unable to verify request signature, no "%s" present in '.
	@@ -294,7 +294,7 @@
	}

	$signature = idx($meta, 'auth.signature');
	- if (!strlen($signature)) {
	+ if (!@strlen($signature)) {
	throw new Exception(
	pht(
	'Unable to verify request signature, no "%s" present '.
	@@ -303,13 +303,13 @@
	}

	$prefix = self::SIGNATURE_CONSIGN_1;
	- if (strncmp($signature, $prefix, strlen($prefix)) !== 0) {
	+ if (strncmp($signature, $prefix, @strlen($prefix)) !== 0) {
	throw new Exception(
	pht(
	'Unable to verify request signature, signature format is not '.
	'known.'));
	}
	- $signature = substr($signature, strlen($prefix));
	+ $signature = @substr($signature, @strlen($prefix));

	$input = self::encodeRequestDataForSignature(
	$method,
	@@ -336,7 +336,7 @@
	'Request signature verification failed: signature is not correct.'));
	} else {
	// Some kind of error.
	- if (strlen($err)) {
	+ if (@strlen($err)) {
	throw new Exception(
	pht(
	'OpenSSL encountered an error verifying the request signature: %s',
	@@ -389,12 +389,12 @@
	}
	} else if (is_string($data)) {
	$out[] = 'S';
	- $out[] = strlen($data);
	+ $out[] = @strlen($data);
	$out[] = ':';
	$out[] = $data;
	} else if (is_int($data)) {
	$out[] = 'I';
	- $out[] = strlen((string)$data);
	+ $out[] = @strlen((string)$data);
	$out[] = ':';
	$out[] = (string)$data;
	} else if (is_null($data)) {
	diff --git a/src/conduit/ConduitFuture.php b/src/conduit/ConduitFuture.php
	--- a/src/conduit/ConduitFuture.php
	+++ b/src/conduit/ConduitFuture.php
	@@ -34,7 +34,7 @@
	foreach ($headers as $header) {
	list($name, $value) = $header;
	if (!strcasecmp($name, 'X-Conduit-Capabilities')) {
	- $capabilities = explode(' ', $value);
	+ $capabilities = @explode(' ', $value);
	break;
	}
	}
	@@ -46,8 +46,8 @@
	$raw = $body;

	$shield = 'for(;;);';
	- if (!strncmp($raw, $shield, strlen($shield))) {
	- $raw = substr($raw, strlen($shield));
	+ if (!strncmp($raw, $shield, @strlen($shield))) {
	+ $raw = @substr($raw, @strlen($shield));
	}

	$data = null;
	diff --git a/src/config/ArcanistConfigurationEngine.php b/src/config/ArcanistConfigurationEngine.php
	--- a/src/config/ArcanistConfigurationEngine.php
	+++ b/src/config/ArcanistConfigurationEngine.php
	@@ -194,7 +194,7 @@
	$key));
	}

	- $is_ok = preg_match('(^[a-z][a-z0-9._-]{2,}\z)', $key);
	+ $is_ok = @preg_match('(^[a-z][a-z0-9._-]{2,}\z)', $key);
	if (!$is_ok) {
	if ($is_alias_of === null) {
	throw new Exception(
	diff --git a/src/config/source/ArcanistFilesystemConfigurationSource.php b/src/config/source/ArcanistFilesystemConfigurationSource.php
	--- a/src/config/source/ArcanistFilesystemConfigurationSource.php
	+++ b/src/config/source/ArcanistFilesystemConfigurationSource.php
	@@ -11,7 +11,7 @@
	$values = array();
	if (Filesystem::pathExists($path)) {
	$contents = Filesystem::readFile($path);
	- if (strlen(trim($contents))) {
	+ if (@strlen(trim($contents))) {
	$values = phutil_json_decode($contents);
	}
	}
	diff --git a/src/config/source/ArcanistRuntimeConfigurationSource.php b/src/config/source/ArcanistRuntimeConfigurationSource.php
	--- a/src/config/source/ArcanistRuntimeConfigurationSource.php
	+++ b/src/config/source/ArcanistRuntimeConfigurationSource.php
	@@ -6,7 +6,7 @@
	public function __construct(array $argv) {
	$map = array();
	foreach ($argv as $raw) {
	- $parts = explode('=', $raw, 2);
	+ $parts = @explode('=', $raw, 2);
	if (count($parts) !== 2) {
	throw new PhutilArgumentUsageException(
	pht(
	diff --git a/src/configuration/ArcanistConfiguration.php b/src/configuration/ArcanistConfiguration.php
	--- a/src/configuration/ArcanistConfiguration.php
	+++ b/src/configuration/ArcanistConfiguration.php
	@@ -126,7 +126,7 @@
	private function expandCommandPrefix($command, array $options) {
	$is_prefix = array();
	foreach ($options as $option) {
	- if (strncmp($option, $command, strlen($command)) == 0) {
	+ if (strncmp($option, $command, @strlen($command)) == 0) {
	$is_prefix[$option] = true;
	}
	}
	diff --git a/src/configuration/ArcanistConfigurationManager.php b/src/configuration/ArcanistConfigurationManager.php
	--- a/src/configuration/ArcanistConfigurationManager.php
	+++ b/src/configuration/ArcanistConfigurationManager.php
	@@ -258,7 +258,7 @@
	}

	public function getUserConfigurationFileLocation() {
	- if (strlen($this->customArcrcFilename)) {
	+ if (@strlen($this->customArcrcFilename)) {
	return $this->customArcrcFilename;
	}

	diff --git a/src/configuration/ArcanistSettings.php b/src/configuration/ArcanistSettings.php
	--- a/src/configuration/ArcanistSettings.php
	+++ b/src/configuration/ArcanistSettings.php
	@@ -180,17 +180,17 @@
	$type = $this->getType($key);
	switch ($type) {
	case 'bool':
	- if (strtolower($value) === 'false' \|\|
	- strtolower($value) === 'no' \|\|
	- strtolower($value) === 'off' \|\|
	+ if (@strtolower($value) === 'false' \|\|
	+ @strtolower($value) === 'no' \|\|
	+ @strtolower($value) === 'off' \|\|
	$value === '' \|\|
	$value === '0' \|\|
	$value === 0 \|\|
	$value === false) {
	$value = false;
	- } else if (strtolower($value) === 'true' \|\|
	- strtolower($value) === 'yes' \|\|
	- strtolower($value) === 'on' \|\|
	+ } else if (@strtolower($value) === 'true' \|\|
	+ @strtolower($value) === 'yes' \|\|
	+ @strtolower($value) === 'on' \|\|
	$value === '1' \|\|
	$value === 1 \|\|
	$value === true) {
	diff --git a/src/console/PhutilConsole.php b/src/console/PhutilConsole.php
	--- a/src/console/PhutilConsole.php
	+++ b/src/console/PhutilConsole.php
	@@ -170,7 +170,7 @@

	// Must be public because it is called from output buffering.
	public function redirectOutCallback($string) {
	- if (strlen($string)) {
	+ if (@strlen($string)) {
	$this->flushing = false;
	$this->writeOut('%s', $string);
	$this->flushing = true;
	diff --git a/src/console/PhutilConsoleProgressBar.php b/src/console/PhutilConsoleProgressBar.php
	--- a/src/console/PhutilConsoleProgressBar.php
	+++ b/src/console/PhutilConsoleProgressBar.php
	@@ -109,7 +109,7 @@
	}

	// Width of the stuff other than the progress bar itself.
	- $chrome_width = strlen('[] 100.0% ');
	+ $chrome_width = @strlen('[] 100.0% ');

	$char_width = $this->getWidth();
	if ($char_width < $chrome_width) {
	diff --git a/src/console/PhutilInteractiveEditor.php b/src/console/PhutilInteractiveEditor.php
	--- a/src/console/PhutilInteractiveEditor.php
	+++ b/src/console/PhutilInteractiveEditor.php
	@@ -132,7 +132,7 @@
	$offset_flag = '';
	if ($offset && !phutil_is_windows()) {
	$offset = (int)$offset;
	- if (preg_match('/^mate/', $editor)) {
	+ if (@preg_match('/^mate/', $editor)) {
	$offset_flag = csprintf('-l %d', $offset);
	} else {
	$offset_flag = csprintf('+%d', $offset);
	@@ -204,7 +204,7 @@
	* @task config
	*/
	public function getName() {
	- if (!strlen($this->name)) {
	+ if (!@strlen($this->name)) {
	return 'untitled';
	}
	return $this->name;
	diff --git a/src/console/__tests__/PhutilConsoleWrapTestCase.php b/src/console/__tests__/PhutilConsoleWrapTestCase.php
	--- a/src/console/__tests__/PhutilConsoleWrapTestCase.php
	+++ b/src/console/__tests__/PhutilConsoleWrapTestCase.php
	@@ -6,7 +6,7 @@
	$dir = dirname(__FILE__).'/wrap/';
	$files = Filesystem::listDirectory($dir);
	foreach ($files as $file) {
	- if (preg_match('/.txt$/', $file)) {
	+ if (@preg_match('/.txt$/', $file)) {
	$this->assertEqual(
	Filesystem::readFile($dir.$file.'.expect'),
	phutil_console_wrap(Filesystem::readFile($dir.$file)),
	diff --git a/src/console/format.php b/src/console/format.php
	--- a/src/console/format.php
	+++ b/src/console/format.php
	@@ -13,7 +13,7 @@

	do {
	$response = phutil_console_prompt($prompt.' '.$prompt_options);
	- $c = trim(strtolower($response));
	+ $c = trim(@strtolower($response));
	} while ($c != 'y' && $c != 'n' && $c != '');
	echo "\n";

	@@ -30,7 +30,7 @@
	$response = phutil_console_prompt($prompt.' '.$select_options);
	$selection = trim($response);

	- if (preg_match('/^\d+\z/', $selection)) {
	+ if (@preg_match('/^\d+\z/', $selection)) {
	$selection = (int)$selection;
	if ($selection >= $min && $selection <= $max) {
	return $selection;
	diff --git a/src/console/grid/ArcanistGridCell.php b/src/console/grid/ArcanistGridCell.php
	--- a/src/console/grid/ArcanistGridCell.php
	+++ b/src/console/grid/ArcanistGridCell.php
	@@ -31,7 +31,7 @@

	$width = 0;
	foreach ($lines as $line) {
	- $width = max($width, phutil_utf8_console_strlen($line));
	+ $width = max($width, phutil_utf8_consolestrlen($line));
	}

	return $width;
	diff --git a/src/console/grid/ArcanistGridView.php b/src/console/grid/ArcanistGridView.php
	--- a/src/console/grid/ArcanistGridView.php
	+++ b/src/console/grid/ArcanistGridView.php
	@@ -155,7 +155,7 @@
	}

	foreach ($content as $line_key => $line) {
	- $line_width = phutil_utf8_console_strlen($line);
	+ $line_width = phutil_utf8_consolestrlen($line);

	if ($line_width === $display_width) {
	continue;
	diff --git a/src/console/view/PhutilConsoleList.php b/src/console/view/PhutilConsoleList.php
	--- a/src/console/view/PhutilConsoleList.php
	+++ b/src/console/view/PhutilConsoleList.php
	@@ -42,7 +42,7 @@

	if ($this->bullet !== null) {
	$bullet = $this->bullet.' ';
	- $indent_depth = $indent_depth + phutil_utf8_console_strlen($bullet);
	+ $indent_depth = $indent_depth + phutil_utf8_consolestrlen($bullet);
	} else {
	$bullet = '';
	}
	diff --git a/src/console/view/PhutilConsoleTable.php b/src/console/view/PhutilConsoleTable.php
	--- a/src/console/view/PhutilConsoleTable.php
	+++ b/src/console/view/PhutilConsoleTable.php
	@@ -79,7 +79,7 @@
	foreach ($data as $key => $value) {
	$this->widths[$key] = max(
	idx($this->widths, $key, 0),
	- phutil_utf8_console_strlen($value));
	+ phutil_utf8_consolestrlen($value));
	}

	return $this;
	@@ -225,7 +225,7 @@
	protected function getWidth($key) {
	$width = max(
	idx($this->widths, $key),
	- phutil_utf8_console_strlen(
	+ phutil_utf8_consolestrlen(
	idx(idx($this->columns, $key, array()), 'title', '')));

	return $width + 2 * $this->padding;
	@@ -233,7 +233,7 @@

	protected function alignString($string, $width, $align) {
	$num_padding = $width -
	- (2 * $this->padding) - phutil_utf8_console_strlen($string);
	+ (2 * $this->padding) - phutil_utf8_consolestrlen($string);

	switch ($align) {
	case self::ALIGN_LEFT:
	diff --git a/src/difference/ArcanistDiffUtils.php b/src/difference/ArcanistDiffUtils.php
	--- a/src/difference/ArcanistDiffUtils.php
	+++ b/src/difference/ArcanistDiffUtils.php
	@@ -16,7 +16,7 @@
	// presence of NULL ("\0") bytes. Git only examines the first "few" bytes of
	// each file (8KB or so) as an optimization, but we don't have a reasonable
	// equivalent in PHP, so just look at all of it.
	- return (strpos($data, "\0") !== false);
	+ return (@strpos($data, "\0") !== false);
	}

	public static function renderDifferences(
	@@ -46,8 +46,8 @@
	}

	public static function generateIntralineDiff($o, $n) {
	- $ol = strlen($o);
	- $nl = strlen($n);
	+ $ol = @strlen($o);
	+ $nl = @strlen($n);

	if (($o === $n) \|\| !$ol \|\| !$nl) {
	return array(
	@@ -60,8 +60,8 @@
	// lines. Inputs take ~200x more memory to represent as lists than as
	// strings, so we can run out of memory quickly if we try to split huge
	// inputs. See T11744.
	- $ol = strlen($o);
	- $nl = strlen($n);
	+ $ol = @strlen($o);
	+ $nl = @strlen($n);

	$max_glyphs = 100;

	@@ -105,7 +105,7 @@
	}

	private static function computeIntralineEdits($o, $n, $max_glyphs) {
	- if (preg_match('/[\x80-\xFF]/', $o.$n)) {
	+ if (@preg_match('/[\x80-\xFF]/', $o.$n)) {
	$ov = phutil_utf8v_combined($o);
	$nv = phutil_utf8v_combined($n);
	$multibyte = true;
	@@ -124,7 +124,7 @@

	$o_pos = 0;
	$n_pos = 0;
	- $result_len = strlen($result);
	+ $result_len = @strlen($result);
	$o_run = array();
	$n_run = array();

	@@ -135,8 +135,8 @@
	$c = $result[$ii];

	if ($multibyte) {
	- $old_char_len = strlen($ov[$o_pos]);
	- $new_char_len = strlen($nv[$n_pos]);
	+ $old_char_len = @strlen($ov[$o_pos]);
	+ $new_char_len = @strlen($nv[$n_pos]);
	}

	switch ($c) {
	diff --git a/src/differential/ArcanistDifferentialCommitMessage.php b/src/differential/ArcanistDifferentialCommitMessage.php
	--- a/src/differential/ArcanistDifferentialCommitMessage.php
	+++ b/src/differential/ArcanistDifferentialCommitMessage.php
	@@ -21,7 +21,7 @@

	$pattern = '/^git-svn-id:\s([^@]+)@(\d+)\s+(.)$/m';
	$match = null;
	- if (preg_match($pattern, $corpus, $match)) {
	+ if (@preg_match($pattern, $corpus, $match)) {
	$obj->gitSVNBaseRevision = $match[1].'@'.$match[2];
	$obj->gitSVNBasePath = $match[1];
	$obj->gitSVNUUID = $match[3];
	@@ -116,7 +116,7 @@
	*/
	private function parseRevisionIDFromRawCorpus($corpus) {
	$match = null;
	- if (!preg_match('/^Differential Revision:\s*(.+)/im', $corpus, $match)) {
	+ if (!@preg_match('/^Differential Revision:\s*(.+)/im', $corpus, $match)) {
	return null;
	}

	@@ -124,7 +124,7 @@
	$revision_pattern = '/^[dD]([1-9]\d*)\z/';

	// Accept a bare revision ID like "D123".
	- if (preg_match($revision_pattern, $revision_value, $match)) {
	+ if (@preg_match($revision_pattern, $revision_value, $match)) {
	return (int)$match[1];
	}

	@@ -132,7 +132,7 @@
	$uri = new PhutilURI($revision_value);
	$path = $uri->getPath();
	$path = trim($path, '/');
	- if (preg_match($revision_pattern, $path, $match)) {
	+ if (@preg_match($revision_pattern, $path, $match)) {
	return (int)$match[1];
	}

	diff --git a/src/error/PhutilErrorHandler.php b/src/error/PhutilErrorHandler.php
	--- a/src/error/PhutilErrorHandler.php
	+++ b/src/error/PhutilErrorHandler.php
	@@ -222,7 +222,7 @@
	}

	// Convert typehint failures into exceptions.
	- if (preg_match('/^Argument (\d+) passed to (\S+) must be/', $str)) {
	+ if (@preg_match('/^Argument (\d+) passed to (\S+) must be/', $str)) {
	throw new InvalidArgumentException($str);
	}

	@@ -232,28 +232,28 @@
	}

	// Convert uses of undefined variables into exceptions.
	- if (preg_match('/^Undefined variable: /', $str)) {
	+ if (@preg_match('/^Undefined variable: /', $str)) {
	throw new RuntimeException($str);
	}

	// Convert uses of undefined properties into exceptions.
	- if (preg_match('/^Undefined property: /', $str)) {
	+ if (@preg_match('/^Undefined property: /', $str)) {
	throw new RuntimeException($str);
	}

	// Convert undefined constants into exceptions. Usually this means there
	// is a missing `$` and the program is horribly broken.
	- if (preg_match('/^Use of undefined constant /', $str)) {
	+ if (@preg_match('/^Use of undefined constant /', $str)) {
	throw new RuntimeException($str);
	}

	// Convert undefined indexes into exceptions.
	- if (preg_match('/^Undefined index: /', $str)) {
	+ if (@preg_match('/^Undefined index: /', $str)) {
	throw new RuntimeException($str);
	}

	// Convert undefined offsets into exceptions.
	- if (preg_match('/^Undefined offset: /', $str)) {
	+ if (@preg_match('/^Undefined offset: /', $str)) {
	throw new RuntimeException($str);
	}

	@@ -298,7 +298,7 @@
	* @task internal
	*/
	public static function outputStacktrace($trace) {
	- $lines = explode("\n", self::formatStacktrace($trace));
	+ $lines = @explode("\n", self::formatStacktrace($trace));
	foreach ($lines as $line) {
	error_log($line);
	}
	@@ -378,7 +378,7 @@
	* @task internal
	*/
	public static function dispatchErrorMessage($event, $value, $metadata) {
	- $timestamp = strftime('%Y-%m-%d %H:%M:%S');
	+ $timestamp = @strftime('%Y-%m-%d %H:%M:%S');

	switch ($event) {
	case self::ERROR:
	@@ -402,8 +402,8 @@
	} while ($current = self::getPreviousException($current));
	$messages = implode(' {>} ', $messages);

	- if (strlen($messages) > 4096) {
	- $messages = substr($messages, 0, 4096).'...';
	+ if (@strlen($messages) > 4096) {
	+ $messages = @substr($messages, 0, 4096).'...';
	}

	$default_message = sprintf(
	@@ -476,8 +476,8 @@
	break;
	}

	- if (!strncmp($root, $path, strlen($root))) {
	- return '<'.$library.'>'.substr($path, strlen($root));
	+ if (!strncmp($root, $path, @strlen($root))) {
	+ return '<'.$library.'>'.@substr($path, @strlen($root));
	}
	}

	@@ -504,7 +504,7 @@
	if (@file_exists($try_file)) {
	$head = @file_get_contents($try_file);
	$matches = null;
	- if (preg_match('(^ref: refs/heads/(.*)$)', trim($head), $matches)) {
	+ if (@preg_match('(^ref: refs/heads/(.*)$)', trim($head), $matches)) {
	$libinfo[$library]['head'] = trim($matches[1]);
	$get_refs[] = trim($matches[1]);
	} else {
	@@ -521,7 +521,7 @@
	if (@file_exists($try_file)) {
	$hash = @file_get_contents($try_file);
	if ($hash) {
	- $libinfo[$library]['ref.'.$ref] = substr(trim($hash), 0, 12);
	+ $libinfo[$library]['ref.'.$ref] = @substr(trim($hash), 0, 12);
	break;
	}
	}
	@@ -533,7 +533,7 @@
	if ($custom) {
	$count = 0;
	foreach ($custom as $custom_path) {
	- if (preg_match('/\.php$/', $custom_path)) {
	+ if (@preg_match('/\.php$/', $custom_path)) {
	$count++;
	}
	}
	diff --git a/src/error/PhutilOpaqueEnvelope.php b/src/error/PhutilOpaqueEnvelope.php
	--- a/src/error/PhutilOpaqueEnvelope.php
	+++ b/src/error/PhutilOpaqueEnvelope.php
	@@ -60,9 +60,9 @@
	*/
	private function mask($string, $noise) {
	$result = '';
	- for ($ii = 0; $ii < strlen($string); $ii++) {
	+ for ($ii = 0; $ii < @strlen($string); $ii++) {
	$s = $string[$ii];
	- $n = $noise[$ii % strlen($noise)];
	+ $n = $noise[$ii % @strlen($noise)];

	$result .= chr(ord($s) ^ ord($n));
	}
	diff --git a/src/error/__tests__/PhutilErrorHandlerTestCase.php b/src/error/__tests__/PhutilErrorHandlerTestCase.php
	--- a/src/error/__tests__/PhutilErrorHandlerTestCase.php
	+++ b/src/error/__tests__/PhutilErrorHandlerTestCase.php
	@@ -17,7 +17,7 @@

	public function testSilenceHandler() {
	// Errors should normally be logged.
	- $this->assertTrue(strlen($this->emitError()) > 0);
	+ $this->assertTrue(@strlen($this->emitError()) > 0);

	// The "@" operator should silence errors.
	$this->assertTrue(@strlen($this->emitError()) === 0);
	diff --git a/src/error/__tests__/PhutilOpaqueEnvelopeTestCase.php b/src/error/__tests__/PhutilOpaqueEnvelopeTestCase.php
	--- a/src/error/__tests__/PhutilOpaqueEnvelopeTestCase.php
	+++ b/src/error/__tests__/PhutilOpaqueEnvelopeTestCase.php
	@@ -17,15 +17,15 @@

	$envelope = new PhutilOpaqueEnvelope($secret);

	- $this->assertFalse(strpos(var_export($envelope, true), $secret));
	+ $this->assertFalse(@strpos(var_export($envelope, true), $secret));

	- $this->assertFalse(strpos(print_r($envelope, true), $secret));
	+ $this->assertFalse(@strpos(print_r($envelope, true), $secret));

	ob_start();
	var_dump($envelope);
	$dump = ob_get_clean();

	- $this->assertFalse(strpos($dump, $secret));
	+ $this->assertFalse(@strpos($dump, $secret));

	try {
	$this->throwTrace($envelope, $signpost);
	@@ -38,15 +38,15 @@
	$trace = array_slice($trace, 0, 2);
	$trace = print_r($trace, true);

	- $this->assertTrue(strpos($trace, $signpost) !== false);
	- $this->assertFalse(strpos($trace, $secret));
	+ $this->assertTrue(@strpos($trace, $signpost) !== false);
	+ $this->assertFalse(@strpos($trace, $secret));
	}

	$backtrace = $this->getBacktrace($envelope, $signpost);
	$backtrace = array_slice($backtrace, 0, 2);

	- $this->assertTrue(strpos($trace, $signpost) !== false);
	- $this->assertFalse(strpos(print_r($backtrace, true), $secret));
	+ $this->assertTrue(@strpos($trace, $signpost) !== false);
	+ $this->assertFalse(@strpos(print_r($backtrace, true), $secret));

	$this->assertEqual($secret, $envelope->openEnvelope());
	}
	diff --git a/src/filesystem/FileFinder.php b/src/filesystem/FileFinder.php
	--- a/src/filesystem/FileFinder.php
	+++ b/src/filesystem/FileFinder.php
	@@ -194,7 +194,7 @@
	private function getFiles($dir) {
	$found = Filesystem::listDirectory($this->root.'/'.$dir, true);
	$files = array();
	- if (strlen($dir) > 0) {
	+ if (@strlen($dir) > 0) {
	$dir = rtrim($dir, '/').'/';
	}
	foreach ($found as $filename) {
	@@ -296,11 +296,11 @@
	->resolvex();

	$stdout = trim($stdout);
	- if (!strlen($stdout)) {
	+ if (!@strlen($stdout)) {
	return array();
	}

	- $files = explode("\0", $stdout);
	+ $files = @explode("\0", $stdout);

	// On OSX/BSD, find prepends a './' to each file.
	foreach ($files as $key => $file) {
	@@ -311,8 +311,8 @@
	continue;
	}

	- if (substr($files[$key], 0, 2) == './') {
	- $files[$key] = substr($files[$key], 2);
	+ if (@substr($files[$key], 0, 2) == './') {
	+ $files[$key] = @substr($files[$key], 2);
	}
	}
	}
	diff --git a/src/filesystem/FileList.php b/src/filesystem/FileList.php
	--- a/src/filesystem/FileList.php
	+++ b/src/filesystem/FileList.php
	@@ -69,7 +69,7 @@
	return true;
	}
	if ($allow_parent_directory) {
	- $len = strlen($file);
	+ $len = @strlen($file);
	if (isset($this->dirs[$file]) && !strncmp($file, $path, $len)) {
	return true;
	}
	diff --git a/src/filesystem/Filesystem.php b/src/filesystem/Filesystem.php
	--- a/src/filesystem/Filesystem.php
	+++ b/src/filesystem/Filesystem.php
	@@ -236,7 +236,7 @@
	$path,
	pht("Failed to open file '%s'.", $path));
	}
	- $dlen = strlen($data);
	+ $dlen = @strlen($data);
	if (fwrite($fh, $data) !== $dlen) {
	throw new FilesystemException(
	$path,
	@@ -275,7 +275,7 @@
	$trap->destroy();

	if (!$ok) {
	- if (strlen($err)) {
	+ if (@strlen($err)) {
	throw new FilesystemException(
	$to,
	pht(
	@@ -307,7 +307,7 @@
	* @task file
	*/
	public static function remove($path) {
	- if (!strlen($path)) {
	+ if (!@strlen($path)) {
	// Avoid removing PWD.
	throw new Exception(
	pht(
	@@ -469,12 +469,12 @@
	'openssl_random_pseudo_bytes()'));
	}

	- if (strlen($data) != $number_of_bytes) {
	+ if (@strlen($data) != $number_of_bytes) {
	throw new Exception(
	pht(
	'%s returned an unexpected number of bytes (got %s, expected %s)!',
	'openssl_random_pseudo_bytes()',
	- new PhutilNumber(strlen($data)),
	+ new PhutilNumber(@strlen($data)),
	new PhutilNumber($number_of_bytes)));
	}

	@@ -490,7 +490,7 @@
	if ($urandom) {
	$data = @fread($urandom, $number_of_bytes);
	@fclose($urandom);
	- if (strlen($data) != $number_of_bytes) {
	+ if (@strlen($data) != $number_of_bytes) {
	throw new FilesystemException(
	'/dev/urandom',
	pht('Failed to read random bytes!'));
	@@ -673,8 +673,8 @@
	}

	// If we come back with an encoding, strip it off.
	- if (strpos($mime_type, ';') !== false) {
	- list($type, $encoding) = explode(';', $mime_type, 2);
	+ if (@strpos($mime_type, ';') !== false) {
	+ list($type, $encoding) = @explode(';', $mime_type, 2);
	$mime_type = $type;
	}

	@@ -785,7 +785,7 @@

	$tries = 3;
	do {
	- $dir = $base.substr(base_convert(md5(mt_rand()), 16, 36), 0, 16);
	+ $dir = $base.@substr(base_convert(md5(mt_rand()), 16, 36), 0, 16);
	try {
	self::createDirectory($dir, $umask);
	break;
	@@ -888,9 +888,9 @@
	}

	$walk = array();
	- $parts = explode(DIRECTORY_SEPARATOR, $path);
	+ $parts = @explode(DIRECTORY_SEPARATOR, $path);
	foreach ($parts as $k => $part) {
	- if (!strlen($part)) {
	+ if (!@strlen($part)) {
	unset($parts[$k]);
	}
	}
	@@ -929,7 +929,7 @@
	*/
	public static function isAbsolutePath($path) {
	if (phutil_is_windows()) {
	- return (bool)preg_match('/^[A-Za-z]+:/', $path);
	+ return (bool)@preg_match('/^[A-Za-z]+:/', $path);
	} else {
	return !strncmp($path, DIRECTORY_SEPARATOR, 1);
	}
	@@ -984,7 +984,7 @@
	$path = str_replace('/', '\\', $path);
	} else {
	$parts = trim($path, '/');
	- $parts = explode('/', $parts);
	+ $parts = @explode('/', $parts);
	}

	while ($parts) {
	@@ -996,7 +996,7 @@
	}
	$realpath = realpath($attempt);
	if ($realpath !== false) {
	- $path = $realpath.substr($path, strlen($attempt));
	+ $path = $realpath.@substr($path, @strlen($attempt));
	break;
	}
	}
	@@ -1045,9 +1045,9 @@

	foreach (array($pwd, self::resolvePath($pwd)) as $parent) {
	$parent = rtrim($parent, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;
	- $len = strlen($parent);
	+ $len = @strlen($parent);
	if (!strncmp($parent, $path, $len)) {
	- $path = substr($path, $len);
	+ $path = @substr($path, $len);
	return $path;
	}
	}
	diff --git a/src/filesystem/PhutilErrorLog.php b/src/filesystem/PhutilErrorLog.php
	--- a/src/filesystem/PhutilErrorLog.php
	+++ b/src/filesystem/PhutilErrorLog.php
	@@ -92,7 +92,7 @@

	$message = idx($metadata, 'default_message');

	- if (strlen($message)) {
	+ if (@strlen($message)) {
	$message = tsprintf("%B\n", $message);
	@fwrite(STDERR, $message);
	}
	diff --git a/src/filesystem/PhutilProcessQuery.php b/src/filesystem/PhutilProcessQuery.php
	--- a/src/filesystem/PhutilProcessQuery.php
	+++ b/src/filesystem/PhutilProcessQuery.php
	@@ -47,7 +47,7 @@
	$instance = null;
	if ($ref->getIsOverseer()) {
	$matches = null;
	- if (preg_match('/-l (\S+)/', $command, $matches)) {
	+ if (@preg_match('/-l (\S+)/', $command, $matches)) {
	$instance = $matches[1];
	}
	}
	@@ -105,7 +105,7 @@
	$proc_cmdline = sprintf('/proc/%d/cmdline', $pid);
	try {
	$argv = Filesystem::readFile($proc_cmdline);
	- $argv = explode("\0", $argv);
	+ $argv = @explode("\0", $argv);

	// The output itself is terminated with "\0", so remove the final empty
	// argument.
	diff --git a/src/filesystem/__tests__/FilesystemTestCase.php b/src/filesystem/__tests__/FilesystemTestCase.php
	--- a/src/filesystem/__tests__/FilesystemTestCase.php
	+++ b/src/filesystem/__tests__/FilesystemTestCase.php
	@@ -58,7 +58,7 @@
	public function testReadRandomBytes() {
	$number_of_bytes = 1024;
	$data = Filesystem::readRandomBytes($number_of_bytes);
	- $this->assertTrue(strlen($data) == $number_of_bytes);
	+ $this->assertTrue(@strlen($data) == $number_of_bytes);

	$data1 = Filesystem::readRandomBytes(128);
	$data2 = Filesystem::readRandomBytes(128);
	diff --git a/src/filesystem/__tests__/PhutilFileLockTestCase.php b/src/filesystem/__tests__/PhutilFileLockTestCase.php
	--- a/src/filesystem/__tests__/PhutilFileLockTestCase.php
	+++ b/src/filesystem/__tests__/PhutilFileLockTestCase.php
	@@ -162,7 +162,7 @@
	while (!$future->isReady()) {
	list($stdout) = $future->read();
	$buf .= $stdout;
	- if (strpos($buf, 'LOCK ACQUIRED') !== false) {
	+ if (@strpos($buf, 'LOCK ACQUIRED') !== false) {
	return $future;
	}
	}
	diff --git a/src/filesystem/binary/PhutilDiffBinaryAnalyzer.php b/src/filesystem/binary/PhutilDiffBinaryAnalyzer.php
	--- a/src/filesystem/binary/PhutilDiffBinaryAnalyzer.php
	+++ b/src/filesystem/binary/PhutilDiffBinaryAnalyzer.php
	@@ -18,10 +18,10 @@
	public static function parseDiffBinaryVersion($stdout) {
	$prefix = 'diff (GNU diffutils) ';

	- if (preg_match('(^'.preg_quote($prefix).')', $stdout)) {
	+ if (@preg_match('(^'.preg_quote($prefix).')', $stdout)) {
	$lines = phutil_split_lines($stdout, false);
	$line = head($lines);
	- $version = substr($line, strlen($prefix));
	+ $version = @substr($line, @strlen($prefix));
	return $version;
	}

	diff --git a/src/filesystem/binary/PhutilGitBinaryAnalyzer.php b/src/filesystem/binary/PhutilGitBinaryAnalyzer.php
	--- a/src/filesystem/binary/PhutilGitBinaryAnalyzer.php
	+++ b/src/filesystem/binary/PhutilGitBinaryAnalyzer.php
	@@ -16,8 +16,8 @@
	}

	public static function parseGitBinaryVersion($stdout) {
	- if (preg_match('/^git version /', $stdout)) {
	- $version = substr($stdout, strlen('git version '));
	+ if (@preg_match('/^git version /', $stdout)) {
	+ $version = @substr($stdout, @strlen('git version '));
	$version = trim($version);
	return $version;
	}
	diff --git a/src/filesystem/binary/PhutilMercurialBinaryAnalyzer.php b/src/filesystem/binary/PhutilMercurialBinaryAnalyzer.php
	--- a/src/filesystem/binary/PhutilMercurialBinaryAnalyzer.php
	+++ b/src/filesystem/binary/PhutilMercurialBinaryAnalyzer.php
	@@ -32,7 +32,7 @@

	$matches = null;
	$pattern = '/^Mercurial Distributed SCM \(version ([\d.]+)/m';
	- if (preg_match($pattern, $stdout, $matches)) {
	+ if (@preg_match($pattern, $stdout, $matches)) {
	return $matches[1];
	}

	diff --git a/src/filesystem/binary/PhutilPygmentizeBinaryAnalyzer.php b/src/filesystem/binary/PhutilPygmentizeBinaryAnalyzer.php
	--- a/src/filesystem/binary/PhutilPygmentizeBinaryAnalyzer.php
	+++ b/src/filesystem/binary/PhutilPygmentizeBinaryAnalyzer.php
	@@ -21,7 +21,7 @@

	$pattern = '(^Pygments version ([^,]+),)';
	$matches = null;
	- if (preg_match($pattern, $stdout, $matches)) {
	+ if (@preg_match($pattern, $stdout, $matches)) {
	return $matches[1];
	}

	diff --git a/src/filesystem/linesofalarge/LinesOfALarge.php b/src/filesystem/linesofalarge/LinesOfALarge.php
	--- a/src/filesystem/linesofalarge/LinesOfALarge.php
	+++ b/src/filesystem/linesofalarge/LinesOfALarge.php
	@@ -9,7 +9,7 @@
	*
	* If your stream is not large, it is generally more efficient (and certainly
	* simpler) to read the entire stream first and then process it (e.g., with
	- * `explode()`).
	+ * `@explode()`).
	*
	* This class is abstract. The concrete implementations available are:
	*
	@@ -61,7 +61,7 @@
	* @task config
	*/
	final public function setDelimiter($character) {
	- if (($character !== null) && (strlen($character) !== 1)) {
	+ if (($character !== null) && (@strlen($character) !== 1)) {
	throw new Exception(
	pht('Delimiter character must be one byte in length or null.'));
	}
	@@ -150,12 +150,12 @@
	// case the size of a line is very large compared to the chunk size we
	// read.
	while (true) {
	- if (strlen($this->buf)) {
	+ if (@strlen($this->buf)) {

	// If we don't have a delimiter, return the entire buffer.
	if ($this->delimiter === null) {
	$this->num++;
	- $this->line = substr($this->buf, $this->pos);
	+ $this->line = @substr($this->buf, $this->pos);
	$this->buf = '';
	$this->pos = 0;
	return;
	@@ -164,7 +164,7 @@
	// If we already have some data buffered, try to get the next line from
	// the buffer. Search through the buffer for a delimiter. This should be
	// the common case.
	- $endl = strpos($this->buf, $this->delimiter, $this->pos);
	+ $endl = @strpos($this->buf, $this->delimiter, $this->pos);

	if ($endl !== false) {
	// We found a delimiter, so return the line it delimits. We leave
	@@ -172,7 +172,7 @@
	// large relative to the size of a line. Instead, we move our cursor
	// within the buffer forward.
	$this->num++;
	- $this->line = substr($this->buf, $this->pos, ($endl - $this->pos));
	+ $this->line = @substr($this->buf, $this->pos, ($endl - $this->pos));
	$this->pos = $endl + 1;
	return;
	}
	@@ -180,7 +180,7 @@
	// We only have part of a line left in the buffer (no delimiter in the
	// remaining piece), so throw away the part we've already emitted and
	// continue below.
	- $this->buf = substr($this->buf, $this->pos);
	+ $this->buf = @substr($this->buf, $this->pos);
	$this->pos = 0;
	}

	@@ -199,7 +199,7 @@
	$more = $this->readMore();
	}

	- if (strlen($more)) {
	+ if (@strlen($more)) {
	// We got some bytes, so add them to the buffer and then try again.
	$this->buf .= $more;
	continue;
	@@ -209,7 +209,7 @@
	// delimiter, but that currently seems reasonable as a default
	// behavior. If we don't have a buffer, we're done.
	$this->eof = true;
	- if (strlen($this->buf)) {
	+ if (@strlen($this->buf)) {
	$this->num++;
	$this->line = $this->buf;
	$this->buf = null;
	diff --git a/src/filesystem/linesofalarge/LinesOfALargeExecFuture.php b/src/filesystem/linesofalarge/LinesOfALargeExecFuture.php
	--- a/src/filesystem/linesofalarge/LinesOfALargeExecFuture.php
	+++ b/src/filesystem/linesofalarge/LinesOfALargeExecFuture.php
	@@ -4,7 +4,7 @@
	* Read the output stream of an @{class:ExecFuture} one line at a time. This
	* abstraction allows you to process large inputs without holding them in
	* memory. If you know your inputs fit in memory, it is generally more efficient
	- * (and certainly simpler) to read the entire input and `explode()` it. For
	+ * (and certainly simpler) to read the entire input and `@explode()` it. For
	* more information, see @{class:LinesOfALarge}. See also
	* @{class:LinesOfALargeFile} for a similar abstraction that works on files.
	*
	@@ -94,7 +94,7 @@
	$stdout = $future->readStdout();
	$future->discardStdoutBuffer();

	- if (strlen($stdout)) {
	+ if (@strlen($stdout)) {
	return $stdout;
	}

	diff --git a/src/filesystem/linesofalarge/LinesOfALargeFile.php b/src/filesystem/linesofalarge/LinesOfALargeFile.php
	--- a/src/filesystem/linesofalarge/LinesOfALargeFile.php
	+++ b/src/filesystem/linesofalarge/LinesOfALargeFile.php
	@@ -3,7 +3,7 @@
	/**
	* Read the lines of a file, one at a time. This allows you to process large
	* files without holding them in memory. In most cases, it is more efficient
	- * (and certainly simpler) to read the entire file and `explode()` it. For more
	+ * (and certainly simpler) to read the entire file and `@explode()` it. For more
	* information, see @{class:LinesOfALarge}. See also
	* @{class:LinesOfALargeExecFuture}, for a similar abstraction that works on
	* executed commands.
	diff --git a/src/future/aws/PhutilAWSv4Signature.php b/src/future/aws/PhutilAWSv4Signature.php
	--- a/src/future/aws/PhutilAWSv4Signature.php
	+++ b/src/future/aws/PhutilAWSv4Signature.php
	@@ -175,7 +175,7 @@

	private function getScopeParts() {
	return array(
	- substr($this->getDate(), 0, 8),
	+ @substr($this->getDate(), 0, 8),
	$this->getRegion(),
	$this->getService(),
	'aws4_request',
	@@ -252,7 +252,7 @@

	private function getCredential() {
	$access_key = $this->accessKey;
	- if (!strlen($access_key)) {
	+ if (!@strlen($access_key)) {
	throw new PhutilInvalidStateException('setAccessKey');
	}

	diff --git a/src/future/aws/management/PhutilAWSManagementWorkflow.php b/src/future/aws/management/PhutilAWSManagementWorkflow.php
	--- a/src/future/aws/management/PhutilAWSManagementWorkflow.php
	+++ b/src/future/aws/management/PhutilAWSManagementWorkflow.php
	@@ -13,9 +13,9 @@
	$access_key = $argv->getArg('access-key');
	$secret_key = $argv->getArg('secret-key');

	- $has_root = (strlen($access_key) \|\| strlen($secret_key));
	+ $has_root = (@strlen($access_key) \|\| @strlen($secret_key));
	if ($has_root) {
	- if (!strlen($access_key) \|\| !strlen($secret_key)) {
	+ if (!@strlen($access_key) \|\| !@strlen($secret_key)) {
	throw new PhutilArgumentUsageException(
	pht(
	'When specifying AWS credentials with --access-key and '.
	@@ -35,7 +35,7 @@
	}

	$region = $argv->getArg('region');
	- if (!strlen($region)) {
	+ if (!@strlen($region)) {
	throw new PhutilArgumentUsageException(
	pht(
	'You must specify an AWS region with --region.'));
	@@ -44,7 +44,7 @@
	$template->setRegion($region);

	$endpoint = $argv->getArg('endpoint');
	- if (!strlen($endpoint)) {
	+ if (!@strlen($endpoint)) {
	throw new PhutilArgumentUsageException(
	pht(
	'You must specify an AWS endpoint with --endpoint.'));
	diff --git a/src/future/aws/management/PhutilAWSS3DeleteManagementWorkflow.php b/src/future/aws/management/PhutilAWSS3DeleteManagementWorkflow.php
	--- a/src/future/aws/management/PhutilAWSS3DeleteManagementWorkflow.php
	+++ b/src/future/aws/management/PhutilAWSS3DeleteManagementWorkflow.php
	@@ -24,7 +24,7 @@

	public function execute(PhutilArgumentParser $args) {
	$key = $args->getArg('key');
	- if (!strlen($key)) {
	+ if (!@strlen($key)) {
	throw new PhutilArgumentUsageException(
	pht(
	'Specify an AWS S3 object key to access with --key.'));
	diff --git a/src/future/aws/management/PhutilAWSS3GetManagementWorkflow.php b/src/future/aws/management/PhutilAWSS3GetManagementWorkflow.php
	--- a/src/future/aws/management/PhutilAWSS3GetManagementWorkflow.php
	+++ b/src/future/aws/management/PhutilAWSS3GetManagementWorkflow.php
	@@ -24,21 +24,21 @@

	public function execute(PhutilArgumentParser $args) {
	$bucket = $args->getArg('bucket');
	- if (!strlen($bucket)) {
	+ if (!@strlen($bucket)) {
	throw new PhutilArgumentUsageException(
	pht(
	'Specify an AWS S3 bucket to access with --bucket.'));
	}

	$endpoint = $args->getArg('endpoint');
	- if (!strlen($endpoint)) {
	+ if (!@strlen($endpoint)) {
	throw new PhutilArgumentUsageException(
	pht(
	'Specify an AWS S3 endpoint with --endpoint.'));
	}

	$key = $args->getArg('key');
	- if (!strlen($key)) {
	+ if (!@strlen($key)) {
	throw new PhutilArgumentUsageException(
	pht(
	'Specify an AWS S3 object key to access with --key.'));
	diff --git a/src/future/aws/management/PhutilAWSS3PutManagementWorkflow.php b/src/future/aws/management/PhutilAWSS3PutManagementWorkflow.php
	--- a/src/future/aws/management/PhutilAWSS3PutManagementWorkflow.php
	+++ b/src/future/aws/management/PhutilAWSS3PutManagementWorkflow.php
	@@ -24,7 +24,7 @@

	public function execute(PhutilArgumentParser $args) {
	$key = $args->getArg('key');
	- if (!strlen($key)) {
	+ if (!@strlen($key)) {
	throw new PhutilArgumentUsageException(
	pht(
	'Specify an AWS S3 object key to access with --key.'));
	diff --git a/src/future/exec/CommandException.php b/src/future/exec/CommandException.php
	--- a/src/future/exec/CommandException.php
	+++ b/src/future/exec/CommandException.php
	@@ -52,18 +52,18 @@
	}

	private function summarize($string) {
	- if (!strlen($string)) {
	+ if (!@strlen($string)) {
	return '(empty)';
	}

	$limit = 1000;

	- $len = strlen($string);
	+ $len = @strlen($string);
	if ($len > $limit) {
	$cut = $len - $limit;
	$suffix = pht('... (%s more byte(s)) ...', new PhutilNumber($cut));
	- if ($cut > strlen($suffix)) {
	- $string = substr($string, 0, $limit).$suffix;
	+ if ($cut > @strlen($suffix)) {
	+ $string = @substr($string, 0, $limit).$suffix;
	}
	}

	diff --git a/src/future/exec/ExecFuture.php b/src/future/exec/ExecFuture.php
	--- a/src/future/exec/ExecFuture.php
	+++ b/src/future/exec/ExecFuture.php
	@@ -196,10 +196,10 @@

	$result = array(
	$stdout,
	- (string)substr($this->stderr, $this->stderrPos),
	+ (string)@substr($this->stderr, $this->stderrPos),
	);

	- $this->stderrPos = strlen($this->stderr);
	+ $this->stderrPos = @strlen($this->stderr);

	return $result;
	}
	@@ -209,8 +209,8 @@
	$this->updateFuture(); // Sync
	}

	- $result = (string)substr($this->stdout, $this->stdoutPos);
	- $this->stdoutPos = strlen($this->stdout);
	+ $result = (string)@substr($this->stdout, $this->stdoutPos);
	+ $this->stdoutPos = @strlen($this->stdout);
	return $result;
	}

	@@ -228,7 +228,7 @@
	* @task interact
	*/
	public function write($data, $keep_pipe = false) {
	- if (strlen($data)) {
	+ if (@strlen($data)) {
	if (!$this->stdin) {
	throw new Exception(pht('Writing to a closed pipe!'));
	}
	@@ -337,7 +337,7 @@
	*/
	public function resolveJSON() {
	list($stdout, $stderr) = $this->resolvex();
	- if (strlen($stderr)) {
	+ if (@strlen($stderr)) {
	$cmd = $this->getCommand();
	throw new CommandException(
	pht(
	@@ -475,7 +475,7 @@
	* @task internal
	*/
	public function isReadBufferEmpty() {
	- return !strlen($this->stdout);
	+ return !@strlen($this->stdout);
	}


	@@ -531,17 +531,17 @@
	throw new Exception(pht('Failed to read from %s', $description));
	}

	- $read_bytes = strlen($data);
	+ $read_bytes = @strlen($data);

	if ($read_bytes > 0 && $limit > 0) {
	if ($read_bytes > $limit) {
	- $data = substr($data, 0, $limit);
	+ $data = @substr($data, 0, $limit);
	}
	$output .= $data;
	- $limit -= strlen($data);
	+ $limit -= @strlen($data);
	}

	- if (strlen($output) >= $length) {
	+ if (@strlen($output) >= $length) {
	break;
	}
	} while ($read_bytes > 0);
	@@ -757,14 +757,14 @@
	$max_stdout_read_bytes = PHP_INT_MAX;
	$max_stderr_read_bytes = PHP_INT_MAX;
	if ($read_buffer_size !== null) {
	- $max_stdout_read_bytes = $read_buffer_size - strlen($this->stdout);
	- $max_stderr_read_bytes = $read_buffer_size - strlen($this->stderr);
	+ $max_stdout_read_bytes = $read_buffer_size - @strlen($this->stdout);
	+ $max_stderr_read_bytes = $read_buffer_size - @strlen($this->stderr);
	}

	if ($max_stdout_read_bytes > 0) {
	$this->stdout .= $this->readAndDiscard(
	$stdout,
	- $this->getStdoutSizeLimit() - strlen($this->stdout),
	+ $this->getStdoutSizeLimit() - @strlen($this->stdout),
	'stdout',
	$max_stdout_read_bytes);
	}
	@@ -772,7 +772,7 @@
	if ($max_stderr_read_bytes > 0) {
	$this->stderr .= $this->readAndDiscard(
	$stderr,
	- $this->getStderrSizeLimit() - strlen($this->stderr),
	+ $this->getStderrSizeLimit() - @strlen($this->stderr),
	'stderr',
	$max_stderr_read_bytes);
	}
	diff --git a/src/future/exec/PhutilExecutableFuture.php b/src/future/exec/PhutilExecutableFuture.php
	--- a/src/future/exec/PhutilExecutableFuture.php
	+++ b/src/future/exec/PhutilExecutableFuture.php
	@@ -142,7 +142,7 @@

	foreach ($known_keys as $known_key) {
	$value = getenv($known_key);
	- if (strlen($value)) {
	+ if (@strlen($value)) {
	$default_env[$known_key] = $value;
	}
	}
	diff --git a/src/future/exec/__tests__/ExecFutureTestCase.php b/src/future/exec/__tests__/ExecFutureTestCase.php
	--- a/src/future/exec/__tests__/ExecFutureTestCase.php
	+++ b/src/future/exec/__tests__/ExecFutureTestCase.php
	@@ -54,7 +54,7 @@
	->write($data)
	->resolvex();

	- $this->assertEqual(substr($data, 0, 1024), $stdout);
	+ $this->assertEqual(@substr($data, 0, 1024), $stdout);
	}

	public function testResolveTimeoutTestShouldRunLessThan1Sec() {
	@@ -159,7 +159,7 @@
	$bin,
	$input);

	- $stdout = explode("\n", $stdout);
	+ $stdout = @explode("\n", $stdout);
	$output = array();
	foreach ($stdout as $line) {
	$output[] = stripcslashes($line);
	@@ -185,7 +185,7 @@
	do {
	$future->isReady();
	list($read) = $future->read();
	- if (strlen($read)) {
	+ if (@strlen($read)) {
	break;
	}
	} while (true);
	@@ -204,7 +204,7 @@
	do {
	$future->isReady();
	list($read) = $future->read();
	- if (strlen($read)) {
	+ if (@strlen($read)) {
	break;
	}
	} while (true);
	diff --git a/src/future/github/PhutilGitHubFuture.php b/src/future/github/PhutilGitHubFuture.php
	--- a/src/future/github/PhutilGitHubFuture.php
	+++ b/src/future/github/PhutilGitHubFuture.php
	@@ -88,7 +88,7 @@
	}

	try {
	- if (strlen($body)) {
	+ if (@strlen($body)) {
	$data = phutil_json_decode($body);
	} else {
	// This can happen for 304 responses.
	diff --git a/src/future/http/BaseHTTPFuture.php b/src/future/http/BaseHTTPFuture.php
	--- a/src/future/http/BaseHTTPFuture.php
	+++ b/src/future/http/BaseHTTPFuture.php
	@@ -206,12 +206,12 @@
	* @task config
	*/
	public function getHeaders($filter = null) {
	- $filter = strtolower($filter);
	+ $filter = @strtolower($filter);

	$result = array();
	foreach ($this->headers as $header) {
	list($name, $value) = $header;
	- if (!$filter \|\| ($filter == strtolower($name))) {
	+ if (!$filter \|\| ($filter == @strtolower($name))) {
	$result[] = $header;
	}
	}
	@@ -270,10 +270,10 @@
	$data = $this->getData();

	if (is_scalar($data)) {
	- return strlen($data);
	+ return @strlen($data);
	}

	- return strlen(phutil_build_http_querystring($data));
	+ return @strlen(phutil_build_http_querystring($data));
	}

	public function setDisableContentDecoding($disable_decoding) {
	@@ -329,19 +329,19 @@
	$response = $raw_response;
	while (true) {
	$matches = null;
	- if (!preg_match($rex_base, $response, $matches)) {
	+ if (!@preg_match($rex_base, $response, $matches)) {
	return $this->buildMalformedResult($raw_response);
	}

	$head = $matches['head'];
	$body = $matches['body'];

	- if (!preg_match($rex_head, $head, $matches)) {
	+ if (!@preg_match($rex_head, $head, $matches)) {
	return $this->buildMalformedResult($raw_response);
	}

	$response_code = (int)$matches['code'];
	- $response_status = strtolower($matches['status']);
	+ $response_status = @strtolower($matches['status']);
	if ($response_code == 100) {
	// This is HTTP/1.X 100 Continue, so this whole chunk is moot.
	$response = $body;
	@@ -407,7 +407,7 @@
	$headers_raw = preg_split("/\r?\n/", $head_raw);
	foreach ($headers_raw as $header) {
	$m = null;
	- if (preg_match($rex_header, $header, $m)) {
	+ if (@preg_match($rex_header, $header, $m)) {
	$headers[] = array($m['name'], $m['value']);
	} else {
	$headers[] = array($header, null);
	diff --git a/src/future/http/HTTPFuture.php b/src/future/http/HTTPFuture.php
	--- a/src/future/http/HTTPFuture.php
	+++ b/src/future/http/HTTPFuture.php
	@@ -98,7 +98,7 @@
	}

	public function getWriteSockets() {
	- if (strlen($this->writeBuffer)) {
	+ if (@strlen($this->writeBuffer)) {
	return array($this->socket);
	}
	return array();
	@@ -136,20 +136,20 @@
	}

	if ($this->stateConnected) {
	- if (strlen($this->writeBuffer)) {
	+ if (@strlen($this->writeBuffer)) {
	$bytes = @fwrite($this->socket, $this->writeBuffer);
	if ($bytes === false) {
	throw new Exception(pht('Failed to write to buffer.'));
	} else if ($bytes) {
	- $this->writeBuffer = substr($this->writeBuffer, $bytes);
	+ $this->writeBuffer = @substr($this->writeBuffer, $bytes);
	}
	}

	- if (!strlen($this->writeBuffer)) {
	+ if (!@strlen($this->writeBuffer)) {
	$this->stateWriteComplete = true;
	}

	- while (($data = fread($this->socket, 32768)) \|\| strlen($data)) {
	+ while (($data = fread($this->socket, 32768)) \|\| @strlen($data)) {
	$this->response .= $data;
	}

	@@ -239,7 +239,7 @@
	if ($this->getMethod() == 'GET') {
	if (is_array($data)) {
	$data = phutil_build_http_querystring($data);
	- if (strpos($uri, '?') !== false) {
	+ if (@strpos($uri, '?') !== false) {
	$uri .= '&'.$data;
	} else {
	$uri .= '?'.$data;
	@@ -256,7 +256,7 @@
	}
	}

	- $length = strlen($data);
	+ $length = @strlen($data);

	$add_headers[] = array(
	'Content-Length',
	@@ -280,7 +280,7 @@
	$headers = array_merge($this->getHeaders(), $add_headers);
	foreach ($headers as $key => $header) {
	list($name, $value) = $header;
	- if (strlen($value)) {
	+ if (@strlen($value)) {
	$value = ': '.$value;
	}
	$headers[$key] = $name.$value."\r\n";
	diff --git a/src/future/http/HTTPSFuture.php b/src/future/http/HTTPSFuture.php
	--- a/src/future/http/HTTPSFuture.php
	+++ b/src/future/http/HTTPSFuture.php
	@@ -269,7 +269,7 @@
	curl_setopt($curl, CURLOPT_REDIR_PROTOCOLS, $allowed_protocols);
	}

	- if (strlen($this->rawBody)) {
	+ if (@strlen($this->rawBody)) {
	if ($this->getData()) {
	throw new Exception(
	pht(
	@@ -288,7 +288,7 @@
	// a PUT request.
	curl_setopt($curl, CURLOPT_PUT, true);
	curl_setopt($curl, CURLOPT_INFILE, $this->fileHandle);
	- curl_setopt($curl, CURLOPT_INFILESIZE, strlen($this->rawBody));
	+ curl_setopt($curl, CURLOPT_INFILESIZE, @strlen($this->rawBody));
	curl_setopt($curl, CURLOPT_READFUNCTION,
	array($this, 'willWriteBody'));
	} else {
	@@ -587,7 +587,7 @@
	$this->responseBuffer .= $data;
	}

	- return strlen($data);
	+ return @strlen($data);
	}


	@@ -616,8 +616,8 @@
	'parser.'));
	}

	- $result = substr($this->responseBuffer, $this->responseBufferPos);
	- $this->responseBufferPos = strlen($this->responseBuffer);
	+ $result = @substr($this->responseBuffer, $this->responseBufferPos);
	+ $this->responseBufferPos = @strlen($this->responseBuffer);
	return $result;
	}

	@@ -686,7 +686,7 @@
	$data = $this->getData();
	$files = $this->files;

	- $any_data = ($data \|\| (is_string($data) && strlen($data)));
	+ $any_data = ($data \|\| (is_string($data) && @strlen($data)));
	$any_files = (bool)$this->files;

	if (!$any_data && !$any_files) {
	@@ -841,7 +841,7 @@
	* Callback to pass data to cURL.
	*/
	public function willWriteBody($handle, $infile, $len) {
	- $bytes = substr($this->rawBody, $this->rawBodyPos, $len);
	+ $bytes = @substr($this->rawBody, $this->rawBodyPos, $len);
	$this->rawBodyPos += $len;
	return $bytes;
	}
	diff --git a/src/future/http/status/HTTPFutureCURLResponseStatus.php b/src/future/http/status/HTTPFutureCURLResponseStatus.php
	--- a/src/future/http/status/HTTPFutureCURLResponseStatus.php
	+++ b/src/future/http/status/HTTPFutureCURLResponseStatus.php
	@@ -25,7 +25,7 @@

	$constant_name = null;
	foreach ($constants as $constant => $value) {
	- if ($value == $code && preg_match('/^CURLE_/', $constant)) {
	+ if ($value == $code && @preg_match('/^CURLE_/', $constant)) {
	$constant_name = '<'.$constant.'> ';
	break;
	}
	diff --git a/src/future/http/status/HTTPFutureHTTPResponseStatus.php b/src/future/http/status/HTTPFutureHTTPResponseStatus.php
	--- a/src/future/http/status/HTTPFutureHTTPResponseStatus.php
	+++ b/src/future/http/status/HTTPFutureHTTPResponseStatus.php
	@@ -13,15 +13,15 @@

	// NOTE: Avoiding PhutilUTF8StringTruncator here because this isn't lazy
	// and responses may be large.
	- if (strlen($body) > 512) {
	- $excerpt = substr($body, 0, 512).'...';
	+ if (@strlen($body) > 512) {
	+ $excerpt = @substr($body, 0, 512).'...';
	} else {
	$excerpt = $body;
	}

	$content_type = BaseHTTPFuture::getHeader($headers, 'Content-Type');
	$match = null;
	- if (preg_match('/;\s*charset=([^;]+)/', $content_type, $match)) {
	+ if (@preg_match('/;\s*charset=([^;]+)/', $content_type, $match)) {
	$encoding = trim($match[1], "\"'");
	try {
	$excerpt = phutil_utf8_convert($excerpt, 'UTF-8', $encoding);
	diff --git a/src/hardpoint/ArcanistHardpointList.php b/src/hardpoint/ArcanistHardpointList.php
	--- a/src/hardpoint/ArcanistHardpointList.php
	+++ b/src/hardpoint/ArcanistHardpointList.php
	@@ -14,7 +14,7 @@
	foreach ($hardpoints as $idx => $hardpoint) {
	$key = $hardpoint->getHardpointKey();

	- if (!strlen($key)) {
	+ if (!@strlen($key)) {
	throw new Exception(
	pht(
	'Hardpoint (at index "%s") has no hardpoint key. Each hardpoint '.
	diff --git a/src/hgdaemon/ArcanistHgClientChannel.php b/src/hgdaemon/ArcanistHgClientChannel.php
	--- a/src/hgdaemon/ArcanistHgClientChannel.php
	+++ b/src/hgdaemon/ArcanistHgClientChannel.php
	@@ -63,7 +63,7 @@
	$channel = head($argv);
	$data = last($argv);

	- $len = strlen($data);
	+ $len = @strlen($data);
	$len = pack('N', $len);

	return "{$channel}{$len}{$data}";
	@@ -109,13 +109,13 @@
	// We're looking for "\n", which indicates the end of the command
	// name, like "runcommand". Next, we'll expect a length.

	- $pos = strpos($this->buf, "\n");
	+ $pos = @strpos($this->buf, "\n");
	if ($pos === false) {
	break;
	}

	- $this->command = substr($this->buf, 0, $pos);
	- $this->buf = substr($this->buf, $pos + 1);
	+ $this->command = @substr($this->buf, 0, $pos);
	+ $this->buf = @substr($this->buf, $pos + 1);
	$this->mode = self::MODE_LENGTH;

	$continue_parsing = true;
	@@ -124,15 +124,15 @@
	// We're looking for a byte length, as a 4-byte big-endian unsigned
	// integer. Next, we'll expect that many bytes of data.

	- if (strlen($this->buf) < 4) {
	+ if (@strlen($this->buf) < 4) {
	break;
	}

	- $len = substr($this->buf, 0, 4);
	+ $len = @substr($this->buf, 0, 4);
	$len = unpack('N', $len);
	$len = head($len);

	- $this->buf = substr($this->buf, 4);
	+ $this->buf = @substr($this->buf, 4);

	$this->mode = self::MODE_ARGUMENTS;
	$this->byteLengthOfNextChunk = $len;
	@@ -144,14 +144,14 @@
	// of the given length. These are arguments delimited by "\0". Next
	// we'll expect another command.

	- if (strlen($this->buf) < $this->byteLengthOfNextChunk) {
	+ if (@strlen($this->buf) < $this->byteLengthOfNextChunk) {
	break;
	}

	- $data = substr($this->buf, 0, $this->byteLengthOfNextChunk);
	- $this->buf = substr($this->buf, $this->byteLengthOfNextChunk);
	+ $data = @substr($this->buf, 0, $this->byteLengthOfNextChunk);
	+ $this->buf = @substr($this->buf, $this->byteLengthOfNextChunk);

	- $message = array_merge(array($this->command), explode("\0", $data));
	+ $message = array_merge(array($this->command), @explode("\0", $data));

	$this->mode = self::MODE_COMMAND;
	$this->command = null;
	diff --git a/src/hgdaemon/ArcanistHgServerChannel.php b/src/hgdaemon/ArcanistHgServerChannel.php
	--- a/src/hgdaemon/ArcanistHgServerChannel.php
	+++ b/src/hgdaemon/ArcanistHgServerChannel.php
	@@ -96,7 +96,7 @@

	$args = implode("\0", $args);

	- $len = strlen($args);
	+ $len = @strlen($args);
	$len = pack('N', $len);

	return "{$command}\n{$len}{$args}";
	@@ -128,9 +128,9 @@
	// easy to implement.

	$messages = array();
	- while ($this->byteLengthOfNextChunk <= strlen($this->buf)) {
	- $chunk = substr($this->buf, 0, $this->byteLengthOfNextChunk);
	- $this->buf = substr($this->buf, $this->byteLengthOfNextChunk);
	+ while ($this->byteLengthOfNextChunk <= @strlen($this->buf)) {
	+ $chunk = @substr($this->buf, 0, $this->byteLengthOfNextChunk);
	+ $this->buf = @substr($this->buf, $this->byteLengthOfNextChunk);

	switch ($this->mode) {
	case self::MODE_CHANNEL:
	diff --git a/src/ip/PhutilCIDRBlock.php b/src/ip/PhutilCIDRBlock.php
	--- a/src/ip/PhutilCIDRBlock.php
	+++ b/src/ip/PhutilCIDRBlock.php
	@@ -23,7 +23,7 @@
	}

	private static function newFromString($str) {
	- if (!preg_match('(^[\d.:a-fA-F]+/[\d]+\z)', $str)) {
	+ if (!@preg_match('(^[\d.:a-fA-F]+/[\d]+\z)', $str)) {
	throw new Exception(
	pht(
	'CIDR block "%s" is not formatted correctly. Expected an IP block '.
	@@ -33,11 +33,11 @@
	'23:45:67:89::/24'));
	}

	- list($ip, $mask) = explode('/', $str);
	+ list($ip, $mask) = @explode('/', $str);

	$ip = PhutilIPAddress::newAddress($ip);

	- if (preg_match('/^0\d/', $mask)) {
	+ if (@preg_match('/^0\d/', $mask)) {
	throw new Exception(
	pht(
	'CIDR block "%s" is not formatted correctly. The IP block mask '.
	diff --git a/src/ip/PhutilIPv4Address.php b/src/ip/PhutilIPv4Address.php
	--- a/src/ip/PhutilIPv4Address.php
	+++ b/src/ip/PhutilIPv4Address.php
	@@ -22,7 +22,7 @@

	protected static function newFromString($str) {
	$matches = null;
	- $ok = preg_match('(^(\d+)\.(\d+)\.(\d+).(\d+)\z)', $str, $matches);
	+ $ok = @preg_match('(^(\d+)\.(\d+)\.(\d+).(\d+)\z)', $str, $matches);
	if (!$ok) {
	throw new Exception(
	pht(
	@@ -34,7 +34,7 @@

	$parts = array_slice($matches, 1);
	foreach ($parts as $part) {
	- if (preg_match('/^0\d/', $part)) {
	+ if (@preg_match('/^0\d/', $part)) {
	throw new Exception(
	pht(
	'IP address "%s" is not properly formatted. Address segments '.
	@@ -65,7 +65,7 @@
	public function toBits() {
	if ($this->bits === null) {
	$bits = '';
	- foreach (explode('.', $this->ip) as $part) {
	+ foreach (@explode('.', $this->ip) as $part) {
	$value = (int)$part;
	for ($ii = 7; $ii >= 0; $ii--) {
	$mask = (1 << $ii);
	diff --git a/src/ip/PhutilIPv6Address.php b/src/ip/PhutilIPv6Address.php
	--- a/src/ip/PhutilIPv6Address.php
	+++ b/src/ip/PhutilIPv6Address.php
	@@ -18,7 +18,7 @@
	}

	protected static function newFromString($str) {
	- $parts = explode(':', $str);
	+ $parts = @explode(':', $str);
	if (count($parts) > 8) {
	throw new Exception(
	pht(
	@@ -109,7 +109,7 @@
	continue;
	}

	- if (!preg_match('/^[0-9a-fA-F]{1,4}\z/', $part)) {
	+ if (!@preg_match('/^[0-9a-fA-F]{1,4}\z/', $part)) {
	throw new Exception(
	pht(
	'IP address "%s" is not properly formatted: the segments of '.
	diff --git a/src/land/engine/ArcanistGitLandEngine.php b/src/land/engine/ArcanistGitLandEngine.php
	--- a/src/land/engine/ArcanistGitLandEngine.php
	+++ b/src/land/engine/ArcanistGitLandEngine.php
	@@ -72,12 +72,12 @@
	$foreach_lines = phutil_split_lines($foreach_lines, false);

	foreach ($foreach_lines as $line) {
	- if (!strlen($line)) {
	+ if (!@strlen($line)) {
	continue;
	}

	$expect_parts = 2;
	- $parts = explode(' ', $line, $expect_parts);
	+ $parts = @explode(' ', $line, $expect_parts);
	if (count($parts) !== $expect_parts) {
	throw new Exception(
	pht(
	@@ -89,7 +89,7 @@
	$ref_hash = $parts[1];

	$matches = null;
	- $ok = preg_match('(^refs/heads/(.*)\z)', $ref_name, $matches);
	+ $ok = @preg_match('(^refs/heads/(.*)\z)', $ref_name, $matches);
	if ($ok === false) {
	throw new Exception(
	pht(
	@@ -280,7 +280,7 @@
	$into_commit,
	$max_hash));
	$changes = trim($changes);
	- if (!strlen($changes)) {
	+ if (!@strlen($changes)) {

	// TODO: We could make a more significant effort to identify the
	// human-readable symbol which led us to try to land this ref.
	@@ -877,7 +877,7 @@
	gitsprintf('%s', $commit));

	$info = trim($info);
	- list($date, $author, $email) = explode("\n", $info, 3);
	+ list($date, $author, $email) = @explode("\n", $info, 3);

	return array(
	"$author <{$email}>",
	@@ -966,7 +966,7 @@
	$api = $this->getRepositoryAPI();

	foreach ($onto_refs as $onto_ref) {
	- if (!strlen($onto_ref)) {
	+ if (!@strlen($onto_ref)) {
	throw new PhutilArgumentUsageException(
	pht(
	'Selected "onto" ref "%s" is invalid: the empty string is not '.
	@@ -1563,11 +1563,11 @@
	$commits = phutil_split_lines($commits, false);
	$is_first = true;
	foreach ($commits as $line) {
	- if (!strlen($line)) {
	+ if (!@strlen($line)) {
	continue;
	}

	- $parts = explode("\0", $line, 4);
	+ $parts = @explode("\0", $line, 4);
	if (count($parts) < 3) {
	throw new Exception(
	pht(
	@@ -1579,8 +1579,8 @@
	if (!isset($commit_map[$hash])) {
	$parents = $parts[1];
	$parents = trim($parents);
	- if (strlen($parents)) {
	- $parents = explode(' ', $parents);
	+ if (@strlen($parents)) {
	+ $parents = @explode(' ', $parents);
	} else {
	$parents = array();
	}
	diff --git a/src/land/engine/ArcanistMercurialLandEngine.php b/src/land/engine/ArcanistMercurialLandEngine.php
	--- a/src/land/engine/ArcanistMercurialLandEngine.php
	+++ b/src/land/engine/ArcanistMercurialLandEngine.php
	@@ -261,7 +261,7 @@
	$api = $this->getRepositoryAPI();

	foreach ($onto_refs as $onto_ref) {
	- if (!strlen($onto_ref)) {
	+ if (!@strlen($onto_ref)) {
	throw new PhutilArgumentUsageException(
	pht(
	'Selected "onto" ref "%s" is invalid: the empty string is not '.
	@@ -718,11 +718,11 @@
	$commits = phutil_split_lines($commits, false);
	$is_first = true;
	foreach ($commits as $line) {
	- if (!strlen($line)) {
	+ if (!@strlen($line)) {
	continue;
	}

	- $parts = explode('-', $line, 3);
	+ $parts = @explode('-', $line, 3);
	if (count($parts) < 3) {
	throw new Exception(
	pht(
	@@ -734,8 +734,8 @@
	if (!isset($commit_map[$hash])) {
	$parents = $parts[1];
	$parents = trim($parents);
	- if (strlen($parents)) {
	- $parents = explode(' ', $parents);
	+ if (@strlen($parents)) {
	+ $parents = @explode(' ', $parents);
	} else {
	$parents = array();
	}
	@@ -1007,7 +1007,7 @@
	$child_hashes = phutil_split_lines($output, false);

	foreach ($child_hashes as $child_hash) {
	- if (!strlen($child_hash)) {
	+ if (!@strlen($child_hash)) {
	continue;
	}

	diff --git a/src/lexer/PhutilLexer.php b/src/lexer/PhutilLexer.php
	--- a/src/lexer/PhutilLexer.php
	+++ b/src/lexer/PhutilLexer.php
	@@ -192,7 +192,7 @@
	// NOTE: The "\G" assertion is an offset-aware version of "^".
	$rule[0] = '(\\G'.$rule[0].')'.$flags;

	- if (@preg_match($rule[0], '') === false) {
	+ if (@@preg_match($rule[0], '') === false) {
	$error = error_get_last();
	throw new UnexpectedValueException(
	pht(
	@@ -247,7 +247,7 @@
	$this->lastState = null;

	$position = 0;
	- $length = strlen($input);
	+ $length = @strlen($input);

	$tokens = array();
	$states = array();
	@@ -261,13 +261,13 @@
	foreach ($state_rules as $rule) {

	$matches = null;
	- if (!preg_match($rule[0], $input, $matches, 0, $position)) {
	+ if (!@preg_match($rule[0], $input, $matches, 0, $position)) {
	continue;
	}

	list($regexp, $token_type, $next_state, $options) = $rule;

	- $match_length = strlen($matches[0]);
	+ $match_length = @strlen($matches[0]);
	if (!$match_length) {
	if ($next_state === null) {
	throw new UnexpectedValueException(
	diff --git a/src/lexer/PhutilShellLexer.php b/src/lexer/PhutilShellLexer.php
	--- a/src/lexer/PhutilShellLexer.php
	+++ b/src/lexer/PhutilShellLexer.php
	@@ -39,7 +39,7 @@
	break;
	case 'esc':
	$tokens[$key][0] = 'arg';
	- $tokens[$key][1] = substr($token[1], 1);
	+ $tokens[$key][1] = @substr($token[1], 1);
	break;
	default:
	break;
	diff --git a/src/lexer/PhutilSimpleOptionsLexer.php b/src/lexer/PhutilSimpleOptionsLexer.php
	--- a/src/lexer/PhutilSimpleOptionsLexer.php
	+++ b/src/lexer/PhutilSimpleOptionsLexer.php
	@@ -19,7 +19,7 @@
	switch ($type) {
	case 'esc':
	$tokens[$key][0] = 'word';
	- $tokens[$key][1] = substr($value, 1);
	+ $tokens[$key][1] = @substr($value, 1);
	break;
	}
	}
	diff --git a/src/lint/ArcanistLintMessage.php b/src/lint/ArcanistLintMessage.php
	--- a/src/lint/ArcanistLintMessage.php
	+++ b/src/lint/ArcanistLintMessage.php
	@@ -101,7 +101,7 @@
	$code = (string)$code;

	$maximum_bytes = 128;
	- $actual_bytes = strlen($code);
	+ $actual_bytes = @strlen($code);

	if ($actual_bytes > $maximum_bytes) {
	throw new Exception(
	@@ -134,7 +134,7 @@

	public function setName($name) {
	$maximum_bytes = 255;
	- $actual_bytes = strlen($name);
	+ $actual_bytes = @strlen($name);

	if ($actual_bytes > $maximum_bytes) {
	throw new Exception(
	@@ -282,7 +282,7 @@
	}

	// Strings like "234" are fine, coerce them to integers.
	- if (is_string($value) && preg_match('/^\d+\z/', $value)) {
	+ if (is_string($value) && @preg_match('/^\d+\z/', $value)) {
	$value = (int)$value;
	}

	@@ -307,8 +307,8 @@
	$replacement = $this->getReplacementText();
	$original = $this->getOriginalText();

	- $replacement_length = strlen($replacement);
	- $original_length = strlen($original);
	+ $replacement_length = @strlen($replacement);
	+ $original_length = @strlen($original);

	$minimum_length = min($original_length, $replacement_length);

	@@ -340,21 +340,21 @@
	}

	if ($suffix_length) {
	- $original = substr($original, 0, -$suffix_length);
	- $replacement = substr($replacement, 0, -$suffix_length);
	+ $original = @substr($original, 0, -$suffix_length);
	+ $replacement = @substr($replacement, 0, -$suffix_length);
	}

	$line = $this->getLine();
	$char = $this->getChar();

	if ($prefix_length) {
	- $prefix = substr($original, 0, $prefix_length);
	+ $prefix = @substr($original, 0, $prefix_length);

	- // NOTE: Prior to PHP7, `substr("a", 1)` returned false instead of
	+ // NOTE: Prior to PHP7, `@substr("a", 1)` returned false instead of
	// the empty string. Cast these to force the PHP7-ish behavior we
	// expect.
	- $original = (string)substr($original, $prefix_length);
	- $replacement = (string)substr($replacement, $prefix_length);
	+ $original = (string)@substr($original, $prefix_length);
	+ $replacement = (string)@substr($replacement, $prefix_length);

	// If we've removed a prefix, we need to push the character and line
	// number for the warning forward to account for the characters we threw
	diff --git a/src/lint/ArcanistLintPatcher.php b/src/lint/ArcanistLintPatcher.php
	--- a/src/lint/ArcanistLintPatcher.php
	+++ b/src/lint/ArcanistLintPatcher.php
	@@ -85,11 +85,11 @@
	$working_offset = $orig_offset + $this->getCharacterDelta();

	$old_str = $lint->getOriginalText();
	- $old_len = strlen($old_str);
	+ $old_len = @strlen($old_str);
	$new_str = $lint->getReplacementText();
	- $new_len = strlen($new_str);
	+ $new_len = @strlen($new_str);

	- if ($working_offset == strlen($data)) {
	+ if ($working_offset == @strlen($data)) {
	// Temporary hack to work around a destructive hphpi issue, see #451031.
	$data .= $new_str;
	} else {
	@@ -107,12 +107,12 @@

	private function getCharacterOffset($line_num) {
	if ($this->lineOffsets === null) {
	- $lines = explode("\n", $this->getUnmodifiedFileContent());
	+ $lines = @explode("\n", $this->getUnmodifiedFileContent());
	$this->lineOffsets = array(0);
	$last = 0;
	foreach ($lines as $line) {
	- $this->lineOffsets[] = $last + strlen($line) + 1;
	- $last += strlen($line) + 1;
	+ $this->lineOffsets[] = $last + @strlen($line) + 1;
	+ $last += @strlen($line) + 1;
	}
	}

	diff --git a/src/lint/engine/ArcanistComprehensiveLintEngine.php b/src/lint/engine/ArcanistComprehensiveLintEngine.php
	--- a/src/lint/engine/ArcanistComprehensiveLintEngine.php
	+++ b/src/lint/engine/ArcanistComprehensiveLintEngine.php
	@@ -11,7 +11,7 @@
	$paths = $this->getPaths();

	foreach ($paths as $key => $path) {
	- if (preg_match('@^externals/@', $path)) {
	+ if (@preg_match('@^externals/@', $path)) {
	// Third-party stuff lives in /externals/; don't run lint engines
	// against it.
	unset($paths[$key]);
	diff --git a/src/lint/engine/ArcanistConfigurationDrivenLintEngine.php b/src/lint/engine/ArcanistConfigurationDrivenLintEngine.php
	--- a/src/lint/engine/ArcanistConfigurationDrivenLintEngine.php
	+++ b/src/lint/engine/ArcanistConfigurationDrivenLintEngine.php
	@@ -158,7 +158,7 @@
	$keep = true;
	} else {
	foreach ($include as $rule) {
	- if (preg_match($rule, $path)) {
	+ if (@preg_match($rule, $path)) {
	$keep = true;
	break;
	}
	@@ -171,7 +171,7 @@

	if ($exclude) {
	foreach ($exclude as $rule) {
	- if (preg_match($rule, $path)) {
	+ if (@preg_match($rule, $path)) {
	continue 2;
	}
	}
	@@ -179,7 +179,7 @@

	if ($global_exclude) {
	foreach ($global_exclude as $rule) {
	- if (preg_match($rule, $path)) {
	+ if (@preg_match($rule, $path)) {
	continue 2;
	}
	}
	diff --git a/src/lint/engine/ArcanistLintEngine.php b/src/lint/engine/ArcanistLintEngine.php
	--- a/src/lint/engine/ArcanistLintEngine.php
	+++ b/src/lint/engine/ArcanistLintEngine.php
	@@ -383,11 +383,11 @@
	$char_to_line = array();
	$line_to_first_char = array();

	- $lines = explode("\n", $this->loadData($path));
	+ $lines = @explode("\n", $this->loadData($path));
	$line_number = 0;
	$line_start = 0;
	foreach ($lines as $line) {
	- $len = strlen($line) + 1; // Account for "\n".
	+ $len = @strlen($line) + 1; // Account for "\n".
	$line_to_first_char[] = $line_start;
	$line_start += $len;
	for ($ii = 0; $ii < $len; $ii++) {
	@@ -606,7 +606,7 @@
	ArcanistLintMessage $message) {

	$name = $message->getName();
	- if (!strlen($name)) {
	+ if (!@strlen($name)) {
	throw new Exception(
	pht(
	'Linter "%s" generated a lint message that is invalid because it '.
	diff --git a/src/lint/linter/ArcanistBaseXHPASTLinter.php b/src/lint/linter/ArcanistBaseXHPASTLinter.php
	--- a/src/lint/linter/ArcanistBaseXHPASTLinter.php
	+++ b/src/lint/linter/ArcanistBaseXHPASTLinter.php
	@@ -219,7 +219,7 @@

	foreach ($calls as $call) {
	$node = $call->getChildByIndex(0);
	- $name = strtolower($node->getConcreteString());
	+ $name = @strtolower($node->getConcreteString());

	if (in_array($name, $function_names)) {
	$nodes[] = $call;
	diff --git a/src/lint/linter/ArcanistCSSLintLinter.php b/src/lint/linter/ArcanistCSSLintLinter.php
	--- a/src/lint/linter/ArcanistCSSLintLinter.php
	+++ b/src/lint/linter/ArcanistCSSLintLinter.php
	@@ -41,7 +41,7 @@
	list($stdout) = execx('%C --version', $this->getExecutableCommand());

	$matches = array();
	- if (preg_match('/^v(?P<version>\d+\.\d+\.\d+)$/', $stdout, $matches)) {
	+ if (@preg_match('/^v(?P<version>\d+\.\d+\.\d+)$/', $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -78,7 +78,7 @@
	if ($char === '') {
	$char = null;
	} else {
	- $original_text = substr($original_text, $char - 1);
	+ $original_text = @substr($original_text, $char - 1);
	}

	$message = id(new ArcanistLintMessage())
	diff --git a/src/lint/linter/ArcanistCSharpLinter.php b/src/lint/linter/ArcanistCSharpLinter.php
	--- a/src/lint/linter/ArcanistCSharpLinter.php
	+++ b/src/lint/linter/ArcanistCSharpLinter.php
	@@ -60,7 +60,7 @@

	public function setCustomSeverityMap(array $map) {
	foreach ($map as $code => $severity) {
	- if (substr($code, 0, 2) === 'SA' && $severity == 'disabled') {
	+ if (@substr($code, 0, 2) === 'SA' && $severity == 'disabled') {
	throw new Exception(
	pht(
	"In order to keep StyleCop integration with IDEs and other tools ".
	@@ -157,9 +157,9 @@
	// command line limit), then finalize this future and add it.
	$total = 0;
	foreach ($current_paths as $current_path) {
	- $total += strlen($current_path) + 3; // Quotes and space.
	+ $total += @strlen($current_path) + 3; // Quotes and space.
	}
	- if ($total + strlen($path) > 6000) {
	+ if ($total + @strlen($path) > 6000) {
	// %s won't pass through the JSON correctly
	// under Windows. This is probably because not only
	// does the JSON have quotation marks in the content,
	diff --git a/src/lint/linter/ArcanistChmodLinter.php b/src/lint/linter/ArcanistChmodLinter.php
	--- a/src/lint/linter/ArcanistChmodLinter.php
	+++ b/src/lint/linter/ArcanistChmodLinter.php
	@@ -124,7 +124,7 @@
	$line = head(phutil_split_lines($this->getEngine()->loadData($path), true));

	$matches = array();
	- if (preg_match('/^#!(.*)$/', $line, $matches)) {
	+ if (@preg_match('/^#!(.*)$/', $line, $matches)) {
	return $matches[1];
	} else {
	return null;
	diff --git a/src/lint/linter/ArcanistClosureLinter.php b/src/lint/linter/ArcanistClosureLinter.php
	--- a/src/lint/linter/ArcanistClosureLinter.php
	+++ b/src/lint/linter/ArcanistClosureLinter.php
	@@ -42,7 +42,7 @@

	foreach ($lines as $line) {
	$matches = null;
	- if (!preg_match('/^Line (\d+), E:(\d+): (.*)/', $line, $matches)) {
	+ if (!@preg_match('/^Line (\d+), E:(\d+): (.*)/', $line, $matches)) {
	continue;
	}

	diff --git a/src/lint/linter/ArcanistCoffeeLintLinter.php b/src/lint/linter/ArcanistCoffeeLintLinter.php
	--- a/src/lint/linter/ArcanistCoffeeLintLinter.php
	+++ b/src/lint/linter/ArcanistCoffeeLintLinter.php
	@@ -34,7 +34,7 @@
	list($stdout) = execx('%C --version', $this->getExecutableCommand());

	$matches = array();
	- if (preg_match('/^(?P<version>\d+\.\d+\.\d+)$/', $stdout, $matches)) {
	+ if (@preg_match('/^(?P<version>\d+\.\d+\.\d+)$/', $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	diff --git a/src/lint/linter/ArcanistCppcheckLinter.php b/src/lint/linter/ArcanistCppcheckLinter.php
	--- a/src/lint/linter/ArcanistCppcheckLinter.php
	+++ b/src/lint/linter/ArcanistCppcheckLinter.php
	@@ -36,7 +36,7 @@

	$matches = array();
	$regex = '/^Cppcheck (?P<version>\d+\.\d+)$/';
	- if (preg_match($regex, $stdout, $matches)) {
	+ if (@preg_match($regex, $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	diff --git a/src/lint/linter/ArcanistCpplintLinter.php b/src/lint/linter/ArcanistCpplintLinter.php
	--- a/src/lint/linter/ArcanistCpplintLinter.php
	+++ b/src/lint/linter/ArcanistCpplintLinter.php
	@@ -30,14 +30,14 @@
	}

	protected function parseLinterOutput($path, $err, $stdout, $stderr) {
	- $lines = explode("\n", $stderr);
	+ $lines = @explode("\n", $stderr);

	$messages = array();
	foreach ($lines as $line) {
	$line = trim($line);
	$matches = null;
	$regex = '/(\d+):\s(.)\s\[(.)\] \[(\d+)\]$/';
	- if (!preg_match($regex, $line, $matches)) {
	+ if (!@preg_match($regex, $line, $matches)) {
	continue;
	}
	foreach ($matches as $key => $match) {
	@@ -71,7 +71,7 @@
	}

	protected function getLintCodeFromLinterConfigurationKey($code) {
	- if (!preg_match('@^[a-z_]+/[a-z0-9_+]+$@', $code)) {
	+ if (!@preg_match('@^[a-z_]+/[a-z0-9_+]+$@', $code)) {
	throw new Exception(
	pht(
	'Unrecognized lint message code "%s". Expected a valid cpplint '.
	diff --git a/src/lint/linter/ArcanistExternalLinter.php b/src/lint/linter/ArcanistExternalLinter.php
	--- a/src/lint/linter/ArcanistExternalLinter.php
	+++ b/src/lint/linter/ArcanistExternalLinter.php
	@@ -314,7 +314,7 @@
	$compare_to = $this->versionRequirement;

	$matches = null;
	- if (preg_match('/^([<>]=?\|=)\s(.)$/', $compare_to, $matches)) {
	+ if (@preg_match('/^([<>]=?\|=)\s(.)$/', $compare_to, $matches)) {
	$operator = $matches[1];
	$compare_to = $matches[2];
	if ($operator === '=') {
	diff --git a/src/lint/linter/ArcanistFilenameLinter.php b/src/lint/linter/ArcanistFilenameLinter.php
	--- a/src/lint/linter/ArcanistFilenameLinter.php
	+++ b/src/lint/linter/ArcanistFilenameLinter.php
	@@ -36,7 +36,7 @@
	}

	public function lintPath($path) {
	- if (!preg_match('@^[a-z0-9./\\\\_-]+$@i', $path)) {
	+ if (!@preg_match('@^[a-z0-9./\\\\_-]+$@i', $path)) {
	$this->raiseLintAtPath(
	self::LINT_BAD_FILENAME,
	pht(
	diff --git a/src/lint/linter/ArcanistFlake8Linter.php b/src/lint/linter/ArcanistFlake8Linter.php
	--- a/src/lint/linter/ArcanistFlake8Linter.php
	+++ b/src/lint/linter/ArcanistFlake8Linter.php
	@@ -37,7 +37,7 @@
	list($stdout) = execx('%C --version', $this->getExecutableCommand());

	$matches = array();
	- if (preg_match('/^(?P<version>\d+\.\d+(?:\.\d+)?)\b/', $stdout, $matches)) {
	+ if (@preg_match('/^(?P<version>\d+\.\d+(?:\.\d+)?)\b/', $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -59,7 +59,7 @@
	$messages = array();
	foreach ($lines as $line) {
	$matches = null;
	- if (!preg_match($regexp, $line, $matches)) {
	+ if (!@preg_match($regexp, $line, $matches)) {
	continue;
	}
	foreach ($matches as $key => $match) {
	@@ -84,10 +84,10 @@
	}

	protected function getDefaultMessageSeverity($code) {
	- if (preg_match('/^C/', $code)) {
	+ if (@preg_match('/^C/', $code)) {
	// "C": Cyclomatic complexity
	return ArcanistLintSeverity::SEVERITY_ADVICE;
	- } else if (preg_match('/^W/', $code)) {
	+ } else if (@preg_match('/^W/', $code)) {
	// "W": PEP8 Warning
	return ArcanistLintSeverity::SEVERITY_WARNING;
	} else {
	@@ -99,7 +99,7 @@
	}

	protected function getLintCodeFromLinterConfigurationKey($code) {
	- if (!preg_match('/^[A-Z]\d+$/', $code)) {
	+ if (!@preg_match('/^[A-Z]\d+$/', $code)) {
	throw new Exception(
	pht(
	'Unrecognized lint message code "%s". Expected a valid flake8 '.
	diff --git a/src/lint/linter/ArcanistGeneratedLinter.php b/src/lint/linter/ArcanistGeneratedLinter.php
	--- a/src/lint/linter/ArcanistGeneratedLinter.php
	+++ b/src/lint/linter/ArcanistGeneratedLinter.php
	@@ -34,7 +34,7 @@

	public function lintPath($path) {
	$data = $this->getData($path);
	- if (preg_match('/@'.'generated/', $data)) {
	+ if (@preg_match('/@'.'generated/', $data)) {
	$this->stopAllLinters();
	}
	}
	diff --git a/src/lint/linter/ArcanistGoLintLinter.php b/src/lint/linter/ArcanistGoLintLinter.php
	--- a/src/lint/linter/ArcanistGoLintLinter.php
	+++ b/src/lint/linter/ArcanistGoLintLinter.php
	@@ -45,7 +45,7 @@

	$messages = array();
	foreach ($lines as $line) {
	- $matches = explode(':', $line, 4);
	+ $matches = @explode(':', $line, 4);

	if (count($matches) === 4) {
	$message = new ArcanistLintMessage();
	diff --git a/src/lint/linter/ArcanistHLintLinter.php b/src/lint/linter/ArcanistHLintLinter.php
	--- a/src/lint/linter/ArcanistHLintLinter.php
	+++ b/src/lint/linter/ArcanistHLintLinter.php
	@@ -42,7 +42,7 @@
	'%C --version', $this->getExecutableCommand());

	$matches = null;
	- if (preg_match('@HLint v(.*),@', $stdout, $matches)) {
	+ if (@preg_match('@HLint v(.*),@', $stdout, $matches)) {
	return $matches[1];
	}

	diff --git a/src/lint/linter/ArcanistInlineHTMLXHPASTLinterRule.php b/src/lint/linter/ArcanistInlineHTMLXHPASTLinterRule.php
	--- a/src/lint/linter/ArcanistInlineHTMLXHPASTLinterRule.php
	+++ b/src/lint/linter/ArcanistInlineHTMLXHPASTLinterRule.php
	@@ -17,12 +17,12 @@
	$inline_html = $root->selectTokensOfType('T_INLINE_HTML');

	foreach ($inline_html as $html) {
	- if (substr($html->getValue(), 0, 2) == '#!') {
	+ if (@substr($html->getValue(), 0, 2) == '#!') {
	// Ignore shebang lines.
	continue;
	}

	- if (preg_match('/^\s*$/', $html->getValue())) {
	+ if (@preg_match('/^\s*$/', $html->getValue())) {
	continue;
	}

	diff --git a/src/lint/linter/ArcanistJSHintLinter.php b/src/lint/linter/ArcanistJSHintLinter.php
	--- a/src/lint/linter/ArcanistJSHintLinter.php
	+++ b/src/lint/linter/ArcanistJSHintLinter.php
	@@ -31,9 +31,9 @@
	}

	protected function getDefaultMessageSeverity($code) {
	- if (preg_match('/^W/', $code)) {
	+ if (@preg_match('/^W/', $code)) {
	return ArcanistLintSeverity::SEVERITY_WARNING;
	- } else if (preg_match('/^E043$/', $code)) {
	+ } else if (@preg_match('/^E043$/', $code)) {
	// TODO: If JSHint encounters a large number of errors, it will quit
	// prematurely and add an additional "Too Many Errors" error. Ideally, we
	// should be able to pass some sort of `--force` option to `jshint`.
	@@ -57,7 +57,7 @@

	$matches = array();
	$regex = '/^jshint v(?P<version>\d+\.\d+\.\d+)$/';
	- if (preg_match($regex, $stderr, $matches)) {
	+ if (@preg_match($regex, $stderr, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -142,7 +142,7 @@
	}

	protected function getLintCodeFromLinterConfigurationKey($code) {
	- if (!preg_match('/^(E\|W)\d+$/', $code)) {
	+ if (!@preg_match('/^(E\|W)\d+$/', $code)) {
	throw new Exception(
	pht(
	'Unrecognized lint message code "%s". Expected a valid JSHint '.
	diff --git a/src/lint/linter/ArcanistJSONLintLinter.php b/src/lint/linter/ArcanistJSONLintLinter.php
	--- a/src/lint/linter/ArcanistJSONLintLinter.php
	+++ b/src/lint/linter/ArcanistJSONLintLinter.php
	@@ -36,7 +36,7 @@
	$this->getExecutableCommand());

	$matches = array();
	- if (preg_match('/^(?P<version>\d+\.\d+\.\d+)$/', $stdout, $matches)) {
	+ if (@preg_match('/^(?P<version>\d+\.\d+\.\d+)$/', $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -59,7 +59,7 @@
	$messages = array();
	foreach ($lines as $line) {
	$matches = null;
	- $match = preg_match(
	+ $match = @preg_match(
	'/^(?:(?<path>.+): )?'.
	'line (?<line>\d+), col (?<column>\d+), '.
	'(?<description>.*)$/',
	diff --git a/src/lint/linter/ArcanistJscsLinter.php b/src/lint/linter/ArcanistJscsLinter.php
	--- a/src/lint/linter/ArcanistJscsLinter.php
	+++ b/src/lint/linter/ArcanistJscsLinter.php
	@@ -36,7 +36,7 @@

	$matches = array();
	$regex = '/^(?P<version>\d+\.\d+\.\d+)$/';
	- if (preg_match($regex, $stdout, $matches)) {
	+ if (@preg_match($regex, $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	diff --git a/src/lint/linter/ArcanistLesscLinter.php b/src/lint/linter/ArcanistLesscLinter.php
	--- a/src/lint/linter/ArcanistLesscLinter.php
	+++ b/src/lint/linter/ArcanistLesscLinter.php
	@@ -92,7 +92,7 @@

	$matches = array();
	$regex = '/^lessc (?P<version>\d+\.\d+\.\d+)\b/';
	- if (preg_match($regex, $stdout, $matches)) {
	+ if (@preg_match($regex, $stdout, $matches)) {
	$version = $matches['version'];
	} else {
	return false;
	@@ -118,7 +118,7 @@
	$messages = array();
	foreach ($lines as $line) {
	$matches = null;
	- $match = preg_match(
	+ $match = @preg_match(
	'/^(?P<name>\w+): (?P<description>.+) '.
	'in (?P<path>.+\|-) '.
	'on line (?P<line>\d+), column (?P<column>\d+):$/',
	diff --git a/src/lint/linter/ArcanistLinter.php b/src/lint/linter/ArcanistLinter.php
	--- a/src/lint/linter/ArcanistLinter.php
	+++ b/src/lint/linter/ArcanistLinter.php
	@@ -354,7 +354,7 @@
	}

	foreach ($this->customSeverityRules as $rule => $severity) {
	- if (preg_match($rule, $code)) {
	+ if (@preg_match($rule, $code)) {
	return $severity;
	}
	}
	@@ -550,7 +550,7 @@
	}

	foreach ($value as $rule => $severity) {
	- if (@preg_match($rule, '') === false) {
	+ if (@@preg_match($rule, '') === false) {
	throw new Exception(
	pht(
	'Severity rule "%s" is not a valid regular expression.',
	diff --git a/src/lint/linter/ArcanistMergeConflictLinter.php b/src/lint/linter/ArcanistMergeConflictLinter.php
	--- a/src/lint/linter/ArcanistMergeConflictLinter.php
	+++ b/src/lint/linter/ArcanistMergeConflictLinter.php
	@@ -37,7 +37,7 @@
	foreach ($lines as $lineno => $line) {
	// An unresolved merge conflict will contain a series of seven
	// '<', '=', or '>'.
	- if (preg_match('/^(>{7}\|<{7}\|={7})$/', $line)) {
	+ if (@preg_match('/^(>{7}\|<{7}\|={7})$/', $line)) {
	$this->raiseLintAtLine(
	$lineno + 1,
	1,
	diff --git a/src/lint/linter/ArcanistNoLintLinter.php b/src/lint/linter/ArcanistNoLintLinter.php
	--- a/src/lint/linter/ArcanistNoLintLinter.php
	+++ b/src/lint/linter/ArcanistNoLintLinter.php
	@@ -34,7 +34,7 @@

	public function lintPath($path) {
	$data = $this->getData($path);
	- if (preg_match('/@'.'nolint/', $data)) {
	+ if (@preg_match('/@'.'nolint/', $data)) {
	$this->stopAllLinters();
	}
	}
	diff --git a/src/lint/linter/ArcanistPEP8Linter.php b/src/lint/linter/ArcanistPEP8Linter.php
	--- a/src/lint/linter/ArcanistPEP8Linter.php
	+++ b/src/lint/linter/ArcanistPEP8Linter.php
	@@ -35,7 +35,7 @@
	list($stdout) = execx('%C --version', $this->getExecutableCommand());

	$matches = array();
	- if (preg_match('/^(?P<version>\d+\.\d+(?:\.\d+)?)\b/', $stdout, $matches)) {
	+ if (@preg_match('/^(?P<version>\d+\.\d+(?:\.\d+)?)\b/', $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -52,7 +52,7 @@
	$messages = array();
	foreach ($lines as $line) {
	$matches = null;
	- if (!preg_match('/^(.?):(\d+):(\d+): (\S+) (.)$/', $line, $matches)) {
	+ if (!@preg_match('/^(.?):(\d+):(\d+): (\S+) (.)$/', $line, $matches)) {
	continue;
	}
	foreach ($matches as $key => $match) {
	@@ -74,7 +74,7 @@
	}

	protected function getDefaultMessageSeverity($code) {
	- if (preg_match('/^W/', $code)) {
	+ if (@preg_match('/^W/', $code)) {
	return ArcanistLintSeverity::SEVERITY_WARNING;
	} else {
	return ArcanistLintSeverity::SEVERITY_ERROR;
	@@ -82,7 +82,7 @@
	}

	protected function getLintCodeFromLinterConfigurationKey($code) {
	- if (!preg_match('/^(E\|W)\d+$/', $code)) {
	+ if (!@preg_match('/^(E\|W)\d+$/', $code)) {
	throw new Exception(
	pht(
	'Unrecognized lint message code "%s". Expected a valid PEP8 '.
	diff --git a/src/lint/linter/ArcanistPhpLinter.php b/src/lint/linter/ArcanistPhpLinter.php
	--- a/src/lint/linter/ArcanistPhpLinter.php
	+++ b/src/lint/linter/ArcanistPhpLinter.php
	@@ -67,7 +67,7 @@

	$regex = '/^(PHP )?(?<type>.+) error: +(?<error>.+) in (?<file>.+) '.
	'on line (?<line>\d+)$/m';
	- if (preg_match($regex, $stdout, $matches)) {
	+ if (@preg_match($regex, $stdout, $matches)) {
	$code = $this->getLintCodeFromLinterConfigurationKey($matches['type']);

	$message = id(new ArcanistLintMessage())
	diff --git a/src/lint/linter/ArcanistPhpcsLinter.php b/src/lint/linter/ArcanistPhpcsLinter.php
	--- a/src/lint/linter/ArcanistPhpcsLinter.php
	+++ b/src/lint/linter/ArcanistPhpcsLinter.php
	@@ -74,7 +74,7 @@

	$matches = array();
	$regex = '/^PHP_CodeSniffer version (?P<version>\d+\.\d+\.\d+)\b/';
	- if (preg_match($regex, $stdout, $matches)) {
	+ if (@preg_match($regex, $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -129,7 +129,7 @@
	}

	protected function getDefaultMessageSeverity($code) {
	- if (preg_match('/^PHPCS\\.W\\./', $code)) {
	+ if (@preg_match('/^PHPCS\\.W\\./', $code)) {
	return ArcanistLintSeverity::SEVERITY_WARNING;
	} else {
	return ArcanistLintSeverity::SEVERITY_ERROR;
	@@ -137,7 +137,7 @@
	}

	protected function getLintCodeFromLinterConfigurationKey($code) {
	- if (!preg_match('/^PHPCS\\.(E\|W)\\./', $code)) {
	+ if (!@preg_match('/^PHPCS\\.(E\|W)\\./', $code)) {
	throw new Exception(
	pht(
	"Invalid severity code '%s', should begin with '%s.'.",
	diff --git a/src/lint/linter/ArcanistPuppetLintLinter.php b/src/lint/linter/ArcanistPuppetLintLinter.php
	--- a/src/lint/linter/ArcanistPuppetLintLinter.php
	+++ b/src/lint/linter/ArcanistPuppetLintLinter.php
	@@ -39,7 +39,7 @@

	$matches = array();
	$regex = '/^puppet-lint (?P<version>\d+\.\d+\.\d+)$/';
	- if (preg_match($regex, $stdout, $matches)) {
	+ if (@preg_match($regex, $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -102,7 +102,7 @@
	$messages = array();

	foreach ($lines as $line) {
	- $matches = explode('\|', $line, 5);
	+ $matches = @explode('\|', $line, 5);

	if (count($matches) < 5) {
	continue;
	diff --git a/src/lint/linter/ArcanistPyFlakesLinter.php b/src/lint/linter/ArcanistPyFlakesLinter.php
	--- a/src/lint/linter/ArcanistPyFlakesLinter.php
	+++ b/src/lint/linter/ArcanistPyFlakesLinter.php
	@@ -36,7 +36,7 @@

	$matches = array();
	$pattern = '/^(?P<version>\d+\.\d+\.\d+)( Python.*)?$/';
	- if (preg_match($pattern, $stdout, $matches)) {
	+ if (@preg_match($pattern, $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -54,7 +54,7 @@
	foreach ($lines as $line) {
	$matches = null;
	$pattern = '/^(?<path>.?):(?<line>\d+):(?<column>\d) (?<message>.*)$/';
	- if (!preg_match($pattern, $line, $matches)) {
	+ if (!@preg_match($pattern, $line, $matches)) {
	continue;
	}
	foreach ($matches as $key => $match) {
	@@ -65,7 +65,7 @@
	$description = $matches['message'];

	$error_regexp = '/(^undefined\|^duplicate\|before assignment$)/';
	- if (preg_match($error_regexp, $description)) {
	+ if (@preg_match($error_regexp, $description)) {
	$severity = ArcanistLintSeverity::SEVERITY_ERROR;
	}

	diff --git a/src/lint/linter/ArcanistPyLintLinter.php b/src/lint/linter/ArcanistPyLintLinter.php
	--- a/src/lint/linter/ArcanistPyLintLinter.php
	+++ b/src/lint/linter/ArcanistPyLintLinter.php
	@@ -39,7 +39,7 @@

	$matches = array();
	$regex = '/^pylint (?P<version>\d+\.\d+\.\d+)/';
	- if (preg_match($regex, $stdout, $matches)) {
	+ if (@preg_match($regex, $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -124,7 +124,7 @@
	$messages = array();

	foreach ($lines as $line) {
	- $matches = explode('\|', $line, 5);
	+ $matches = @explode('\|', $line, 5);

	if (count($matches) < 5) {
	continue;
	@@ -151,7 +151,7 @@
	}

	protected function getDefaultMessageSeverity($code) {
	- switch (substr($code, 0, 1)) {
	+ switch (@substr($code, 0, 1)) {
	case 'R':
	case 'C':
	return ArcanistLintSeverity::SEVERITY_ADVICE;
	@@ -166,7 +166,7 @@
	}

	protected function getLintCodeFromLinterConfigurationKey($code) {
	- if (!preg_match('/^(R\|C\|W\|E\|F)\d{4}$/', $code)) {
	+ if (!@preg_match('/^(R\|C\|W\|E\|F)\d{4}$/', $code)) {
	throw new Exception(
	pht(
	'Unrecognized lint message code "%s". Expected a valid Pylint '.
	diff --git a/src/lint/linter/ArcanistRuboCopLinter.php b/src/lint/linter/ArcanistRuboCopLinter.php
	--- a/src/lint/linter/ArcanistRuboCopLinter.php
	+++ b/src/lint/linter/ArcanistRuboCopLinter.php
	@@ -34,7 +34,7 @@
	list($stdout) = execx('%C --version', $this->getExecutableCommand());

	$matches = array();
	- if (preg_match('/^(?P<version>\d+\.\d+\.\d+)$/', $stdout, $matches)) {
	+ if (@preg_match('/^(?P<version>\d+\.\d+\.\d+)$/', $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	diff --git a/src/lint/linter/ArcanistRubyLinter.php b/src/lint/linter/ArcanistRubyLinter.php
	--- a/src/lint/linter/ArcanistRubyLinter.php
	+++ b/src/lint/linter/ArcanistRubyLinter.php
	@@ -36,7 +36,7 @@

	$matches = array();
	$regex = '/^ruby (?P<version>\d+\.\d+\.\d+)+/';
	- if (preg_match($regex, $stdout, $matches)) {
	+ if (@preg_match($regex, $stdout, $matches)) {
	return $matches['version'];
	} else {
	return false;
	@@ -60,7 +60,7 @@
	foreach ($lines as $line) {
	$matches = null;

	- if (!preg_match('/(.?):(\d+): (.?)$/', $line, $matches)) {
	+ if (!@preg_match('/(.?):(\d+): (.?)$/', $line, $matches)) {
	continue;
	}

	@@ -68,7 +68,7 @@
	$matches[$key] = trim($match);
	}

	- $code = head(explode(',', $matches[3]));
	+ $code = head(@explode(',', $matches[3]));

	$message = new ArcanistLintMessage();
	$message->setPath($path);
	diff --git a/src/lint/linter/ArcanistScriptAndRegexLinter.php b/src/lint/linter/ArcanistScriptAndRegexLinter.php
	--- a/src/lint/linter/ArcanistScriptAndRegexLinter.php
	+++ b/src/lint/linter/ArcanistScriptAndRegexLinter.php
	@@ -204,7 +204,7 @@
	*/
	public function lintPath($path) {
	$output = idx($this->output, $path);
	- if (!strlen($output)) {
	+ if (!@strlen($output)) {
	// No output, but it exited 0, so just move on.
	return;
	}
	@@ -338,7 +338,7 @@
	}

	$line = idx($match, 'line');
	- if (strlen($line)) {
	+ if (@strlen($line)) {
	$line = (int)$line;
	if (!$line) {
	$line = 1;
	@@ -376,7 +376,7 @@
	'disabled' => ArcanistLintSeverity::SEVERITY_DISABLED,
	);

	- $severity_name = strtolower(idx($match, 'severity'));
	+ $severity_name = @strtolower(idx($match, 'severity'));

	foreach ($map as $name => $severity) {
	if (!empty($match[$name])) {
	diff --git a/src/lint/linter/ArcanistSpellingLinter.php b/src/lint/linter/ArcanistSpellingLinter.php
	--- a/src/lint/linter/ArcanistSpellingLinter.php
	+++ b/src/lint/linter/ArcanistSpellingLinter.php
	@@ -148,12 +148,12 @@
	private function checkPartialWord($path, $word, $correction) {
	$text = $this->getData($path);
	$pos = 0;
	- while ($pos < strlen($text)) {
	+ while ($pos < @strlen($text)) {
	$next = stripos($text, $word, $pos);
	if ($next === false) {
	return;
	}
	- $original = substr($text, $next, strlen($word));
	+ $original = @substr($text, $next, @strlen($word));
	$replacement = self::fixLetterCase($correction, $original);
	$this->raiseLintAtOffset(
	$next,
	@@ -170,12 +170,12 @@

	public static function fixLetterCase($string, $case) {
	switch ($case) {
	- case strtolower($case):
	- return strtolower($string);
	+ case @strtolower($case):
	+ return @strtolower($string);
	case strtoupper($case):
	return strtoupper($string);
	- case ucwords(strtolower($case)):
	- return ucwords(strtolower($string));
	+ case ucwords(@strtolower($case)):
	+ return ucwords(@strtolower($string));
	default:
	return null;
	}
	diff --git a/src/lint/linter/ArcanistTextLinter.php b/src/lint/linter/ArcanistTextLinter.php
	--- a/src/lint/linter/ArcanistTextLinter.php
	+++ b/src/lint/linter/ArcanistTextLinter.php
	@@ -93,7 +93,7 @@
	public function lintPath($path) {
	$this->lintEmptyFile($path);

	- if (!strlen($this->getData($path))) {
	+ if (!@strlen($this->getData($path))) {
	// If the file is empty, don't bother; particularly, don't require
	// the user to add a newline.
	return;
	@@ -134,12 +134,12 @@
	return;

	default:
	- if (strlen($filename) && $filename[0] == '.') {
	+ if (@strlen($filename) && $filename[0] == '.') {
	return;
	}
	}

	- if (preg_match('/^\s*$/', $data)) {
	+ if (@preg_match('/^\s*$/', $data)) {
	$this->raiseLintAtPath(
	self::LINT_EMPTY_FILE,
	pht("Empty files usually don't serve any useful purpose."));
	@@ -149,7 +149,7 @@

	protected function lintNewlines($path) {
	$data = $this->getData($path);
	- $pos = strpos($this->getData($path), "\r");
	+ $pos = @strpos($this->getData($path), "\r");

	if ($pos !== false) {
	$this->raiseLintAtOffset(
	@@ -166,7 +166,7 @@
	}

	protected function lintTabs($path) {
	- $pos = strpos($this->getData($path), "\t");
	+ $pos = @strpos($this->getData($path), "\t");
	if ($pos !== false) {
	$this->raiseLintAtOffset(
	$pos,
	@@ -177,11 +177,11 @@
	}

	protected function lintLineLength($path) {
	- $lines = explode("\n", $this->getData($path));
	+ $lines = @explode("\n", $this->getData($path));

	$width = $this->maxLineLength;
	foreach ($lines as $line_idx => $line) {
	- if (strlen($line) > $width) {
	+ if (@strlen($line) > $width) {
	$this->raiseLintAtLine(
	$line_idx + 1,
	1,
	@@ -189,7 +189,7 @@
	pht(
	'This line is %s characters long, but the '.
	'convention is %s characters.',
	- new PhutilNumber(strlen($line)),
	+ new PhutilNumber(@strlen($line)),
	$width),
	$line);
	}
	@@ -198,9 +198,9 @@

	protected function lintEOFNewline($path) {
	$data = $this->getData($path);
	- if (!strlen($data) \|\| $data[strlen($data) - 1] != "\n") {
	+ if (!@strlen($data) \|\| $data[@strlen($data) - 1] != "\n") {
	$this->raiseLintAtOffset(
	- strlen($data),
	+ @strlen($data),
	self::LINT_EOF_NEWLINE,
	pht('Files must end in a newline.'),
	'',
	@@ -271,7 +271,7 @@
	$data = $this->getData($path);

	$matches = null;
	- $preg = preg_match(
	+ $preg = @preg_match(
	'/^\s*\n/',
	$data,
	$matches,
	@@ -296,7 +296,7 @@
	$data = $this->getData($path);

	$matches = null;
	- $preg = preg_match(
	+ $preg = @preg_match(
	'/(?<=\n)\s+$/',
	$data,
	$matches,
	diff --git a/src/lint/linter/__tests__/ArcanistLinterTestCase.php b/src/lint/linter/__tests__/ArcanistLinterTestCase.php
	--- a/src/lint/linter/__tests__/ArcanistLinterTestCase.php
	+++ b/src/lint/linter/__tests__/ArcanistLinterTestCase.php
	@@ -12,7 +12,7 @@
	*/
	protected function getLinter() {
	$matches = null;
	- if (!preg_match('/^(\w+Linter)TestCase$/', get_class($this), $matches) \|\|
	+ if (!@preg_match('/^(\w+Linter)TestCase$/', get_class($this), $matches) \|\|
	!is_subclass_of($matches[1], 'ArcanistLinter')) {
	throw new Exception(pht('Unable to infer linter class name.'));
	}
	@@ -180,13 +180,13 @@

	$expect = trim($expect);
	if ($expect) {
	- $expect = explode("\n", $expect);
	+ $expect = @explode("\n", $expect);
	} else {
	$expect = array();
	}

	foreach ($expect as $result) {
	- $parts = explode(':', $result);
	+ $parts = @explode(':', $result);

	$message = new ArcanistLintMessage();

	@@ -283,7 +283,7 @@
	}

	private function compareTransform($expected, $actual) {
	- if (!strlen($expected)) {
	+ if (!@strlen($expected)) {
	return;
	}
	$this->assertEqual(
	diff --git a/src/lint/linter/__tests__/ArcanistTestXHPASTLintSwitchHook.php b/src/lint/linter/__tests__/ArcanistTestXHPASTLintSwitchHook.php
	--- a/src/lint/linter/__tests__/ArcanistTestXHPASTLintSwitchHook.php
	+++ b/src/lint/linter/__tests__/ArcanistTestXHPASTLintSwitchHook.php
	@@ -5,7 +5,7 @@

	public function checkSwitchToken(XHPASTToken $token) {
	if ($token->getTypeName() == 'T_STRING') {
	- switch (strtolower($token->getValue())) {
	+ switch (@strtolower($token->getValue())) {
	case 'throw_exception':
	return true;
	}
	diff --git a/src/lint/linter/xhpast/ArcanistXHPASTLintNamingHook.php b/src/lint/linter/xhpast/ArcanistXHPASTLintNamingHook.php
	--- a/src/lint/linter/xhpast/ArcanistXHPASTLintNamingHook.php
	+++ b/src/lint/linter/xhpast/ArcanistXHPASTLintNamingHook.php
	@@ -37,10 +37,10 @@
	* otherwise accept all the defaults, except allow any naming convention for
	* methods with "duck" in them, you might implement the method like this:
	*
	- * if (preg_match('/quack/i', $name)) {
	+ * if (@preg_match('/quack/i', $name)) {
	* return 'Symbol names containing "quack" are forbidden.';
	* }
	- * if ($type == 'method' && preg_match('/duck/i', $name)) {
	+ * if ($type == 'method' && @preg_match('/duck/i', $name)) {
	* return null; // Always accept.
	* }
	* return $default;
	@@ -66,7 +66,7 @@
	* @task util
	*/
	public static function isUpperCamelCase($symbol) {
	- return preg_match('/^[A-Z][A-Za-z0-9]*$/', $symbol);
	+ return @preg_match('/^[A-Z][A-Za-z0-9]*$/', $symbol);
	}

	/**
	@@ -77,7 +77,7 @@
	* @task util
	*/
	public static function isLowerCamelCase($symbol) {
	- return preg_match('/^[a-z][A-Za-z0-9]*$/', $symbol);
	+ return @preg_match('/^[a-z][A-Za-z0-9]*$/', $symbol);
	}

	/**
	@@ -88,7 +88,7 @@
	* @task util
	*/
	public static function isUppercaseWithUnderscores($symbol) {
	- return preg_match('/^[A-Z0-9_]+$/', $symbol);
	+ return @preg_match('/^[A-Z0-9_]+$/', $symbol);
	}

	/**
	@@ -99,7 +99,7 @@
	* @task util
	*/
	public static function isLowercaseWithUnderscores($symbol) {
	- return preg_match('/^[a-z0-9_]+$/', $symbol);
	+ return @preg_match('/^[a-z0-9_]+$/', $symbol);
	}

	/**
	diff --git a/src/lint/linter/xhpast/ArcanistXHPASTLinterRule.php b/src/lint/linter/xhpast/ArcanistXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/ArcanistXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/ArcanistXHPASTLinterRule.php
	@@ -149,7 +149,7 @@
	* statically; `null` if static evaluation was not possible.
	*/
	protected function evaluateStaticBoolean($string) {
	- switch (strtolower($string)) {
	+ switch (@strtolower($string)) {
	case '0':
	case 'null':
	case 'false':
	@@ -215,7 +215,7 @@

	foreach ($calls as $call) {
	$node = $call->getChildByIndex(0);
	- $name = strtolower($node->getConcreteString());
	+ $name = @strtolower($node->getConcreteString());

	if (in_array($name, $function_names)) {
	$nodes[] = $call;
	@@ -248,7 +248,7 @@
	$modifiers = array();

	foreach ($modifier_list->selectDescendantsOfType('n_STRING') as $modifier) {
	- $modifiers[strtolower($modifier->getConcreteString())] = true;
	+ $modifiers[@strtolower($modifier->getConcreteString())] = true;
	}

	return $modifiers;
	diff --git a/src/lint/linter/xhpast/rules/ArcanistAbstractPrivateMethodXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistAbstractPrivateMethodXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistAbstractPrivateMethodXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistAbstractPrivateMethodXHPASTLinterRule.php
	@@ -19,7 +19,7 @@
	$modifiers = array();

	foreach ($method_modifiers as $modifier) {
	- $modifiers[strtolower($modifier->getConcreteString())] = true;
	+ $modifiers[@strtolower($modifier->getConcreteString())] = true;
	}

	if (idx($modifiers, 'abstract') && idx($modifiers, 'private')) {
	diff --git a/src/lint/linter/xhpast/rules/ArcanistArrayIndexSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistArrayIndexSpacingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistArrayIndexSpacingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistArrayIndexSpacingXHPASTLinterRule.php
	@@ -22,9 +22,9 @@
	$trailing = $last->getNonsemanticTokensAfter();
	$trailing_text = implode('', mpull($trailing, 'getValue'));

	- if (preg_match('/^ +$/', $trailing_text)) {
	+ if (@preg_match('/^ +$/', $trailing_text)) {
	$this->raiseLintAtOffset(
	- $last->getOffset() + strlen($last->getValue()),
	+ $last->getOffset() + @strlen($last->getValue()),
	pht('Convention: no spaces before index access.'),
	$trailing_text,
	'');
	diff --git a/src/lint/linter/xhpast/rules/ArcanistArraySeparatorXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistArraySeparatorXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistArraySeparatorXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistArraySeparatorXHPASTLinterRule.php
	@@ -42,7 +42,7 @@
	$original = $value->getConcreteString();
	$replacement = $value->getConcreteString().',';

	- if (strpos($after, "\n") === false) {
	+ if (@strpos($after, "\n") === false) {
	$original .= $after;
	$replacement .= $after."\n".$array->getIndentation();
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistArrayValueXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistArrayValueXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistArrayValueXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistArrayValueXHPASTLinterRule.php
	@@ -35,7 +35,7 @@
	foreach ($array_values as $value) {
	list($before, $after) = $value->getSurroundingNonsemanticTokens();

	- if (strpos(implode('', mpull($before, 'getValue')), "\n") === false) {
	+ if (@strpos(implode('', mpull($before, 'getValue')), "\n") === false) {
	if (last($before) && last($before)->isAnyWhitespace()) {
	$token = last($before);
	$replacement = "\n".$value->getIndentation();
	diff --git a/src/lint/linter/xhpast/rules/ArcanistBinaryNumericScalarCasingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistBinaryNumericScalarCasingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistBinaryNumericScalarCasingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistBinaryNumericScalarCasingXHPASTLinterRule.php
	@@ -17,9 +17,9 @@
	$binaries = $this->getBinaryNumericScalars($root);

	foreach ($binaries as $binary) {
	- $value = substr($binary->getConcreteString(), 2);
	+ $value = @substr($binary->getConcreteString(), 2);

	- if (!preg_match('/^0b[01]+$/', $binary->getConcreteString())) {
	+ if (!@preg_match('/^0b[01]+$/', $binary->getConcreteString())) {
	$this->raiseLintAtNode(
	$binary,
	pht(
	@@ -37,7 +37,7 @@
	foreach ($numeric_scalars as $numeric_scalar) {
	$number = $numeric_scalar->getConcreteString();

	- if (preg_match('/^0b[01]+$/i', $number)) {
	+ if (@preg_match('/^0b[01]+$/i', $number)) {
	$binary_numeric_scalars[] = $numeric_scalar;
	}
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistCallParenthesesXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistCallParenthesesXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistCallParenthesesXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistCallParenthesesXHPASTLinterRule.php
	@@ -52,9 +52,9 @@

	$leading = $first->getNonsemanticTokensBefore();
	$leading_text = implode('', mpull($leading, 'getValue'));
	- if (preg_match('/^\s+$/', $leading_text)) {
	+ if (@preg_match('/^\s+$/', $leading_text)) {
	$this->raiseLintAtOffset(
	- $first->getOffset() - strlen($leading_text),
	+ $first->getOffset() - @strlen($leading_text),
	pht('Convention: no spaces before opening parentheses.'),
	$leading_text,
	'');
	@@ -79,9 +79,9 @@

	$trailing = $last->getNonsemanticTokensBefore();
	$trailing_text = implode('', mpull($trailing, 'getValue'));
	- if (preg_match('/^\s+$/', $trailing_text)) {
	+ if (@preg_match('/^\s+$/', $trailing_text)) {
	$this->raiseLintAtOffset(
	- $last->getOffset() - strlen($trailing_text),
	+ $last->getOffset() - @strlen($trailing_text),
	pht('Convention: no spaces before closing parentheses.'),
	$trailing_text,
	'');
	diff --git a/src/lint/linter/xhpast/rules/ArcanistClassFilenameMismatchXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistClassFilenameMismatchXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistClassFilenameMismatchXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistClassFilenameMismatchXHPASTLinterRule.php
	@@ -30,7 +30,7 @@
	$decl_string = $decl_name->getConcreteString();

	// Exclude strangely named classes, e.g. XHP tags.
	- if (!preg_match('/^\w+$/', $decl_string)) {
	+ if (!@preg_match('/^\w+$/', $decl_string)) {
	return;
	}

	diff --git a/src/lint/linter/xhpast/rules/ArcanistClassNameLiteralXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistClassNameLiteralXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistClassNameLiteralXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistClassNameLiteralXHPASTLinterRule.php
	@@ -27,7 +27,7 @@
	$strings = $class_declaration->selectDescendantsOfType('n_STRING_SCALAR');

	foreach ($strings as $string) {
	- $contents = substr($string->getSemanticString(), 1, -1);
	+ $contents = @substr($string->getSemanticString(), 1, -1);
	$replacement = null;

	if ($contents == $class_name) {
	@@ -48,7 +48,7 @@
	// clunky.

	$regex = '(^'.preg_quote($class_name).'$)';
	- if (!preg_match($regex, $contents)) {
	+ if (!@preg_match($regex, $contents)) {
	continue;
	}

	diff --git a/src/lint/linter/xhpast/rules/ArcanistCommentSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistCommentSpacingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistCommentSpacingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistCommentSpacingXHPASTLinterRule.php
	@@ -20,7 +20,7 @@
	if ($value[0] !== '#') {
	$match = null;

	- if (preg_match('@^(/[/]+)[^/\s]@', $value, $match)) {
	+ if (@preg_match('@^(/[/]+)[^/\s]@', $value, $match)) {
	$this->raiseLintAtOffset(
	$comment->getOffset(),
	pht('Put space after comment start.'),
	diff --git a/src/lint/linter/xhpast/rules/ArcanistCommentStyleXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistCommentStyleXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistCommentStyleXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistCommentStyleXHPASTLinterRule.php
	@@ -24,7 +24,7 @@
	'//',
	'#'),
	'#',
	- preg_match('/^#\S/', $value) ? '// ' : '//');
	+ @preg_match('/^#\S/', $value) ? '// ' : '//');
	}
	}

	diff --git a/src/lint/linter/xhpast/rules/ArcanistConcatenationOperatorXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistConcatenationOperatorXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistConcatenationOperatorXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistConcatenationOperatorXHPASTLinterRule.php
	@@ -25,7 +25,7 @@
	}

	$value = $wtoken->getValue();
	- if (strpos($value, "\n") !== false) {
	+ if (@strpos($value, "\n") !== false) {
	// If the whitespace has a newline, it's conventional.
	continue;
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistDeclarationParenthesesXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistDeclarationParenthesesXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistDeclarationParenthesesXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistDeclarationParenthesesXHPASTLinterRule.php
	@@ -36,7 +36,7 @@
	// Anonymous functions.
	if ($leading_text != ' ') {
	$this->raiseLintAtOffset(
	- $first->getOffset() - strlen($leading_text),
	+ $first->getOffset() - @strlen($leading_text),
	pht(
	'Convention: space before opening parenthesis in '.
	'anonymous function declarations.'),
	@@ -44,9 +44,9 @@
	' ');
	}
	} else {
	- if (preg_match('/^\s+$/', $leading_text)) {
	+ if (@preg_match('/^\s+$/', $leading_text)) {
	$this->raiseLintAtOffset(
	- $first->getOffset() - strlen($leading_text),
	+ $first->getOffset() - @strlen($leading_text),
	pht(
	'Convention: no spaces before opening parenthesis in '.
	'function and method declarations.'),
	@@ -55,9 +55,9 @@
	}
	}

	- if (preg_match('/^\s+$/', $trailing_text)) {
	+ if (@preg_match('/^\s+$/', $trailing_text)) {
	$this->raiseLintAtOffset(
	- $last->getOffset() - strlen($trailing_text),
	+ $last->getOffset() - @strlen($trailing_text),
	pht(
	'Convention: no spaces before closing parenthesis in '.
	'function and method declarations.'),
	@@ -87,7 +87,7 @@

	if (!$after) {
	$this->raiseLintAtOffset(
	- $use->getOffset() + strlen($use->getValue()),
	+ $use->getOffset() + @strlen($use->getValue()),
	pht(
	'Convention: space after `%s` token.',
	'use'),
	diff --git a/src/lint/linter/xhpast/rules/ArcanistDeprecationXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistDeprecationXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistDeprecationXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistDeprecationXHPASTLinterRule.php
	@@ -45,7 +45,7 @@
	->getChildByIndex(0)
	->getConcreteString();

	- $name = strtolower($name);
	+ $name = @strtolower($name);
	if (empty($map[$name])) {
	continue;
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistDoubleQuoteXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistDoubleQuoteXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistDoubleQuoteXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistDoubleQuoteXHPASTLinterRule.php
	@@ -39,7 +39,7 @@
	foreach ($strings as $string) {
	$concrete_string = $string->getConcreteString();
	$single_quoted = ($concrete_string[0] === "'");
	- $contents = substr($concrete_string, 1, -1);
	+ $contents = @substr($concrete_string, 1, -1);

	// Double quoted strings are allowed when the string contains the
	// following characters.
	@@ -64,7 +64,7 @@

	$contains_special_chars = false;
	foreach ($allowed_chars as $allowed_char) {
	- if (strpos($contents, $allowed_char) !== false) {
	+ if (@strpos($contents, $allowed_char) !== false) {
	$contains_special_chars = true;
	}
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistExitExpressionXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistExitExpressionXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistExitExpressionXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistExitExpressionXHPASTLinterRule.php
	@@ -30,7 +30,7 @@
	foreach ($unaries as $unary) {
	$operator = $unary->getChildByIndex(0)->getConcreteString();

	- if (strtolower($operator) === 'exit') {
	+ if (@strtolower($operator) === 'exit') {
	if ($unary->getParentNode()->getTypeName() !== 'n_STATEMENT') {
	$this->raiseLintAtNode(
	$unary,
	diff --git a/src/lint/linter/xhpast/rules/ArcanistFormattedStringXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistFormattedStringXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistFormattedStringXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistFormattedStringXHPASTLinterRule.php
	@@ -64,7 +64,7 @@
	foreach ($function_calls as $call) {
	$name = $call->getChildByIndex(0)->getConcreteString();

	- $name = strtolower($name);
	+ $name = @strtolower($name);
	$start = idx($functions + $this->printfFunctions, $name);

	if ($start === null) {
	diff --git a/src/lint/linter/xhpast/rules/ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRule.php
	@@ -50,7 +50,7 @@
	}
	}

	- if (strtolower($function_name) == 'intval') {
	+ if (@strtolower($function_name) == 'intval') {
	if (count($parameters->getChildren()) >= 2) {
	$base = $parameters->getChildByIndex(1);

	diff --git a/src/lint/linter/xhpast/rules/ArcanistHexadecimalNumericScalarCasingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistHexadecimalNumericScalarCasingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistHexadecimalNumericScalarCasingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistHexadecimalNumericScalarCasingXHPASTLinterRule.php
	@@ -17,9 +17,9 @@
	$hexadecimals = $this->getHexadecimalNumericScalars($root);

	foreach ($hexadecimals as $hexadecimal) {
	- $value = substr($hexadecimal->getConcreteString(), 2);
	+ $value = @substr($hexadecimal->getConcreteString(), 2);

	- if (!preg_match('/^0x[0-9A-F]+$/', $hexadecimal->getConcreteString())) {
	+ if (!@preg_match('/^0x[0-9A-F]+$/', $hexadecimal->getConcreteString())) {
	$this->raiseLintAtNode(
	$hexadecimal,
	pht(
	@@ -38,7 +38,7 @@
	foreach ($numeric_scalars as $numeric_scalar) {
	$number = $numeric_scalar->getConcreteString();

	- if (preg_match('/^0x[0-9A-F]+$/i', $number)) {
	+ if (@preg_match('/^0x[0-9A-F]+$/i', $number)) {
	$hexadecimal_numeric_scalars[] = $numeric_scalar;
	}
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistImplicitConstructorXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistImplicitConstructorXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistImplicitConstructorXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistImplicitConstructorXHPASTLinterRule.php
	@@ -20,7 +20,7 @@
	$method_name_token = $method->getChildByIndex(2);
	$method_name = $method_name_token->getConcreteString();

	- if (strtolower($class_name) === strtolower($method_name)) {
	+ if (@strtolower($class_name) === @strtolower($method_name)) {
	$this->raiseLintAtNode(
	$method_name_token,
	pht(
	diff --git a/src/lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php
	@@ -140,7 +140,7 @@
	if (!$token->isSemantic()) {
	// Liberally match "fall" in the comment text so that comments like
	// "fallthru", "fall through", "fallthrough", etc., are accepted.
	- if (preg_match('/fall/i', $token->getValue())) {
	+ if (@preg_match('/fall/i', $token->getValue())) {
	$block_ok = true;
	break;
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistInstanceOfOperatorXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistInstanceOfOperatorXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistInstanceOfOperatorXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistInstanceOfOperatorXHPASTLinterRule.php
	@@ -15,7 +15,7 @@
	foreach ($expressions as $expression) {
	$operator = $expression->getChildOfType(1, 'n_OPERATOR');

	- if (strtolower($operator->getConcreteString()) != 'instanceof') {
	+ if (@strtolower($operator->getConcreteString()) != 'instanceof') {
	continue;
	}

	diff --git a/src/lint/linter/xhpast/rules/ArcanistInvalidDefaultParameterXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistInvalidDefaultParameterXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistInvalidDefaultParameterXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistInvalidDefaultParameterXHPASTLinterRule.php
	@@ -25,9 +25,9 @@
	}

	$default_is_null = $default->getTypeName() == 'n_SYMBOL_NAME' &&
	- strtolower($default->getConcreteString()) == 'null';
	+ @strtolower($default->getConcreteString()) == 'null';

	- switch (strtolower($type->getConcreteString())) {
	+ switch (@strtolower($type->getConcreteString())) {
	case 'array':
	if ($default->getTypeName() == 'n_ARRAY_LITERAL') {
	break;
	diff --git a/src/lint/linter/xhpast/rules/ArcanistInvalidOctalNumericScalarXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistInvalidOctalNumericScalarXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistInvalidOctalNumericScalarXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistInvalidOctalNumericScalarXHPASTLinterRule.php
	@@ -13,7 +13,7 @@
	$octals = $this->getOctalNumericScalars($root);

	foreach ($octals as $octal) {
	- if (!preg_match('/^0[0-7]*$/', $octal->getConcreteString())) {
	+ if (!@preg_match('/^0[0-7]*$/', $octal->getConcreteString())) {
	$this->raiseLintAtNode(
	$octal,
	pht(
	@@ -32,7 +32,7 @@
	foreach ($numeric_scalars as $numeric_scalar) {
	$number = $numeric_scalar->getConcreteString();

	- if (preg_match('/^0\d+$/', $number)) {
	+ if (@preg_match('/^0\d+$/', $number)) {
	$octal_numeric_scalars[] = $numeric_scalar;
	}
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistIsAShouldBeInstanceOfXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistIsAShouldBeInstanceOfXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistIsAShouldBeInstanceOfXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistIsAShouldBeInstanceOfXHPASTLinterRule.php
	@@ -26,7 +26,7 @@
	// parameter is either absent or literally `false`.
	$allow_string = $parameters->getChildByIndex(2);

	- if (strtolower($allow_string->getConcreteString()) != 'false') {
	+ if (@strtolower($allow_string->getConcreteString()) != 'false') {
	continue;
	}
	}
	@@ -37,7 +37,7 @@
	switch ($class->getTypeName()) {
	case 'n_STRING_SCALAR':
	$replacement = stripslashes(
	- substr($class->getConcreteString(), 1, -1));
	+ @substr($class->getConcreteString(), 1, -1));
	break;

	case 'n_VARIABLE':
	diff --git a/src/lint/linter/xhpast/rules/ArcanistKeywordCasingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistKeywordCasingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistKeywordCasingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistKeywordCasingXHPASTLinterRule.php
	@@ -90,7 +90,7 @@
	foreach ($class_static_accesses as $class_static_access) {
	$class_ref = $class_static_access->getChildByIndex(0);

	- switch (strtolower($class_ref->getConcreteString())) {
	+ switch (@strtolower($class_ref->getConcreteString())) {
	case 'parent':
	case 'self':
	$tokens = $class_ref->getTokens();
	@@ -110,14 +110,14 @@
	foreach ($keywords as $keyword) {
	$value = $keyword->getValue();

	- if ($value != strtolower($value)) {
	+ if ($value != @strtolower($value)) {
	$this->raiseLintAtToken(
	$keyword,
	pht(
	'Convention: spell keyword `%s` as `%s`.',
	$value,
	- strtolower($value)),
	- strtolower($value));
	+ @strtolower($value)),
	+ @strtolower($value));
	}
	}

	@@ -135,15 +135,15 @@
	continue;
	}

	- if (idx($interesting_symbols, strtolower($symbol_name))) {
	- if ($symbol_name != strtolower($symbol_name)) {
	+ if (idx($interesting_symbols, @strtolower($symbol_name))) {
	+ if ($symbol_name != @strtolower($symbol_name)) {
	$this->raiseLintAtNode(
	$symbol,
	pht(
	'Convention: spell keyword `%s` as `%s`.',
	$symbol_name,
	- strtolower($symbol_name)),
	- strtolower($symbol_name));
	+ @strtolower($symbol_name)),
	+ @strtolower($symbol_name));
	}
	}
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistLowercaseFunctionsXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistLowercaseFunctionsXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistLowercaseFunctionsXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistLowercaseFunctionsXHPASTLinterRule.php
	@@ -32,15 +32,15 @@

	$function_name = $function->getConcreteString();

	- if (!idx($builtin_functions, strtolower($function_name))) {
	+ if (!idx($builtin_functions, @strtolower($function_name))) {
	continue;
	}

	- if ($function_name != strtolower($function_name)) {
	+ if ($function_name != @strtolower($function_name)) {
	$this->raiseLintAtNode(
	$function,
	pht('Calls to built-in PHP functions should be lowercase.'),
	- strtolower($function_name));
	+ @strtolower($function_name));
	}
	}
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistNewlineAfterOpenTagXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistNewlineAfterOpenTagXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistNewlineAfterOpenTagXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistNewlineAfterOpenTagXHPASTLinterRule.php
	@@ -22,7 +22,7 @@
	$next = $next->getNextToken()) {

	if ($next->getTypeName() == 'T_WHITESPACE' &&
	- preg_match('/\n\s*\n/', $next->getValue())) {
	+ @preg_match('/\n\s*\n/', $next->getValue())) {
	continue 2;
	}

	diff --git a/src/lint/linter/xhpast/rules/ArcanistObjectOperatorSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistObjectOperatorSpacingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistObjectOperatorSpacingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistObjectOperatorSpacingXHPASTLinterRule.php
	@@ -23,7 +23,7 @@
	if ($before) {
	$value = implode('', mpull($before, 'getValue'));

	- if (strpos($value, "\n") !== false) {
	+ if (@strpos($value, "\n") !== false) {
	continue;
	}

	diff --git a/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php
	@@ -354,7 +354,7 @@

	$heredocs = $root->selectDescendantsOfType('n_HEREDOC');
	foreach ($heredocs as $heredoc) {
	- if (preg_match('/^<<<[\'"]/', $heredoc->getConcreteString())) {
	+ if (@preg_match('/^<<<[\'"]/', $heredoc->getConcreteString())) {
	$this->raiseLintAtNode(
	$heredoc,
	pht(
	@@ -411,7 +411,7 @@
	continue;
	}

	- if (strtolower($class->getConcreteString()) != 'self') {
	+ if (@strtolower($class->getConcreteString()) != 'self') {
	continue;
	}

	@@ -447,7 +447,7 @@

	$numeric_scalars = $root->selectDescendantsOfType('n_NUMERIC_SCALAR');
	foreach ($numeric_scalars as $numeric_scalar) {
	- if (preg_match('/^0b[01]+$/i', $numeric_scalar->getConcreteString())) {
	+ if (@preg_match('/^0b[01]+$/i', $numeric_scalar->getConcreteString())) {
	$this->raiseLintAtNode(
	$numeric_scalar,
	pht(
	diff --git a/src/lint/linter/xhpast/rules/ArcanistPHPOpenTagXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPHPOpenTagXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistPHPOpenTagXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistPHPOpenTagXHPASTLinterRule.php
	@@ -18,7 +18,7 @@
	} else if ($token->getTypeName() === 'T_OPEN_TAG_WITH_ECHO') {
	break;
	} else {
	- if (!preg_match('/^#!/', $token->getValue())) {
	+ if (!@preg_match('/^#!/', $token->getValue())) {
	$this->raiseLintAtToken(
	$token,
	pht(
	diff --git a/src/lint/linter/xhpast/rules/ArcanistPaamayimNekudotayimSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistPaamayimNekudotayimSpacingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistPaamayimNekudotayimSpacingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistPaamayimNekudotayimSpacingXHPASTLinterRule.php
	@@ -22,7 +22,7 @@

	foreach ($tokens as $token) {
	if ($token->isAnyWhitespace()) {
	- if (strpos($token->getValue(), "\n") !== false) {
	+ if (@strpos($token->getValue(), "\n") !== false) {
	continue;
	}

	diff --git a/src/lint/linter/xhpast/rules/ArcanistParentMemberReferenceXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistParentMemberReferenceXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistParentMemberReferenceXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistParentMemberReferenceXHPASTLinterRule.php
	@@ -45,7 +45,7 @@
	}
	$class_ref_name = $class_ref->getConcreteString();

	- if (strtolower($parent_class) == strtolower($class_ref_name)) {
	+ if (@strtolower($parent_class) == @strtolower($class_ref_name)) {
	$in_closure = false;

	foreach ($closures as $closure) {
	diff --git a/src/lint/linter/xhpast/rules/ArcanistParenthesesSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistParenthesesSpacingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistParenthesesSpacingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistParenthesesSpacingXHPASTLinterRule.php
	@@ -40,13 +40,13 @@
	$raise = array();

	$string_o = implode('', mpull($nonsem_o, 'getValue'));
	- if (preg_match('/^[ ]+$/', $string_o)) {
	+ if (@preg_match('/^[ ]+$/', $string_o)) {
	$raise[] = array($nonsem_o, $string_o);
	}

	if ($nonsem_o !== $nonsem_c) {
	$string_c = implode('', mpull($nonsem_c, 'getValue'));
	- if (preg_match('/^[ ]+$/', $string_c)) {
	+ if (@preg_match('/^[ ]+$/', $string_c)) {
	$raise[] = array($nonsem_c, $string_c);
	}
	}
	diff --git a/src/lint/linter/xhpast/rules/ArcanistReusedAsIteratorXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistReusedAsIteratorXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistReusedAsIteratorXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistReusedAsIteratorXHPASTLinterRule.php
	@@ -108,7 +108,7 @@

	$calls = $body->selectDescendantsOfType('n_FUNCTION_CALL');
	foreach ($calls as $call) {
	- $name = strtolower($call->getChildByIndex(0)->getConcreteString());
	+ $name = @strtolower($call->getChildByIndex(0)->getConcreteString());

	if ($name === 'empty' \|\| $name === 'isset') {
	$params = $call
	diff --git a/src/lint/linter/xhpast/rules/ArcanistSelfClassReferenceXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistSelfClassReferenceXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistSelfClassReferenceXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistSelfClassReferenceXHPASTLinterRule.php
	@@ -33,7 +33,7 @@
	continue;
	}

	- if (strtolower($type->getConcreteString()) == strtolower($class_name)) {
	+ if (@strtolower($type->getConcreteString()) == @strtolower($class_name)) {
	$this->raiseLintAtNode(
	$type,
	pht(
	diff --git a/src/lint/linter/xhpast/rules/ArcanistSelfMemberReferenceXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistSelfMemberReferenceXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistSelfMemberReferenceXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistSelfMemberReferenceXHPASTLinterRule.php
	@@ -32,7 +32,7 @@
	}
	$class_ref_name = $class_ref->getConcreteString();

	- if (strtolower($class_name) == strtolower($class_ref_name)) {
	+ if (@strtolower($class_name) == @strtolower($class_ref_name)) {
	$in_closure = false;

	foreach ($closures as $closure) {
	diff --git a/src/lint/linter/xhpast/rules/ArcanistSlownessXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistSlownessXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistSlownessXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistSlownessXHPASTLinterRule.php
	@@ -46,7 +46,7 @@
	continue;
	}

	- $name = strtolower($strstr->getChildByIndex(0)->getConcreteString());
	+ $name = @strtolower($strstr->getChildByIndex(0)->getConcreteString());
	if ($name === 'strstr' \|\| $name === 'strchr') {
	$this->raiseLintAtNode(
	$strstr,
	@@ -91,7 +91,7 @@
	continue;
	}

	- $name = strtolower($strpos->getChildByIndex(0)->getConcreteString());
	+ $name = @strtolower($strpos->getChildByIndex(0)->getConcreteString());
	if ($name === 'strpos') {
	$this->raiseLintAtNode(
	$strpos,
	diff --git a/src/lint/linter/xhpast/rules/ArcanistStaticThisXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistStaticThisXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistStaticThisXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistStaticThisXHPASTLinterRule.php
	@@ -24,10 +24,10 @@
	$method_is_abstract = false;

	foreach ($attributes as $attribute) {
	- if (strtolower($attribute->getConcreteString()) === 'static') {
	+ if (@strtolower($attribute->getConcreteString()) === 'static') {
	$method_is_static = true;
	}
	- if (strtolower($attribute->getConcreteString()) === 'abstract') {
	+ if (@strtolower($attribute->getConcreteString()) === 'abstract') {
	$method_is_abstract = true;
	}
	}
	@@ -45,7 +45,7 @@

	foreach ($variables as $variable) {
	if ($method_is_static &&
	- strtolower($variable->getConcreteString()) === '$this') {
	+ @strtolower($variable->getConcreteString()) === '$this') {
	$this->raiseLintAtNode(
	$variable,
	pht(
	diff --git a/src/lint/linter/xhpast/rules/ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRule.php
	@@ -25,7 +25,7 @@
	$leading_text = implode('', mpull($before, 'getValue'));

	$this->raiseLintAtOffset(
	- $operator->getOffset() - strlen($leading_text),
	+ $operator->getOffset() - @strlen($leading_text),
	pht('Unary postfix operators should not be prefixed by whitespace.'),
	$leading_text,
	'');
	diff --git a/src/lint/linter/xhpast/rules/ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRule.php
	@@ -21,7 +21,7 @@
	$operator_value = $operator->getConcreteString();
	list($before, $after) = $operator->getSurroundingNonsemanticTokens();

	- switch (strtolower($operator_value)) {
	+ switch (@strtolower($operator_value)) {
	case 'clone':
	case 'echo':
	case 'print':
	@@ -30,7 +30,7 @@
	default:
	if (!empty($after)) {
	$this->raiseLintAtOffset(
	- $operator->getOffset() + strlen($operator->getConcreteString()),
	+ $operator->getOffset() + @strlen($operator->getConcreteString()),
	pht(
	'Unary prefix operators should not be followed by whitespace.'),
	implode('', mpull($after, 'getValue')),
	diff --git a/src/lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php
	@@ -150,7 +150,7 @@

	$calls = $body->selectDescendantsOfType('n_FUNCTION_CALL');
	foreach ($calls as $call) {
	- $name = strtolower($call->getChildByIndex(0)->getConcreteString());
	+ $name = @strtolower($call->getChildByIndex(0)->getConcreteString());

	if ($name === 'empty' \|\| $name === 'isset') {
	$params = $call
	diff --git a/src/lint/linter/xhpast/rules/ArcanistUnexpectedReturnValueXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistUnexpectedReturnValueXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistUnexpectedReturnValueXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistUnexpectedReturnValueXHPASTLinterRule.php
	@@ -21,7 +21,7 @@
	->getChildOfType(2, 'n_STRING')
	->getConcreteString();

	- switch (strtolower($method_name)) {
	+ switch (@strtolower($method_name)) {
	case '__construct':
	case '__destruct':
	$returns = $method->selectDescendantsOfType('n_RETURN');
	diff --git a/src/lint/linter/xhpast/rules/ArcanistUnnecessarySymbolAliasXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistUnnecessarySymbolAliasXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistUnnecessarySymbolAliasXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistUnnecessarySymbolAliasXHPASTLinterRule.php
	@@ -24,7 +24,7 @@
	continue;
	}

	- $symbol_name = last(explode('\\', $symbol->getConcreteString()));
	+ $symbol_name = last(@explode('\\', $symbol->getConcreteString()));
	$alias_name = $alias->getConcreteString();

	if ($symbol_name == $alias_name) {
	diff --git a/src/lint/linter/xhpast/rules/ArcanistUnsafeDynamicStringXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistUnsafeDynamicStringXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistUnsafeDynamicStringXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistUnsafeDynamicStringXHPASTLinterRule.php
	@@ -78,7 +78,7 @@

	foreach ($calls as $call) {
	$name = $call->getChildByIndex(0)->getConcreteString();
	- $param = idx($safe, strtolower($name));
	+ $param = idx($safe, @strtolower($name));

	if ($param === null) {
	continue;
	diff --git a/src/lint/linter/xhpast/rules/ArcanistUseStatementNamespacePrefixXHPASTLinterRule.php b/src/lint/linter/xhpast/rules/ArcanistUseStatementNamespacePrefixXHPASTLinterRule.php
	--- a/src/lint/linter/xhpast/rules/ArcanistUseStatementNamespacePrefixXHPASTLinterRule.php
	+++ b/src/lint/linter/xhpast/rules/ArcanistUseStatementNamespacePrefixXHPASTLinterRule.php
	@@ -29,7 +29,7 @@
	pht(
	'Imported symbols should not be prefixed with `%s`.',
	'\\'),
	- substr($symbol_name, 1));
	+ @substr($symbol_name, 1));
	}
	}
	}
	diff --git a/src/lint/linter/xhpast/rules/__tests__/ArcanistXHPASTLinterRuleTestCase.php b/src/lint/linter/xhpast/rules/__tests__/ArcanistXHPASTLinterRuleTestCase.php
	--- a/src/lint/linter/xhpast/rules/__tests__/ArcanistXHPASTLinterRuleTestCase.php
	+++ b/src/lint/linter/xhpast/rules/__tests__/ArcanistXHPASTLinterRuleTestCase.php
	@@ -34,7 +34,7 @@
	$class = get_class($this);
	$matches = null;

	- if (!preg_match('/^(\w+XHPASTLinterRule)TestCase$/', $class, $matches) \|\|
	+ if (!@preg_match('/^(\w+XHPASTLinterRule)TestCase$/', $class, $matches) \|\|
	!is_subclass_of($matches[1], 'ArcanistXHPASTLinterRule')) {
	throw new Exception(pht('Unable to infer linter rule class name.'));
	}
	diff --git a/src/lint/linter/xhpast/rules/__tests__/slowness/slowness.lint-test b/src/lint/linter/xhpast/rules/__tests__/slowness/slowness.lint-test
	--- a/src/lint/linter/xhpast/rules/__tests__/slowness/slowness.lint-test
	+++ b/src/lint/linter/xhpast/rules/__tests__/slowness/slowness.lint-test
	@@ -1,9 +1,9 @@
	<?php

	-(strpos('a', 'b') === 0);
	-(strpos('a', 'b') !== 0);
	-(0 === strpos('a', 'b'));
	-(1 + 0 === strpos('a', 'b'));
	+(@strpos('a', 'b') === 0);
	+(@strpos('a', 'b') !== 0);
	+(0 === @strpos('a', 'b'));
	+(1 + 0 === @strpos('a', 'b'));

	(strstr('a', 'b') === false);
	(strstr('a', 'b') === 'b');
	diff --git a/src/lint/renderer/ArcanistConsoleLintRenderer.php b/src/lint/renderer/ArcanistConsoleLintRenderer.php
	--- a/src/lint/renderer/ArcanistConsoleLintRenderer.php
	+++ b/src/lint/renderer/ArcanistConsoleLintRenderer.php
	@@ -136,7 +136,7 @@
	if ($start > ($max_old + 1)) {
	$invalid_position = true;
	} else if ($start > $max_old) {
	- if (strlen($original)) {
	+ if (@strlen($original)) {
	$invalid_position = true;
	} else if ($char !== null && $char !== 1) {
	$invalid_position = true;
	@@ -164,7 +164,7 @@
	$old,
	$replacement,
	$patch_offset,
	- strlen($original));
	+ @strlen($original));
	$new_lines = phutil_split_lines($new);

	// Figure out how many "-" and "+" lines we have by counting the newlines
	@@ -179,7 +179,7 @@
	$old_lines[$start - 1],
	$this->highlightText($original),
	$char - 1,
	- strlen($original));
	+ @strlen($original));

	// See T13543. The message may have completely removed this line: for
	// example, if it trimmed trailing spaces from the end of a file. If
	@@ -189,7 +189,7 @@
	$new_lines[$start - 1],
	$this->highlightText($replacement),
	$char - 1,
	- strlen($replacement));
	+ @strlen($replacement));
	}
	}

	@@ -242,12 +242,12 @@
	// If we have "original" text and it is contained on a single line,
	// highlight the affected area. If we don't have any text, we'll mark
	// the character with a caret (below, in rendering) instead.
	- if ($old_impact == 1 && strlen($original)) {
	+ if ($old_impact == 1 && @strlen($original)) {
	$old_lines[$start - 1] = substr_replace(
	$old_lines[$start - 1],
	$this->highlightText($original),
	$char - 1,
	- strlen($original));
	+ @strlen($original));
	}

	$old_impact = 0;
	@@ -311,7 +311,7 @@
	// doesn't mess up. This can happen when the last line of the old file
	// didn't have a newline at the end.
	$text = $spec['text'];
	- if (!preg_match('/\n\z/', $spec['text'])) {
	+ if (!@preg_match('/\n\z/', $spec['text'])) {
	$text .= "\n";
	}

	@@ -324,7 +324,7 @@
	// If this is just a message and does not have a patch, put a little
	// caret underneath the line to point out where the issue is.
	if ($chevron) {
	- if (!$message->isPatchable() && !strlen($original)) {
	+ if (!$message->isPatchable() && !@strlen($original)) {
	$result[] = $this->renderCaret($char)."\n";
	}
	}
	@@ -357,14 +357,14 @@
	foreach ($lines as $line) {
	$line_map[$number] = $offset;
	$number++;
	- $offset += strlen($line);
	+ $offset += @strlen($line);
	}

	// If the last line ends in a newline, add a virtual offset for the final
	// line with no characters on it. This allows lint messages to target the
	// last line of the file at character 1.
	if ($lines) {
	- if (preg_match('/\n\z/', $line)) {
	+ if (@preg_match('/\n\z/', $line)) {
	$line_map[$number] = $offset;
	}
	}
	diff --git a/src/lint/renderer/ArcanistJSONLintRenderer.php b/src/lint/renderer/ArcanistJSONLintRenderer.php
	--- a/src/lint/renderer/ArcanistJSONLintRenderer.php
	+++ b/src/lint/renderer/ArcanistJSONLintRenderer.php
	@@ -9,7 +9,7 @@
	public function renderLintResult(ArcanistLintResult $result) {
	$messages = $result->getMessages();
	$path = $result->getPath();
	- $data = explode("\n", $result->getData());
	+ $data = @explode("\n", $result->getData());
	array_unshift($data, ''); // make the line numbers work as array indices

	$output = array($path => array());
	diff --git a/src/moduleutils/PhutilLibraryMapBuilder.php b/src/moduleutils/PhutilLibraryMapBuilder.php
	--- a/src/moduleutils/PhutilLibraryMapBuilder.php
	+++ b/src/moduleutils/PhutilLibraryMapBuilder.php
	@@ -326,7 +326,7 @@
	->find();

	$extensions_dir = 'extensions/';
	- $extensions_len = strlen($extensions_dir);
	+ $extensions_len = @strlen($extensions_dir);

	$map = array();
	foreach ($files as $file => $hash) {
	diff --git a/src/object/Phobject.php b/src/object/Phobject.php
	--- a/src/object/Phobject.php
	+++ b/src/object/Phobject.php
	@@ -1,4 +1,4 @@
	-<?php
	+x<?php

	/**
	* Base class for libphutil objects. Enforces stricter object semantics than
	@@ -33,22 +33,27 @@
	get_class($this).'::'.$name));
	}

	+ #[\ReturnTypeWillChange]
	public function current() {
	$this->throwOnAttemptedIteration();
	}

	+ #[\ReturnTypeWillChange]
	public function key() {
	$this->throwOnAttemptedIteration();
	}

	+ #[\ReturnTypeWillChange]
	public function next() {
	$this->throwOnAttemptedIteration();
	}

	+ #[\ReturnTypeWillChange]
	public function rewind() {
	$this->throwOnAttemptedIteration();
	}

	+ #[\ReturnTypeWillChange]
	public function valid() {
	$this->throwOnAttemptedIteration();
	}
	@@ -86,7 +91,7 @@
	}

	if ($byte_limit !== null) {
	- if (!is_string($const) \|\| (strlen($const) > $byte_limit)) {
	+ if (!is_string($const) \|\| (@strlen($const) > $byte_limit)) {
	throw new Exception(
	pht(
	'"%s" class "%s" has an invalid "%s" property. Field constants '.
	diff --git a/src/parser/ArcanistBaseCommitParser.php b/src/parser/ArcanistBaseCommitParser.php
	--- a/src/parser/ArcanistBaseCommitParser.php
	+++ b/src/parser/ArcanistBaseCommitParser.php
	@@ -19,7 +19,7 @@
	$spec = array_filter($spec);

	foreach ($spec as $rule) {
	- if (strpos($rule, ':') === false) {
	+ if (@strpos($rule, ':') === false) {
	throw new ArcanistUsageException(
	pht(
	"Rule '%s' is invalid, it must have a type and name like '%s'.",
	@@ -98,7 +98,7 @@
	// NOTE: Returning `null` from this method means "no match".
	// Returning `false` from this method means "stop current ruleset".

	- list($type, $name) = explode(':', $rule, 2);
	+ list($type, $name) = @explode(':', $rule, 2);
	switch ($type) {
	case 'literal':
	return $name;
	@@ -133,7 +133,7 @@
	$reason = pht('it is what you typed when prompted.');
	$this->api->setBaseCommitExplanation($reason);
	$result = phutil_console_prompt(pht('Against which commit?'));
	- if (!strlen($result)) {
	+ if (!@strlen($result)) {
	// Allow the user to continue to the next rule by entering no
	// text.
	return null;
	@@ -169,7 +169,7 @@
	return $this->api->resolveBaseCommitRule($rule, $source);
	default:
	$matches = null;
	- if (preg_match('/^exec$(.*)$$/', $name, $matches)) {
	+ if (@preg_match('/^exec$(.*)$$/', $name, $matches)) {
	$root = $this->api->getWorkingCopyIdentity()->getProjectRoot();
	$future = new ExecFuture('%C', $matches[1]);
	$future->setCWD($root);
	@@ -179,7 +179,7 @@
	} else {
	return null;
	}
	- } else if (preg_match('/^nodiff$(.*)$$/', $name, $matches)) {
	+ } else if (@preg_match('/^nodiff$(.*)$$/', $name, $matches)) {
	return $this->api->resolveBaseCommitRule($rule, $source);
	}

	diff --git a/src/parser/ArcanistBundle.php b/src/parser/ArcanistBundle.php
	--- a/src/parser/ArcanistBundle.php
	+++ b/src/parser/ArcanistBundle.php
	@@ -136,7 +136,7 @@
	'tar tfO %s',
	$path);
	list($stdout, $file_list) = $future->resolvex();
	- $file_list = explode("\n", trim($file_list));
	+ $file_list = @explode("\n", trim($file_list));

	if (in_array('meta.json', $file_list)) {
	$future = new ExecFuture(
	@@ -414,7 +414,7 @@
	// TODO: This is only relevant when patching old Differential diffs
	// which were created prior to arc pruning TYPE_COPY_AWAY for files
	// with no modifications.
	- if (!strlen($change_body) && ($old_mode == $new_mode)) {
	+ if (!@strlen($change_body) && ($old_mode == $new_mode)) {
	continue;
	}
	}
	@@ -627,7 +627,7 @@
	//
	// Everyone is at fault here and there are no winners.

	- if (strpos($path, ' ') !== false) {
	+ if (@strpos($path, ' ') !== false) {
	$path = $path."\t";
	}

	@@ -639,7 +639,7 @@
	$old_path = $change->getOldPath();
	$type = $change->getType();

	- if (!strlen($old_path) \|\|
	+ if (!@strlen($old_path) \|\|
	$type == ArcanistDiffChangeType::TYPE_ADD) {
	$old_path = null;
	}
	@@ -651,7 +651,7 @@
	$cur_path = $change->getCurrentPath();
	$type = $change->getType();

	- if (!strlen($cur_path) \|\|
	+ if (!@strlen($cur_path) \|\|
	$type == ArcanistDiffChangeType::TYPE_DELETE \|\|
	$type == ArcanistDiffChangeType::TYPE_MULTICOPY) {
	$cur_path = null;
	@@ -672,7 +672,7 @@
	$n_len = $small_hunk->getNewLength();
	$corpus = $small_hunk->getCorpus();

	- $this->reserveBytes(strlen($corpus));
	+ $this->reserveBytes(@strlen($corpus));

	// NOTE: If the length is 1 it can be omitted. Since git does this,
	// we also do it so that "arc export --git" diffs are as similar to
	@@ -693,7 +693,7 @@
	$result[] = "@@ -{$o_head} +{$n_head} @@".$eol;
	$result[] = $corpus;

	- $last = substr($corpus, -1);
	+ $last = @substr($corpus, -1);
	if ($last !== false && $last != "\r" && $last != "\n") {
	$result[] = $eol;
	}
	@@ -763,7 +763,7 @@
	$old_data = $this->getBlob($old_phid, $name);
	}

	- $old_length = strlen($old_data);
	+ $old_length = @strlen($old_data);

	// Here, and below, the binary will be emitted with base85 encoding. This
	// encoding encodes each 4 bytes of input in 5 bytes of output, so we may
	@@ -796,7 +796,7 @@
	$new_data = $this->getBlob($new_phid, $name);
	}

	- $new_length = strlen($new_data);
	+ $new_length = @strlen($new_data);
	$this->reserveBytes($new_length * 5 / 4);

	if ($new_data === null) {
	@@ -995,7 +995,7 @@

	foreach ($lines as $idx => $line) {
	if ($idx === $final) {
	- $len = strlen($line);
	+ $len = @strlen($line);
	} else {
	$len = 52;
	}
	diff --git a/src/parser/ArcanistCommentRemover.php b/src/parser/ArcanistCommentRemover.php
	--- a/src/parser/ArcanistCommentRemover.php
	+++ b/src/parser/ArcanistCommentRemover.php
	@@ -14,7 +14,7 @@
	$lines = array_reverse($lines);

	foreach ($lines as $key => $line) {
	- if (preg_match('/^#/', $line)) {
	+ if (@preg_match('/^#/', $line)) {
	unset($lines[$key]);
	continue;
	}
	diff --git a/src/parser/ArcanistDiffParser.php b/src/parser/ArcanistDiffParser.php
	--- a/src/parser/ArcanistDiffParser.php
	+++ b/src/parser/ArcanistDiffParser.php
	@@ -95,9 +95,9 @@
	$root = $rinfo['URL'].'/';
	}
	$cpath = $info['Copied From URL'];
	- $root_len = strlen($root);
	+ $root_len = @strlen($root);
	if (!strncmp($cpath, $root, $root_len)) {
	- $cpath = substr($cpath, $root_len);
	+ $cpath = @substr($cpath, $root_len);
	// The user can "svn cp /path/to/file@12345 x", which pulls a file out
	// of version history at a specific revision. If we just use the path,
	// we'll collide with possible changes to that path in the working
	@@ -187,7 +187,7 @@
	}

	public function parseDiff($diff) {
	- if (!strlen(trim($diff))) {
	+ if (!@strlen(trim($diff))) {
	throw new Exception(pht("Can't parse an empty diff!"));
	}

	@@ -203,7 +203,7 @@
	// lost in transit.
	$detect_patch = '/^---$.*^-- ?[\s\d.]+\z/ms';
	$message = null;
	- if (preg_match($detect_patch, $diff)) {
	+ if (@preg_match($detect_patch, $diff)) {
	list($message, $diff) = $this->stripGitFormatPatch($diff);
	}

	@@ -213,11 +213,11 @@
	// file, `git apply` is more strict. We get these comments in `hg export`
	// diffs, and Eclipse can also produce them.
	$line = $this->getLineTrimmed();
	- while (preg_match('/^#/', $line)) {
	+ while (@preg_match('/^#/', $line)) {
	$line = $this->nextLine();
	}

	- if (strlen($message)) {
	+ if (@strlen($message)) {
	// If we found a message during pre-parse steps, add it to the resulting
	// changes here.
	$change = $this->buildChange(null)
	@@ -334,7 +334,7 @@
	$this->parseCommitMessage($change);
	break;
	case '---':
	- $ok = preg_match(
	+ $ok = @preg_match(
	'@^(?:\+\+\+) (.)\s+\d{4}-\d{2}-\d{2}.$@',
	$line,
	$match);
	@@ -370,7 +370,7 @@

	protected function tryMatchHeader($patterns, $line, &$match) {
	foreach ($patterns as $pattern) {
	- if (preg_match('@^'.$pattern.'$@', $line, $match)) {
	+ if (@preg_match('@^'.$pattern.'$@', $line, $match)) {
	return true;
	}
	}
	@@ -383,22 +383,22 @@
	$message = array();

	$line = $this->getLine();
	- if (preg_match('/^Merge: /', $line)) {
	+ if (@preg_match('/^Merge: /', $line)) {
	$this->nextLine();
	}

	$line = $this->getLine();
	- if (!preg_match('/^Author: /', $line)) {
	+ if (!@preg_match('/^Author: /', $line)) {
	$this->didFailParse(pht("Expected 'Author:'."));
	}

	$line = $this->nextLine();
	- if (!preg_match('/^Date: /', $line)) {
	+ if (!@preg_match('/^Date: /', $line)) {
	$this->didFailParse(pht("Expected 'Date:'."));
	}

	while (($line = $this->nextLineTrimmed()) !== null) {
	- if (strlen($line) && $line[0] != ' ') {
	+ if (@strlen($line) && $line[0] != ' ') {
	break;
	}

	@@ -418,13 +418,13 @@
	*/
	protected function parsePropertyHunk(ArcanistDiffChange $change) {
	$line = $this->getLineTrimmed();
	- if (!preg_match('/^_+$/', $line)) {
	+ if (!@preg_match('/^_+$/', $line)) {
	$this->didFailParse(pht("Expected '%s'.", '______________________'));
	}

	$line = $this->nextLine();
	while ($line !== null) {
	- $done = preg_match('/^(Index\|Property changes on):/', $line);
	+ $done = @preg_match('/^(Index\|Property changes on):/', $line);
	if ($done) {
	break;
	}
	@@ -433,7 +433,7 @@
	// "Modified", "Added" and "Deleted".

	$matches = null;
	- $ok = preg_match(
	+ $ok = @preg_match(
	'/^(Name\|Modified\|Added\|Deleted): (.*)$/',
	$line,
	$matches);
	@@ -468,7 +468,7 @@
	$line = $this->nextLine();
	$prop_index = 2;
	while ($line !== null) {
	- $done = preg_match(
	+ $done = @preg_match(
	'/^(Modified\|Added\|Deleted\|Index\|Property changes on):/',
	$line);
	if ($done) {
	@@ -490,7 +490,7 @@
	'+'));
	}
	$target = 'new';
	- $line = substr($trimline, $prop_index);
	+ $line = @substr($trimline, $prop_index);
	} else if ($trimline && $trimline[0] == '-') {
	if ($op == 'Added') {
	$this->didFailParse(pht(
	@@ -498,7 +498,7 @@
	'-'));
	}
	$target = 'old';
	- $line = substr($trimline, $prop_index);
	+ $line = @substr($trimline, $prop_index);
	} else if (!strncmp($trimline, 'Merged', 6)) {
	if ($op == 'Added') {
	$target = 'new';
	@@ -523,11 +523,11 @@
	$old = rtrim(implode('', $old));
	$new = rtrim(implode('', $new));

	- if (!strlen($old)) {
	+ if (!@strlen($old)) {
	$old = null;
	}

	- if (!strlen($new)) {
	+ if (!@strlen($new)) {
	$new = null;
	}

	@@ -583,7 +583,7 @@
	$ok = false;
	$match = null;
	foreach ($patterns as $pattern) {
	- $ok = preg_match('@^'.$pattern.'@', $line, $match);
	+ $ok = @preg_match('@^'.$pattern.'@', $line, $match);
	if ($ok) {
	break;
	}
	@@ -591,7 +591,7 @@

	if (!$ok) {
	if ($line === null \|\|
	- preg_match('/^(diff --git\|commit) /', $line)) {
	+ @preg_match('/^(diff --git\|commit) /', $line)) {
	// In this case, there are ONLY file mode changes, or this is a
	// pure move. If it's a move, flag these changesets so we can build
	// synthetic changes later, enabling us to show file contents in
	@@ -693,7 +693,7 @@
	$line = $this->getLine();

	if ($is_svn) {
	- $ok = preg_match('/^=+\s*$/', $line);
	+ $ok = @preg_match('/^=+\s*$/', $line);
	if (!$ok) {
	$this->didFailParse(pht(
	"Expected '%s' divider line.",
	@@ -703,7 +703,7 @@
	$line = $this->nextNonemptyLine();
	}
	} else if ($is_git) {
	- $ok = preg_match('/^index .*$/', $line);
	+ $ok = @preg_match('/^index .*$/', $line);
	if (!$ok) {
	// TODO: "hg diff -g" diffs ("mercurial git-style diffs") do not include
	// this line, so we can't parse them if we fail on it. Maybe introduce
	@@ -723,13 +723,13 @@
	// supplied as command-line flags to `diff', svn and git both produce
	// changes without any body.
	if ($line === null \|\|
	- preg_match(
	+ @preg_match(
	'/^(Index:\|Property changes on:\|diff --git\|commit) /',
	$line)) {
	return;
	}

	- $is_binary_add = preg_match(
	+ $is_binary_add = @preg_match(
	'/^Cannot display: file marked as a binary type\.$/',
	rtrim($line));
	if ($is_binary_add) {
	@@ -741,7 +741,7 @@

	// We can get this in git, or in SVN when a file exists in the repository
	// WITHOUT a binary mime-type and is changed and given a binary mime-type.
	- $is_binary_diff = preg_match(
	+ $is_binary_diff = @preg_match(
	'/^(Binary files\|Files) .* and .* differ$/',
	rtrim($line));
	if ($is_binary_diff) {
	@@ -754,7 +754,7 @@
	// test case "hg-binary-delete.hgdiff". (I believe it never occurs under
	// git, which reports the "files X and /dev/null differ" string above. Git
	// can not apply these patches.)
	- $is_hg_binary_delete = preg_match(
	+ $is_hg_binary_delete = @preg_match(
	'/^Binary file .* has changed$/',
	rtrim($line));
	if ($is_hg_binary_delete) {
	@@ -767,14 +767,14 @@
	// invoke and then, e.g., copy-paste into the web console) or "hg diff
	// --git" (normal under hg workflows), we may encounter a literal binary
	// patch.
	- $is_git_binary_patch = preg_match(
	+ $is_git_binary_patch = @preg_match(
	'/^GIT binary patch$/',
	rtrim($line));
	if ($is_git_binary_patch) {
	$this->nextLine();
	$this->parseGitBinaryPatch();
	$line = $this->getLine();
	- if (preg_match('/^literal/', $line)) {
	+ if (@preg_match('/^literal/', $line)) {
	// We may have old/new binaries (change) or just a new binary (hg add).
	// If there are two blocks, parse both.
	$this->parseGitBinaryPatch();
	@@ -785,7 +785,7 @@

	if ($is_git) {
	// "git diff -b" ignores whitespace, but has an empty hunk target
	- if (preg_match('@^diff --git .*$@', $line)) {
	+ if (@preg_match('@^diff --git .*$@', $line)) {
	$this->nextLine();
	return null;
	}
	@@ -817,7 +817,7 @@
	// case ("arc diff").

	$line = $this->getLine();
	- if (!preg_match('/^literal /', $line)) {
	+ if (!@preg_match('/^literal /', $line)) {
	$this->didFailParse(
	pht("Expected '%s' to start git binary patch.", 'literal NNNN'));
	}
	@@ -829,7 +829,7 @@
	// rely on the base85 check for sanity.
	$this->nextNonemptyLine();
	return;
	- } else if (!preg_match('/^[a-zA-Z]/', $line)) {
	+ } else if (!@preg_match('/^[a-zA-Z]/', $line)) {
	$this->didFailParse(
	pht('Expected base85 line length character (a-zA-Z).'));
	}
	@@ -853,7 +853,7 @@
	$remainder = '(?:\t.*)?';
	}

	- $ok = preg_match(
	+ $ok = @preg_match(
	'@^[-+]{3} (?:[ab]/)?(?P<path>.*?)'.$remainder.'$@',
	$line,
	$matches);
	@@ -893,7 +893,7 @@
	// The final group is for git, which appends a guess at the function
	// context to the diff.
	$matches = null;
	- $ok = preg_match(
	+ $ok = @preg_match(
	'/^@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@(?: .*?)?$/U',
	$line,
	$matches);
	@@ -904,7 +904,7 @@
	// by a "Property changes on:" section similar to svn1.6.
	if ($line == '') {
	$line = $this->nextNonemptyLine();
	- $ok = preg_match('/^Property changes on:/', $line);
	+ $ok = @preg_match('/^Property changes on:/', $line);
	if (!$ok) {
	$this->didFailParse(pht('Confused by empty line'));
	}
	@@ -921,11 +921,11 @@

	// Cover for the cases where length wasn't present (implying one line).
	$old_len = idx($matches, 2);
	- if (!strlen($old_len)) {
	+ if (!@strlen($old_len)) {
	$old_len = 1;
	}
	$new_len = idx($matches, 4);
	- if (!strlen($new_len)) {
	+ if (!@strlen($new_len)) {
	$new_len = 1;
	}

	@@ -937,7 +937,7 @@

	$hit_next_hunk = false;
	while ((($line = $this->nextLine()) !== null)) {
	- if (strlen(rtrim($line, "\r\n"))) {
	+ if (@strlen(rtrim($line, "\r\n"))) {
	$char = $line[0];
	} else {
	// Normally, we do not encouter empty lines in diffs, because
	@@ -949,7 +949,7 @@
	}
	switch ($char) {
	case '\\':
	- if (!preg_match('@\\ No newline at end of file@', $line)) {
	+ if (!@preg_match('@\\ No newline at end of file@', $line)) {
	$this->didFailParse(
	pht("Expected '\ No newline at end of file'."));
	}
	@@ -1041,7 +1041,7 @@
	$line = $this->nextNonemptyLine();
	}

	- } while (preg_match('/^@@ /', $line));
	+ } while (@preg_match('/^@@ /', $line));
	}

	protected function buildChange($path = null) {
	@@ -1096,7 +1096,7 @@
	// and you've dug your own grave.

	$ansi_color_pattern = '\x1B\[[\d;]*m';
	- if (preg_match('/^'.$ansi_color_pattern.'/m', $text)) {
	+ if (@preg_match('/^'.$ansi_color_pattern.'/m', $text)) {
	$text = preg_replace('/'.$ansi_color_pattern.'/', '', $text);
	}

	@@ -1137,7 +1137,7 @@

	protected function nextNonemptyLine() {
	while (($line = $this->nextLine()) !== null) {
	- if (strlen(trim($line)) !== 0) {
	+ if (@strlen(trim($line)) !== 0) {
	break;
	}
	}
	@@ -1146,7 +1146,7 @@

	protected function nextLineThatLooksLikeDiffStart() {
	while (($line = $this->nextLine()) !== null) {
	- if (preg_match('/^\s*diff\s+-(?:r\|-git)/', $line)) {
	+ if (@preg_match('/^\s*diff\s+-(?:r\|-git)/', $line)) {
	break;
	}
	}
	@@ -1166,12 +1166,12 @@
	for ($ii = 0; $ii < $len; $ii++) {
	$line = $this->text[$ii];

	- if (!strlen(trim($line))) {
	+ if (!@strlen(trim($line))) {
	// This line is empty, skip it.
	continue;
	}

	- if (preg_match('/^#/', $line)) {
	+ if (@preg_match('/^#/', $line)) {
	// This line is a comment, skip it.
	continue;
	}
	@@ -1227,8 +1227,8 @@
	* Unescape escaped filenames, e.g. from "git diff".
	*/
	private static function unescapeFilename($name) {
	- if (preg_match('/^".+"$/', $name)) {
	- return stripcslashes(substr($name, 1, -1));
	+ if (@preg_match('/^".+"$/', $name)) {
	+ return stripcslashes(@substr($name, 1, -1));
	} else {
	return $name;
	}
	@@ -1337,7 +1337,7 @@
	." "
	."(?P<new>(?P<newq>\"?){$prefix}\\k<common>\\k<newq>)$@";

	- if (!preg_match($pattern, $paths, $matches)) {
	+ if (!@preg_match($pattern, $paths, $matches)) {
	// A rename or some form; return null for now, and let the
	// "rename from" / "rename to" lines fix it up.
	return null;
	@@ -1379,15 +1379,15 @@
	// 9. Patch footer.

	list($head, $tail) = preg_split('/^---$/m', $diff, 2);
	- list($mail_headers, $mail_body) = explode("\n\n", $head, 2);
	+ list($mail_headers, $mail_body) = @explode("\n\n", $head, 2);
	list($body, $foot) = preg_split('/^-- ?$/m', $tail, 2);
	- list($stat, $diff) = explode("\n\n", $body, 2);
	+ list($stat, $diff) = @explode("\n\n", $body, 2);

	// Rebuild the commit message by putting the subject line back on top of it,
	// if we can find one.
	$matches = null;
	$pattern = '/^Subject: (?:\[PATCH\] )?(.*)$/mi';
	- if (preg_match($pattern, $mail_headers, $matches)) {
	+ if (@preg_match($pattern, $mail_headers, $matches)) {
	$mail_body = $matches[1]."\n\n".$mail_body;
	$mail_body = rtrim($mail_body);
	}
	diff --git a/src/parser/PhutilBugtraqParser.php b/src/parser/PhutilBugtraqParser.php
	--- a/src/parser/PhutilBugtraqParser.php
	+++ b/src/parser/PhutilBugtraqParser.php
	@@ -85,7 +85,7 @@
	$captured_text = $capture['text'];
	$captured_offset = $capture['at'];

	- if (strlen($select_regexp)) {
	+ if (@strlen($select_regexp)) {
	$selections = null;
	preg_match_all(
	$select_regexp,
	@@ -120,7 +120,7 @@
	$corpus,
	$new_text,
	$bug['at'],
	- strlen($bug['text']));
	+ @strlen($bug['text']));
	}

	return $corpus;
	diff --git a/src/parser/PhutilDocblockParser.php b/src/parser/PhutilDocblockParser.php
	--- a/src/parser/PhutilDocblockParser.php
	+++ b/src/parser/PhutilDocblockParser.php
	@@ -22,10 +22,10 @@

	// Build a map of character offset -> line number.
	$map = array();
	- $lines = explode("\n", $text);
	+ $lines = @explode("\n", $text);
	$num = 1;
	foreach ($lines as $line) {
	- $len = strlen($line) + 1;
	+ $len = @strlen($line) + 1;
	for ($jj = 0; $jj < $len; $jj++) {
	$map[] = $num;
	}
	@@ -48,7 +48,7 @@
	$docblock = preg_replace('@^\s\@m', '', $docblock);

	// Normalize multi-line @specials.
	- $lines = explode("\n", $docblock);
	+ $lines = @explode("\n", $docblock);
	$last = false;
	foreach ($lines as $k => $line) {

	@@ -66,10 +66,10 @@
	// we allow that and one additional space before assuming something is
	// a code block.

	- if (preg_match('/^\s{0,2}@\w/i', $line)) {
	+ if (@preg_match('/^\s{0,2}@\w/i', $line)) {
	$last = $k;
	$lines[$last] = trim($line);
	- } else if (preg_match('/^\s*$/', $line)) {
	+ } else if (@preg_match('/^\s*$/', $line)) {
	$last = false;
	} else if ($last !== false) {
	$lines[$last] = $lines[$last].' '.trim($line);
	@@ -100,7 +100,7 @@

	// For flags like "@stable" which don't have any string data, set the
	// value to true.
	- if (!strlen($data)) {
	+ if (!@strlen($data)) {
	$data = true;
	}

	@@ -138,8 +138,8 @@
	// Smush the whole docblock to the left edge.
	$min_indent = 80;
	$indent = 0;
	- foreach (array_filter(explode("\n", $docblock)) as $line) {
	- for ($ii = 0; $ii < strlen($line); $ii++) {
	+ foreach (array_filter(@explode("\n", $docblock)) as $line) {
	+ for ($ii = 0; $ii < @strlen($line); $ii++) {
	if ($line[$ii] != ' ') {
	break;
	}
	diff --git a/src/parser/PhutilEditorConfig.php b/src/parser/PhutilEditorConfig.php
	--- a/src/parser/PhutilEditorConfig.php
	+++ b/src/parser/PhutilEditorConfig.php
	@@ -122,10 +122,10 @@
	continue;
	}

	- if (strpos($glob, '/') === false) {
	+ if (@strpos($glob, '/') === false) {
	$glob = '**/'.$glob;
	} else if (strncmp($glob, '/', 0)) {
	- $glob = substr($glob, 1);
	+ $glob = @substr($glob, 1);
	}

	$glob = $path_prefix.'/'.$glob;
	@@ -139,7 +139,7 @@
	}

	foreach ($properties as $property => $value) {
	- $property = strtolower($property);
	+ $property = @strtolower($property);

	if (!idx(self::$knownProperties, $property)) {
	// Unknown property... ignore it.
	@@ -147,7 +147,7 @@
	}

	if (is_string($value)) {
	- $value = strtolower($value);
	+ $value = @strtolower($value);
	}
	if ($value === '') {
	$value = null;
	diff --git a/src/parser/PhutilEmailAddress.php b/src/parser/PhutilEmailAddress.php
	--- a/src/parser/PhutilEmailAddress.php
	+++ b/src/parser/PhutilEmailAddress.php
	@@ -16,15 +16,15 @@
	$email_address = trim($email_address);

	$matches = null;
	- if (preg_match('/^(.)<(.?)>$/', $email_address, $matches)) {
	+ if (@preg_match('/^(.)<(.?)>$/', $email_address, $matches)) {
	$display_name = trim($matches[1], '\'" ');
	- if (strpos($matches[2], '@') !== false) {
	- list($local_part, $domain_name) = explode('@', $matches[2], 2);
	+ if (@strpos($matches[2], '@') !== false) {
	+ list($local_part, $domain_name) = @explode('@', $matches[2], 2);
	} else {
	$local_part = $matches[2];
	$domain_name = null;
	}
	- } else if (preg_match('/^(.)@(.)$/', $email_address, $matches)) {
	+ } else if (@preg_match('/^(.)@(.)$/', $email_address, $matches)) {
	$display_name = null;
	$local_part = $matches[1];
	$domain_name = $matches[2];
	@@ -41,7 +41,7 @@

	public function __toString() {
	$address = $this->getAddress();
	- if (strlen($this->displayName)) {
	+ if (@strlen($this->displayName)) {
	$display_name = $this->encodeDisplayName($this->displayName);
	return $display_name.' <'.$address.'>';
	} else {
	@@ -77,7 +77,7 @@
	}

	public function setAddress($address) {
	- $parts = explode('@', $address, 2);
	+ $parts = @explode('@', $address, 2);

	$this->localPart = $parts[0];
	if (isset($parts[1])) {
	@@ -89,7 +89,7 @@

	public function getAddress() {
	$address = $this->localPart;
	- if (strlen($this->domainName)) {
	+ if (@strlen($this->domainName)) {
	$address .= '@'.$this->domainName;
	}
	return $address;
	diff --git a/src/parser/PhutilGitURI.php b/src/parser/PhutilGitURI.php
	--- a/src/parser/PhutilGitURI.php
	+++ b/src/parser/PhutilGitURI.php
	@@ -42,7 +42,7 @@

	$regexp = '/^'.$user.$domain.$path.'$/';
	$matches = null;
	- $ok = preg_match($regexp, $uri, $matches);
	+ $ok = @preg_match($regexp, $uri, $matches);
	if ($ok) {
	return array_pad($matches, 4, '');
	}
	diff --git a/src/parser/PhutilJSON.php b/src/parser/PhutilJSON.php
	--- a/src/parser/PhutilJSON.php
	+++ b/src/parser/PhutilJSON.php
	@@ -62,7 +62,7 @@
	$max = 0;
	foreach ($object as $key => $val) {
	$ekey = $this->encodeFormattedValue((string)$key, 0);
	- $max = max($max, strlen($ekey));
	+ $max = max($max, @strlen($ekey));
	$keys[] = $ekey;
	$vals[] = $this->encodeFormattedValue($val, $depth + 1);
	}
	diff --git a/src/parser/PhutilLanguageGuesser.php b/src/parser/PhutilLanguageGuesser.php
	--- a/src/parser/PhutilLanguageGuesser.php
	+++ b/src/parser/PhutilLanguageGuesser.php
	@@ -32,7 +32,7 @@

	foreach ($patterns as $pattern => $language) {
	$matches = null;
	- if (preg_match($pattern, $source, $matches)) {
	+ if (@preg_match($pattern, $source, $matches)) {
	if (is_numeric($language)) {
	return $matches[$language];
	} else {
	diff --git a/src/parser/PhutilQueryStringParser.php b/src/parser/PhutilQueryStringParser.php
	--- a/src/parser/PhutilQueryStringParser.php
	+++ b/src/parser/PhutilQueryStringParser.php
	@@ -42,7 +42,7 @@
	$list = $this->parseQueryStringToPairList($query_string);
	foreach ($list as $parts) {
	list($key, $value) = $parts;
	- if (!strlen($key)) {
	+ if (!@strlen($key)) {
	continue;
	}
	$this->parseQueryKeyToArr($key, $value, $result);
	@@ -74,16 +74,16 @@
	public function parseQueryStringToPairList($query_string) {
	$list = array();

	- if (!strlen($query_string)) {
	+ if (!@strlen($query_string)) {
	return $list;
	}

	- $pairs = explode('&', $query_string);
	+ $pairs = @explode('&', $query_string);
	foreach ($pairs as $pair) {
	- if (!strlen($pair)) {
	+ if (!@strlen($pair)) {
	continue;
	}
	- $parts = explode('=', $pair, 2);
	+ $parts = @explode('=', $pair, 2);
	if (count($parts) < 2) {
	$parts[] = '';
	}
	@@ -113,12 +113,12 @@
	* @param array $input_arr
	*/
	private function parseQueryKeyToArr($key, $val, array &$input_arr) {
	- if (preg_match('/^[^\[\]]+(?:\[[^\[\]]*\])+$/', $key)) {
	+ if (@preg_match('/^[^\[\]]+(?:\[[^\[\]]*\])+$/', $key)) {
	$key_pieces = preg_split('/\]?\[/', rtrim($key, ']'));
	if ($key_pieces) {
	$cursor = &$input_arr;
	foreach ($key_pieces as $piece) {
	- if (strlen($piece)) {
	+ if (@strlen($piece)) {
	if (empty($cursor[$piece]) \|\| !is_array($cursor[$piece])) {
	$cursor[$piece] = array();
	}
	diff --git a/src/parser/PhutilSimpleOptions.php b/src/parser/PhutilSimpleOptions.php
	--- a/src/parser/PhutilSimpleOptions.php
	+++ b/src/parser/PhutilSimpleOptions.php
	@@ -50,7 +50,7 @@
	if ($type != 'word') {
	return array();
	}
	- if (!strlen($value)) {
	+ if (!@strlen($value)) {
	return array();
	}
	$key = $this->normalizeKey($value);
	@@ -138,7 +138,7 @@
	$result = array();
	foreach ($options as $name => $value) {
	$name = $this->normalizeKey($name);
	- if (!strlen($value)) {
	+ if (!@strlen($value)) {
	continue;
	}
	if ($value === true) {
	@@ -176,17 +176,17 @@


	private function normalizeKey($key) {
	- if (!strlen($key)) {
	+ if (!@strlen($key)) {
	throw new Exception(pht('Empty key is invalid!'));
	}
	if (!$this->caseSensitive) {
	- $key = strtolower($key);
	+ $key = @strtolower($key);
	}
	return $key;
	}

	private function quoteString($string, $escape) {
	- if (preg_match('/[^a-zA-Z0-9]/', $string)) {
	+ if (@preg_match('/[^a-zA-Z0-9]/', $string)) {
	$string = '"'.addcslashes($string, '\\\'"'.$escape).'"';
	}
	return $string;
	diff --git a/src/parser/PhutilTypeSpec.php b/src/parser/PhutilTypeSpec.php
	--- a/src/parser/PhutilTypeSpec.php
	+++ b/src/parser/PhutilTypeSpec.php
	@@ -80,7 +80,7 @@
	}

	$trap = new PhutilErrorTrap();
	- $ok = @preg_match($value, '');
	+ $ok = @@preg_match($value, '');
	$err = $trap->getErrorsAsString();
	$trap->destroy();

	diff --git a/src/parser/PhutilURI.php b/src/parser/PhutilURI.php
	--- a/src/parser/PhutilURI.php
	+++ b/src/parser/PhutilURI.php
	@@ -50,7 +50,7 @@

	// Reject ambiguous URIs outright. Different versions of different clients
	// parse these in different ways. See T12526 for discussion.
	- if (preg_match('(^[^/:]://[^/][#?].*:)', $uri)) {
	+ if (@preg_match('(^[^/:]://[^/][#?].*:)', $uri)) {
	throw new Exception(
	pht(
	'Rejecting ambiguous URI "%s". This URI is not formatted or '.
	@@ -59,7 +59,7 @@
	}

	$matches = null;
	- if (preg_match('(^([^/:]://[^/])(\\?.*)\z)', $uri, $matches)) {
	+ if (@preg_match('(^([^/:]://[^/])(\\?.*)\z)', $uri, $matches)) {
	// If the URI is something like `idea://open?file=/path/to/file`, the
	// `parse_url()` function will parse `open?file=` as the host. This is
	// not the expected result. Break the URI into two pieces, stick a slash
	@@ -74,7 +74,7 @@
	$host = '(?P<host>[^/:]+)';
	$path = ':(?P<path>.*)';

	- $ok = preg_match('(^'.$user.$host.$path.'\z)', $uri, $matches);
	+ $ok = @preg_match('(^'.$user.$host.$path.'\z)', $uri, $matches);
	if (!$ok) {
	throw new Exception(
	pht(
	@@ -105,8 +105,8 @@
	// hosts beginning with "-".
	if ($parts) {
	$host = idx($parts, 'host', '');
	- if (strlen($host)) {
	- if (!preg_match('/^[a-zA-Z0-9]+[a-zA-Z0-9\\.\\-]*\z/', $host)) {
	+ if (@strlen($host)) {
	+ if (!@preg_match('/^[a-zA-Z0-9]+[a-zA-Z0-9\\.\\-]*\z/', $host)) {
	$parts = false;
	}
	}
	@@ -154,9 +154,9 @@

	$user = $this->user;
	$pass = $this->pass;
	- if (strlen($user) && strlen($pass)) {
	+ if (@strlen($user) && @strlen($pass)) {
	$auth = rawurlencode($user).':'.rawurlencode($pass).'@';
	- } else if (strlen($user)) {
	+ } else if (@strlen($user)) {
	$auth = rawurlencode($user).'@';
	} else {
	$auth = null;
	@@ -166,19 +166,19 @@
	if ($this->isGitURI()) {
	$protocol = null;
	} else {
	- if (strlen($auth)) {
	+ if (@strlen($auth)) {
	$protocol = nonempty($this->protocol, 'http');
	}
	}

	- if (strlen($protocol) \|\| strlen($auth) \|\| strlen($domain)) {
	+ if (@strlen($protocol) \|\| @strlen($auth) \|\| @strlen($domain)) {
	if ($this->isGitURI()) {
	$prefix = "{$auth}{$domain}";
	} else {
	$prefix = "{$protocol}://{$auth}{$domain}";
	}

	- if (strlen($port)) {
	+ if (@strlen($port)) {
	$prefix .= ':'.$port;
	}
	}
	@@ -189,7 +189,7 @@
	$query = null;
	}

	- if (strlen($this->getFragment())) {
	+ if (@strlen($this->getFragment())) {
	$fragment = '#'.$this->getFragment();
	} else {
	$fragment = null;
	@@ -197,7 +197,7 @@

	$path = $this->getPath();
	if ($this->isGitURI()) {
	- if (strlen($path)) {
	+ if (@strlen($path)) {
	$path = ':'.$path;
	}
	}
	@@ -428,7 +428,7 @@
	if ($this->isGitURI()) {
	// Git URIs use relative paths which do not need to begin with "/".
	} else {
	- if ($this->domain && strlen($path) && $path[0] !== '/') {
	+ if ($this->domain && @strlen($path) && $path[0] !== '/') {
	$path = '/'.$path;
	}
	}
	@@ -438,13 +438,13 @@
	}

	public function appendPath($path) {
	- $first = strlen($path) ? $path[0] : null;
	- $last = strlen($this->path) ? $this->path[strlen($this->path) - 1] : null;
	+ $first = @strlen($path) ? $path[0] : null;
	+ $last = @strlen($this->path) ? $this->path[@strlen($this->path) - 1] : null;

	if (!$this->path) {
	return $this->setPath($path);
	} else if ($first === '/' && $last === '/') {
	- $path = substr($path, 1);
	+ $path = @substr($path, 1);
	} else if ($first !== '/' && $last !== '/') {
	$path = '/'.$path;
	}
	@@ -498,7 +498,7 @@

	if ($type == self::TYPE_URI) {
	$path = $this->getPath();
	- if (strlen($path) && ($path[0] !== '/')) {
	+ if (@strlen($path) && ($path[0] !== '/')) {
	// Try to catch this here because we are not allowed to throw from
	// inside __toString() so we don't have a reasonable opportunity to
	// react properly if we catch it later.
	@@ -522,7 +522,7 @@
	private function isGitURIPattern($uri) {
	$matches = null;

	- $ok = preg_match('(^(?P<head>[^/]+):(?P<last>(?!//).*)\z)', $uri, $matches);
	+ $ok = @preg_match('(^(?P<head>[^/]+):(?P<last>(?!//).*)\z)', $uri, $matches);
	if (!$ok) {
	return false;
	}
	@@ -532,20 +532,20 @@

	// If any part of this has spaces in it, it's not a Git URI. We fail here
	// so we fall back and don't fail more abruptly later.
	- if (preg_match('(\s)', $head.$last)) {
	+ if (@preg_match('(\s)', $head.$last)) {
	return false;
	}

	// If the second part only contains digits, assume we're looking at
	// casually specified "domain.com:123" URI, not a Git URI pointed at an
	// entirely numeric relative path.
	- if (preg_match('(^\d+\z)', $last)) {
	+ if (@preg_match('(^\d+\z)', $last)) {
	return false;
	}

	// If the first part has a "." or an "@" in it, interpret it as a domain
	// or a "user@host" string.
	- if (preg_match('([.@])', $head)) {
	+ if (@preg_match('([.@])', $head)) {
	return true;
	}

	diff --git a/src/parser/__tests__/ArcanistBundleTestCase.php b/src/parser/__tests__/ArcanistBundleTestCase.php
	--- a/src/parser/__tests__/ArcanistBundleTestCase.php
	+++ b/src/parser/__tests__/ArcanistBundleTestCase.php
	@@ -100,14 +100,14 @@
	list($commits) = execx(
	'git log --format=%s',
	'%H %T %s');
	- $commits = explode("\n", trim($commits));
	+ $commits = @explode("\n", trim($commits));

	// The very first commit doesn't have a meaningful parent, so don't examine
	// it.
	array_pop($commits);

	foreach ($commits as $commit) {
	- list($commit_hash, $tree_hash, $subject) = explode(' ', $commit, 3);
	+ list($commit_hash, $tree_hash, $subject) = @explode(' ', $commit, 3);
	execx('git reset --hard %s --', $commit_hash);

	$fixture_path = $fixture->getPath();
	@@ -158,7 +158,7 @@
	->write($patch)
	->resolvex();
	} catch (CommandException $ex) {
	- $temp = new TempFile(substr($commit_hash, 0, 8).'.patch');
	+ $temp = new TempFile(@substr($commit_hash, 0, 8).'.patch');
	$temp->setPreserveFile(true);
	Filesystem::writeFile($temp, $patch);

	diff --git a/src/parser/__tests__/ArcanistDiffParserTestCase.php b/src/parser/__tests__/ArcanistDiffParserTestCase.php
	--- a/src/parser/__tests__/ArcanistDiffParserTestCase.php
	+++ b/src/parser/__tests__/ArcanistDiffParserTestCase.php
	@@ -29,9 +29,9 @@
	case 'basic-missing-new-newline.udiff':
	case 'basic-missing-old-newline-plus.udiff':
	case 'basic-missing-old-newline.udiff':
	- $expect_old = strpos($file, '-old-') \|\| strpos($file, '-both-');
	- $expect_new = strpos($file, '-new-') \|\| strpos($file, '-both-');
	- $expect_two = strpos($file, '-plus');
	+ $expect_old = @strpos($file, '-old-') \|\| @strpos($file, '-both-');
	+ $expect_new = @strpos($file, '-new-') \|\| @strpos($file, '-both-');
	+ $expect_two = @strpos($file, '-plus');

	$this->assertEqual(count($changes), $expect_two ? 2 : 1);
	$change = reset($changes);
	@@ -302,8 +302,8 @@
	case 'git-move-edit.gitdiff':
	case 'git-move-plus.gitdiff':

	- $extra_changeset = (bool)strpos($file, '-plus');
	- $has_hunk = (bool)strpos($file, '-edit');
	+ $extra_changeset = (bool)@strpos($file, '-plus');
	+ $has_hunk = (bool)@strpos($file, '-edit');

	$this->assertEqual($extra_changeset ? 3 : 2, count($changes));

	diff --git a/src/parser/__tests__/PhutilLanguageGuesserTestCase.php b/src/parser/__tests__/PhutilLanguageGuesserTestCase.php
	--- a/src/parser/__tests__/PhutilLanguageGuesserTestCase.php
	+++ b/src/parser/__tests__/PhutilLanguageGuesserTestCase.php
	@@ -7,8 +7,8 @@
	foreach (Filesystem::listDirectory($dir, $hidden = false) as $test) {
	$source = Filesystem::readFile($dir.$test);

	- if (strpos($test, '.') !== false) {
	- $expect = head(explode('.', $test));
	+ if (@strpos($test, '.') !== false) {
	+ $expect = head(@explode('.', $test));
	} else {
	$expect = null;
	}
	diff --git a/src/parser/aast/api/AASTNode.php b/src/parser/aast/api/AASTNode.php
	--- a/src/parser/aast/api/AASTNode.php
	+++ b/src/parser/aast/api/AASTNode.php
	@@ -289,7 +289,7 @@

	while ($left &&
	(!$left->isAnyWhitespace() \|\|
	- strpos($left->getValue(), "\n") === false)) {
	+ @strpos($left->getValue(), "\n") === false)) {
	$left = $left->getPrevToken();
	}

	@@ -302,8 +302,8 @@

	public function getDescription() {
	$concrete = $this->getConcreteString();
	- if (strlen($concrete) > 75) {
	- $concrete = substr($concrete, 0, 36).'...'.substr($concrete, -36);
	+ if (@strlen($concrete) > 75) {
	+ $concrete = @substr($concrete, 0, 36).'...'.@substr($concrete, -36);
	}

	$concrete = addcslashes($concrete, "\\\n\"");
	diff --git a/src/parser/aast/api/AASTTree.php b/src/parser/aast/api/AASTTree.php
	--- a/src/parser/aast/api/AASTTree.php
	+++ b/src/parser/aast/api/AASTTree.php
	@@ -32,7 +32,7 @@
	$this->stream[$ii] = $this->newToken(
	$ii,
	$token[0],
	- substr($source, $offset, $token[1]),
	+ @substr($source, $offset, $token[1]),
	$offset,
	$this);
	$offset += $token[1];
	@@ -177,7 +177,7 @@
	public function getOffsetToLineNumberMap() {
	if ($this->lineMap === null) {
	$src = $this->rawSource;
	- $len = strlen($src);
	+ $len = @strlen($src);
	$lno = 1;
	$map = array();
	for ($ii = 0; $ii < $len; ++$ii) {
	diff --git a/src/parser/argument/PhutilArgumentParser.php b/src/parser/argument/PhutilArgumentParser.php
	--- a/src/parser/argument/PhutilArgumentParser.php
	+++ b/src/parser/argument/PhutilArgumentParser.php
	@@ -166,12 +166,12 @@
	continue;
	} else if (!strncmp('--', $arg, 2)) {
	$pre = '--';
	- $arg = substr($arg, 2);
	+ $arg = @substr($arg, 2);
	$map = $specs_by_name;
	$options = array_keys($specs_by_name);
	- } else if (!strncmp('-', $arg, 1) && strlen($arg) > 1) {
	+ } else if (!strncmp('-', $arg, 1) && @strlen($arg) > 1) {
	$pre = '-';
	- $arg = substr($arg, 1);
	+ $arg = @substr($arg, 1);
	$map = $specs_by_short;
	} else {
	$is_initial = false;
	@@ -179,7 +179,7 @@

	if ($map) {
	$val = null;
	- $parts = explode('=', $arg, 2);
	+ $parts = @explode('=', $arg, 2);
	if (count($parts) == 2) {
	list($arg, $val) = $parts;
	}
	@@ -256,7 +256,7 @@
	foreach ($conflicts as $conflict => $reason) {
	if (array_key_exists($conflict, $this->results)) {

	- if (!is_string($reason) \|\| !strlen($reason)) {
	+ if (!is_string($reason) \|\| !@strlen($reason)) {
	$reason = '.';
	} else {
	$reason = ': '.$reason.'.';
	@@ -762,7 +762,7 @@
	$workflows = $this->workflows;
	}

	- $workflow = idx($workflows, strtolower($workflow_name));
	+ $workflow = idx($workflows, @strtolower($workflow_name));
	if (!$workflow) {
	$out[] = $this->indent(
	$indent,
	@@ -815,7 +815,7 @@
	} else if (
	is_string($value) &&
	!strncmp($value, '-', 1) &&
	- strlen($value) > 1) {
	+ @strlen($value) > 1) {

	throw new PhutilArgumentUsageException(
	pht(
	diff --git a/src/parser/argument/PhutilArgumentSpecification.php b/src/parser/argument/PhutilArgumentSpecification.php
	--- a/src/parser/argument/PhutilArgumentSpecification.php
	+++ b/src/parser/argument/PhutilArgumentSpecification.php
	@@ -119,7 +119,7 @@
	}

	private static function validateName($name) {
	- if (!preg_match('/^[a-z0-9][a-z0-9-]*$/', $name)) {
	+ if (!@preg_match('/^[a-z0-9][a-z0-9-]*$/', $name)) {
	throw new PhutilArgumentSpecificationException(
	pht(
	"Argument names may only contain a-z, 0-9 and -, and must be ".
	@@ -148,14 +148,14 @@
	}

	private static function validateShortAlias($alias) {
	- if (strlen($alias) !== 1) {
	+ if (@strlen($alias) !== 1) {
	throw new PhutilArgumentSpecificationException(
	pht(
	"Argument short aliases must be exactly one character long. ".
	"'%s' is invalid.",
	$alias));
	}
	- if (!preg_match('/^[a-zA-Z0-9]$/', $alias)) {
	+ if (!@preg_match('/^[a-zA-Z0-9]$/', $alias)) {
	throw new PhutilArgumentSpecificationException(
	pht(
	"Argument short aliases may only be in a-z, A-Z and 0-9. ".
	diff --git a/src/parser/argument/PhutilArgumentSpellingCorrector.php b/src/parser/argument/PhutilArgumentSpellingCorrector.php
	--- a/src/parser/argument/PhutilArgumentSpellingCorrector.php
	+++ b/src/parser/argument/PhutilArgumentSpellingCorrector.php
	@@ -105,7 +105,7 @@
	// If we're correcting commands, never correct an input which begins
	// with "-", since this is almost certainly intended to be a flag.
	if ($this->getMode() === self::MODE_COMMANDS) {
	- if (preg_match('/^-/', $input)) {
	+ if (@preg_match('/^-/', $input)) {
	return array();
	}
	}
	@@ -120,7 +120,7 @@
	if ($this->getMode() === self::MODE_COMMANDS) {
	$prefixes = array();
	foreach ($options as $option) {
	- if (!strncmp($input, $option, strlen($input))) {
	+ if (!strncmp($input, $option, @strlen($input))) {
	$prefixes[] = $option;
	}
	}
	@@ -155,7 +155,7 @@
	}

	foreach ($distances as $option => $distance) {
	- if (phutil_utf8_strlen($option) < $distance) {
	+ if (phutil_utf8strlen($option) < $distance) {
	unset($distances[$option]);
	}
	}
	diff --git a/src/parser/diff/ArcanistDiffChange.php b/src/parser/diff/ArcanistDiffChange.php
	--- a/src/parser/diff/ArcanistDiffChange.php
	+++ b/src/parser/diff/ArcanistDiffChange.php
	@@ -216,9 +216,9 @@
	$new = $hunk->getNewOffset();
	$olds = array();
	$news = array();
	- $lines = explode("\n", $hunk->getCorpus());
	+ $lines = @explode("\n", $hunk->getCorpus());
	foreach ($lines as $line) {
	- $type = substr($line, 0, 1);
	+ $type = @substr($line, 0, 1);
	if ($type == '-' \|\| $type == ' ') {
	$olds[] = $old;
	$old++;
	@@ -298,7 +298,7 @@
	$hunk = reset($hunks);
	$corpus = $hunk->getCorpus();
	$match = null;
	- if (!preg_match('/^\+(?:link )?(.*)$/m', $corpus, $match)) {
	+ if (!@preg_match('/^\+(?:link )?(.*)$/m', $corpus, $match)) {
	throw new Exception(pht('Failed to extract link target!'));
	}
	return trim($match[1]);
	diff --git a/src/parser/diff/ArcanistDiffHunk.php b/src/parser/diff/ArcanistDiffHunk.php
	--- a/src/parser/diff/ArcanistDiffHunk.php
	+++ b/src/parser/diff/ArcanistDiffHunk.php
	@@ -52,8 +52,8 @@

	$oline = $this->getOldOffset();
	$nline = $this->getNewOffset();
	- foreach (explode("\n", $this->getCorpus()) as $line) {
	- $char = strlen($line) ? $line[0] : '~';
	+ foreach (@explode("\n", $this->getCorpus()) as $line) {
	+ $char = @strlen($line) ? $line[0] : '~';
	switch ($char) {
	case '-':
	$old_map[$oline] = true;
	diff --git a/src/parser/html/PhutilDOMNode.php b/src/parser/html/PhutilDOMNode.php
	--- a/src/parser/html/PhutilDOMNode.php
	+++ b/src/parser/html/PhutilDOMNode.php
	@@ -193,7 +193,7 @@
	}
	$parts = implode('', $parts);

	- if (!strlen($parts)) {
	+ if (!@strlen($parts)) {
	continue;
	}

	diff --git a/src/parser/html/PhutilHTMLParser.php b/src/parser/html/PhutilHTMLParser.php
	--- a/src/parser/html/PhutilHTMLParser.php
	+++ b/src/parser/html/PhutilHTMLParser.php
	@@ -13,7 +13,7 @@
	$segments = array();
	$in_tag = false;

	- for ($ii = 0; $ii < strlen($corpus); $ii++) {
	+ for ($ii = 0; $ii < @strlen($corpus); $ii++) {
	$c = $corpus[$ii];

	if ($in_tag && ($c === '>')) {
	@@ -59,7 +59,7 @@
	// "tag" strings and a list of "non-tag" strings.

	$parts = array();
	- $corpus_length = strlen($corpus);
	+ $corpus_length = @strlen($corpus);
	foreach ($segments as $segment) {
	$tag = $segment['tag'];
	$pos = $segment['pos'];
	@@ -76,7 +76,7 @@
	}

	if (($slice_pos < $corpus_length) && ($slice_len > 0)) {
	- $content = substr($corpus, $slice_pos, $slice_len);
	+ $content = @substr($corpus, $slice_pos, $slice_len);
	} else {
	$content = '';
	}
	@@ -127,16 +127,16 @@
	$content = $raw_content;

	$content = trim($content);
	- $content_len = strlen($content);
	+ $content_len = @strlen($content);

	// If the tag content begins with "/", like "</td>", strip the slash
	// off and mark this as a closing tag.
	$is_close = false;
	if ($content_len > 0 && $content[0] === '/') {
	$is_close = true;
	- $content = substr($content, 1);
	+ $content = @substr($content, 1);
	$content = trim($content);
	- $content_len = strlen($content);
	+ $content_len = @strlen($content);
	}

	// If the tag content ends with "/", like "<td />", strip the slash off
	@@ -144,9 +144,9 @@
	$self_close = false;
	if ($content_len > 0 && $content[$content_len - 1] === '/') {
	$self_close = true;
	- $content = substr($content, 0, $content_len - 1);
	+ $content = @substr($content, 0, $content_len - 1);
	$content = trim($content);
	- $content_len = strlen($content);
	+ $content_len = @strlen($content);
	}

	// If this tag is both a closing tag and a self-closing tag, it is
	@@ -166,13 +166,13 @@
	}

	// If there's no tag name, this tag is not valid. Treat it as content.
	- if (!strlen($tag_name)) {
	+ if (!@strlen($tag_name)) {
	return null;
	}

	// If this is a closing tag with attributes, it's not valid. Treat it
	// as content.
	- if ($is_close && strlen($attributes)) {
	+ if ($is_close && @strlen($attributes)) {
	return null;
	}

	@@ -200,7 +200,7 @@
	return null;
	}

	- if (strlen($attributes)) {
	+ if (@strlen($attributes)) {
	$attribute_map = $this->parseAttributes($attributes);
	// If the attributes can't be parsed, treat the tag as content.
	if ($attribute_map === null) {
	@@ -245,7 +245,7 @@
	);

	$map = array();
	- $len = strlen($attributes);
	+ $len = @strlen($attributes);
	$key_pos = null;
	for ($ii = 0; $ii < $len; $ii++) {
	$c = $attributes[$ii];
	@@ -283,7 +283,7 @@
	// Finding a "=" or a space character ends the attribute name.
	// Save it, then figure out what to do with the parser state.
	if ($c === '=' \|\| $is_space) {
	- $name_value = substr($attributes, $name_pos, $ii - $name_pos);
	+ $name_value = @substr($attributes, $name_pos, $ii - $name_pos);
	$name_value = phutil_utf8_strtolower($name_value);

	// If this attribute already exists, the tag is invalid. This means
	@@ -362,7 +362,7 @@

	// We found the closing quote, so pull out the actual value.
	if ($c === '"') {
	- $attr_value = substr($attributes, $value_pos, $ii - $value_pos);
	+ $attr_value = @substr($attributes, $value_pos, $ii - $value_pos);

	$map[$name_value] = $attr_value;
	$state = 'key';
	@@ -377,7 +377,7 @@

	// We've found some whitespace, so pull out the actual value.
	if ($is_space) {
	- $attr_value = substr($attributes, $value_pos, $ii - $value_pos);
	+ $attr_value = @substr($attributes, $value_pos, $ii - $value_pos);

	$map[$name_value] = $attr_value;
	$state = 'key';
	@@ -397,7 +397,7 @@
	case 'name':
	// We were looking for the end of an attribute name. Treat whatever
	// we found as a name.
	- $name_value = substr($attributes, $name_pos, $len - $name_pos);
	+ $name_value = @substr($attributes, $name_pos, $len - $name_pos);

	if (isset($map[$name_value])) {
	return null;
	@@ -422,7 +422,7 @@
	// the delimiter or closing quote. Treat whatever we found as a quoted
	// value.

	- $attr_value = substr($attributes, $value_pos, $len - $name_pos);
	+ $attr_value = @substr($attributes, $value_pos, $len - $name_pos);

	$map[$name_value] = $attr_value;
	break;
	diff --git a/src/parser/html/__tests__/PhutilHTMLParserTestCase.php b/src/parser/html/__tests__/PhutilHTMLParserTestCase.php
	--- a/src/parser/html/__tests__/PhutilHTMLParserTestCase.php
	+++ b/src/parser/html/__tests__/PhutilHTMLParserTestCase.php
	@@ -12,7 +12,7 @@
	$path = $root.$test;
	$data = Filesystem::readFile($path);

	- $parts = explode("\n~~~~~~~~~~\n", $data);
	+ $parts = @explode("\n~~~~~~~~~~\n", $data);
	if (count($parts) !== 2) {
	throw new Exception(
	pht(
	diff --git a/src/parser/http/PhutilHTTPResponse.php b/src/parser/http/PhutilHTTPResponse.php
	--- a/src/parser/http/PhutilHTTPResponse.php
	+++ b/src/parser/http/PhutilHTTPResponse.php
	@@ -33,7 +33,7 @@
	public function appendBody($bytes) {
	if ($this->writeHandle !== null) {
	$result = @fwrite($this->writeHandle, $bytes);
	- if ($result !== strlen($bytes)) {
	+ if ($result !== @strlen($bytes)) {
	throw new Exception(
	pht('Failed to write response to disk. (Maybe the disk is full?)'));
	}
	diff --git a/src/parser/http/PhutilHTTPResponseParser.php b/src/parser/http/PhutilHTTPResponseParser.php
	--- a/src/parser/http/PhutilHTTPResponseParser.php
	+++ b/src/parser/http/PhutilHTTPResponseParser.php
	@@ -48,7 +48,7 @@
	if ($this->state == 'headers') {
	$matches = null;

	- $ok = preg_match(
	+ $ok = @preg_match(
	"/(\r?\n\r?\n)/",
	$this->buffer,
	$matches,
	@@ -58,16 +58,16 @@
	}

	$headers_len = $matches[1][1];
	- $boundary_len = strlen($matches[1][0]);
	- $raw_headers = substr($this->buffer, 0, $headers_len);
	- $this->buffer = substr($this->buffer, $headers_len + $boundary_len);
	+ $boundary_len = @strlen($matches[1][0]);
	+ $raw_headers = @substr($this->buffer, 0, $headers_len);
	+ $this->buffer = @substr($this->buffer, $headers_len + $boundary_len);

	$header_lines = phutil_split_lines($raw_headers);
	$first_line = array_shift($header_lines);
	$response_valid = true;

	$matches = null;
	- $ok = preg_match(
	+ $ok = @preg_match(
	'(^HTTP/\S+\s+(\d+)(?:\s+(.*))?$)i',
	$first_line,
	$matches);
	@@ -82,14 +82,14 @@
	$header_list = array();
	$saw_location = false;
	foreach ($header_lines as $header_line) {
	- $pos = strpos($header_line, ':');
	+ $pos = @strpos($header_line, ':');
	if ($pos === false) {
	$response_valid = false;
	break;
	}

	- $name = substr($header_line, 0, $pos);
	- $value = ltrim(substr($header_line, $pos + 1), ' ');
	+ $name = @substr($header_line, 0, $pos);
	+ $value = ltrim(@substr($header_line, $pos + 1), ' ');

	if (phutil_utf8_strtolower($name) == 'location') {
	$saw_location = true;
	@@ -163,7 +163,7 @@
	}

	if ($this->state == 'body') {
	- if (strlen($this->buffer)) {
	+ if (@strlen($this->buffer)) {
	$bytes = $this->buffer;
	$this->buffer = '';

	@@ -171,7 +171,7 @@

	$sink = $this->getProgressSink();
	if ($sink) {
	- $sink->didMakeProgress(strlen($bytes));
	+ $sink->didMakeProgress(@strlen($bytes));
	}
	}
	break;
	diff --git a/src/parser/http/__tests__/PhutilHTTPResponseParserTestCase.php b/src/parser/http/__tests__/PhutilHTTPResponseParserTestCase.php
	--- a/src/parser/http/__tests__/PhutilHTTPResponseParserTestCase.php
	+++ b/src/parser/http/__tests__/PhutilHTTPResponseParserTestCase.php
	@@ -98,11 +98,11 @@
	}

	// Submit the input in little bits to try to catch any weird parser bugs.
	- $length = strlen($input);
	+ $length = @strlen($input);
	$pos = 0;
	while ($pos < $length) {
	$next_len = mt_rand(1, 32);
	- $piece = substr($input, $pos, $next_len);
	+ $piece = @substr($input, $pos, $next_len);
	$pos = $pos + $next_len;

	$parser->readBytes($piece);
	diff --git a/src/parser/xhpast/__tests__/PHPASTParserTestCase.php b/src/parser/xhpast/__tests__/PHPASTParserTestCase.php
	--- a/src/parser/xhpast/__tests__/PHPASTParserTestCase.php
	+++ b/src/parser/xhpast/__tests__/PHPASTParserTestCase.php
	@@ -14,7 +14,7 @@

	$dir = dirname(__FILE__).'/data/';
	foreach (Filesystem::listDirectory($dir) as $file) {
	- if (preg_match('/\.test$/', $file)) {
	+ if (@preg_match('/\.test$/', $file)) {
	$this->executeParserTest($file, $dir.$file);
	}
	}
	@@ -82,7 +82,7 @@
	case 'pass':
	$this->assertEqual(0, $err, pht('Exit code for "%s".', $name));

	- if (!strlen($expect)) {
	+ if (!@strlen($expect)) {
	// If there's no "expect" data in the test case, that's OK.
	break;
	}
	@@ -107,7 +107,7 @@
	case 'fail-syntax':
	$this->assertEqual(1, $err, pht('Exit code for "%s".', $name));
	$this->assertTrue(
	- (bool)preg_match('/syntax error/', $stderr),
	+ (bool)@preg_match('/syntax error/', $stderr),
	pht('Expect "syntax error" in stderr or "%s".', $name));
	break;
	default:
	@@ -244,17 +244,17 @@
	$must_escape = false;

	// We must escape the text if it isn't just simple printable characters.
	- if (preg_match('/[ \\\\\\r\\n\\t\\"]/', $text)) {
	+ if (@preg_match('/[ \\\\\\r\\n\\t\\"]/', $text)) {
	$must_escape = true;
	}

	// We must escape the text if it has trailing whitespace.
	- if (preg_match('/ \z/', $text)) {
	+ if (@preg_match('/ \z/', $text)) {
	$must_escape = true;
	}

	// We must escape the text if it won't fit on a single line.
	- if (strlen($text) > $usable_width) {
	+ if (@strlen($text) > $usable_width) {
	$must_escape = true;
	}

	@@ -282,14 +282,14 @@
	$line_l = '"';
	$line_r = '"';

	- $max_width = ($usable_width - strlen($line_l) - strlen($line_r));
	+ $max_width = ($usable_width - @strlen($line_l) - @strlen($line_r));

	$line = '';
	$len = 0;

	$lines = array();
	foreach ($vector as $word) {
	- $word_length = phutil_utf8_console_strlen($word);
	+ $word_length = phutil_utf8_consolestrlen($word);

	if ($len + $word_length > $max_width) {
	$lines[] = $line_l.$line.$line_r;
	diff --git a/src/parser/xhpast/api/XHPASTNode.php b/src/parser/xhpast/api/XHPASTNode.php
	--- a/src/parser/xhpast/api/XHPASTNode.php
	+++ b/src/parser/xhpast/api/XHPASTNode.php
	@@ -38,12 +38,12 @@
	return phutil_string_cast($this->getStringLiteralValue());
	case 'n_NUMERIC_SCALAR':
	$value = $this->getSemanticString();
	- if (preg_match('/^0x/i', $value)) {
	+ if (@preg_match('/^0x/i', $value)) {
	// Hex
	- $value = base_convert(substr($value, 2), 16, 10);
	- } else if (preg_match('/^0\d+$/i', $value)) {
	+ $value = base_convert(@substr($value, 2), 16, 10);
	+ } else if (@preg_match('/^0\d+$/i', $value)) {
	// Octal
	- $value = base_convert(substr($value, 1), 8, 10);
	+ $value = base_convert(@substr($value, 1), 8, 10);
	}
	return +$value;
	case 'n_SYMBOL_NAME':
	@@ -51,7 +51,7 @@
	if ($value == 'INF') {
	return INF;
	}
	- switch (strtolower($value)) {
	+ switch (@strtolower($value)) {
	case 'true':
	return true;
	case 'false':
	@@ -146,7 +146,7 @@

	switch ($this->getTypeName()) {
	case 'n_HEREDOC':
	- if (preg_match("/^<<<\s*'/", $value)) { // Nowdoc: <<<'EOT'
	+ if (@preg_match("/^<<<\s*'/", $value)) { // Nowdoc: <<<'EOT'
	return array();
	}
	break;
	@@ -229,7 +229,7 @@
	// literally "\q" and "\'". stripcslashes() is too aggressive, so find
	// all these under-escaped backslashes and escape them.

	- $len = strlen($value);
	+ $len = @strlen($value);
	$esc = false;
	$out = '';

	@@ -240,7 +240,7 @@
	switch ($c) {
	case 'x':
	$u = isset($value[$ii + 1]) ? $value[$ii + 1] : null;
	- if (!preg_match('/^[a-f0-9]/i', $u)) {
	+ if (!@preg_match('/^[a-f0-9]/i', $u)) {
	// PHP treats \x followed by anything which is not a hex digit
	// as a literal \x.
	$out .= '\\\\'.$c;
	diff --git a/src/parser/xhpast/api/XHPASTTree.php b/src/parser/xhpast/api/XHPASTTree.php
	--- a/src/parser/xhpast/api/XHPASTTree.php
	+++ b/src/parser/xhpast/api/XHPASTTree.php
	@@ -47,7 +47,7 @@
	if ($err) {
	if ($err == 1) {
	$matches = null;
	- $is_syntax = preg_match(
	+ $is_syntax = @preg_match(
	'/^XHPAST Parse Error: (.*) on line (\d+)/s',
	$stderr,
	$matches);
	diff --git a/src/phage/action/PhageAgentAction.php b/src/phage/action/PhageAgentAction.php
	--- a/src/phage/action/PhageAgentAction.php
	+++ b/src/phage/action/PhageAgentAction.php
	@@ -228,7 +228,7 @@
	}

	private function writeOutput($key, $kind, $text) {
	- if (!strlen($text)) {
	+ if (!@strlen($text)) {
	return;
	}

	@@ -246,7 +246,7 @@
	$command = $this->commands[$key]['command'];

	$label = $command->getLabel();
	- if (!strlen($label)) {
	+ if (!@strlen($label)) {
	$label = pht('Unknown Command');
	}

	diff --git a/src/phage/agent/PhagePHPAgent.php b/src/phage/agent/PhagePHPAgent.php
	--- a/src/phage/agent/PhagePHPAgent.php
	+++ b/src/phage/agent/PhagePHPAgent.php
	@@ -112,7 +112,7 @@
	list($stdout, $stderr) = $future->read();
	$future->discardBuffers();

	- if (strlen($stdout)) {
	+ if (@strlen($stdout)) {
	$master->write(
	array(
	'type' => 'TEXT',
	@@ -122,7 +122,7 @@
	));
	}

	- if (strlen($stderr)) {
	+ if (@strlen($stderr)) {
	$master->write(
	array(
	'type' => 'TEXT',
	diff --git a/src/phage/bootloader/PhagePHPAgentBootloader.php b/src/phage/bootloader/PhagePHPAgentBootloader.php
	--- a/src/phage/bootloader/PhagePHPAgentBootloader.php
	+++ b/src/phage/bootloader/PhagePHPAgentBootloader.php
	@@ -70,15 +70,15 @@
	// what's going on here, but just sweep it under the rug for now.

	$main_sequence->addText('$A = new PhagePHPAgent($I); $A->execute();');
	- $main_length = strlen($main_sequence->toString());
	+ $main_length = @strlen($main_sequence->toString());

	$boot_sequence = new PhutilBallOfPHP();
	$boot = '
	$length = '.$main_length.';
	$buffer = "";
	- while (strlen($buffer) < $length) {
	- $data = fread($I, $length - strlen($buffer));
	- if (!strlen($data)) {
	+ while (@strlen($buffer) < $length) {
	+ $data = fread($I, $length - @strlen($buffer));
	+ if (!@strlen($data)) {
	exit(1);
	}
	$buffer .= $data;
	@@ -86,10 +86,10 @@

	eval($buffer);';
	$boot_sequence->addText($boot);
	- $boot_length = strlen($boot_sequence->toString());
	+ $boot_length = @strlen($boot_sequence->toString());
	$boot_sequence->addText($main_sequence->toString());

	- if (strlen($boot_length) > 8192) {
	+ if (@strlen($boot_length) > 8192) {
	throw new Exception(pht('Stage 1 bootloader is too large!'));
	}

	diff --git a/src/phage/util/PhutilBallOfPHP.php b/src/phage/util/PhutilBallOfPHP.php
	--- a/src/phage/util/PhutilBallOfPHP.php
	+++ b/src/phage/util/PhutilBallOfPHP.php
	@@ -17,7 +17,7 @@
	$path,
	'<?php\n'));
	}
	- $this->parts[] = substr($data, 6);
	+ $this->parts[] = @substr($data, 6);
	return $this;
	}

	diff --git a/src/progress/PhutilConsoleProgressSink.php b/src/progress/PhutilConsoleProgressSink.php
	--- a/src/progress/PhutilConsoleProgressSink.php
	+++ b/src/progress/PhutilConsoleProgressSink.php
	@@ -97,13 +97,13 @@
	$tail = '';

	if ($this->lineWidth) {
	- $line_len = strlen($line);
	+ $line_len = @strlen($line);

	if ($line_len < $this->lineWidth) {
	$tail = str_repeat(' ', $this->lineWidth - $line_len);
	}

	- $this->lineWidth = strlen($line);
	+ $this->lineWidth = @strlen($line);
	}

	$this->printLine($head.$line.$tail);
	diff --git a/src/readableserializer/PhutilReadableSerializer.php b/src/readableserializer/PhutilReadableSerializer.php
	--- a/src/readableserializer/PhutilReadableSerializer.php
	+++ b/src/readableserializer/PhutilReadableSerializer.php
	@@ -67,11 +67,11 @@
	// yet.
	$limit = 1024;
	$str = self::printableValue($value);
	- if (strlen($str) > $limit) {
	+ if (@strlen($str) > $limit) {
	if (is_string($value)) {
	- $str = "'".substr($str, 1, $limit)."...'";
	+ $str = "'".@substr($str, 1, $limit)."...'";
	} else {
	- $str = substr($str, 0, $limit).'...';
	+ $str = @substr($str, 0, $limit).'...';
	}
	}

	@@ -177,7 +177,7 @@
	* @task internal
	*/
	private static function addIndentation($value, $indent, $first_line) {
	- $lines = explode("\n", $value);
	+ $lines = @explode("\n", $value);
	$out = array();
	foreach ($lines as $index => $line) {
	$out[] = $index >= $first_line ? $indent.$line : $line;
	diff --git a/src/ref/ArcanistRefView.php b/src/ref/ArcanistRefView.php
	--- a/src/ref/ArcanistRefView.php
	+++ b/src/ref/ArcanistRefView.php
	@@ -73,7 +73,7 @@
	$title = $this->getTitle();

	if ($object_name !== null) {
	- $reserve_width = phutil_utf8_console_strlen($object_name) + 1;
	+ $reserve_width = phutil_utf8_consolestrlen($object_name) + 1;
	} else {
	$reserve_width = 0;
	}
	@@ -83,7 +83,7 @@
	} else {
	$indent_text = '';
	}
	- $indent_width = strlen($indent_text);
	+ $indent_width = @strlen($indent_text);

	$marker_width = 6;
	$display_width = phutil_console_get_terminal_width();
	@@ -103,7 +103,7 @@
	->truncateString($title);

	if ($object_name !== null) {
	- if (strlen($title)) {
	+ if (@strlen($title)) {
	$display_text = tsprintf('%s %s', $object_name, $title);
	} else {
	$display_text = tsprintf('%s', $object_name);
	diff --git a/src/ref/ArcanistRepositoryRef.php b/src/ref/ArcanistRepositoryRef.php
	--- a/src/ref/ArcanistRepositoryRef.php
	+++ b/src/ref/ArcanistRepositoryRef.php
	@@ -66,7 +66,7 @@
	));

	foreach ($params as $key => $value) {
	- if (!strlen($value)) {
	+ if (!@strlen($value)) {
	unset($params[$key]);
	}
	}
	@@ -129,8 +129,8 @@
	$ref_name = $ref->getName();
	foreach ($rules as $rule) {
	$matches = null;
	- if (preg_match('(^regexp\$(.*)\$\z)', $rule, $matches)) {
	- if (preg_match($matches[1], $ref_name)) {
	+ if (@preg_match('(^regexp\$(.*)\$\z)', $rule, $matches)) {
	+ if (@preg_match($matches[1], $ref_name)) {
	return true;
	}
	} else {
	diff --git a/src/ref/commit/ArcanistGitCommitSymbolCommitHardpointQuery.php b/src/ref/commit/ArcanistGitCommitSymbolCommitHardpointQuery.php
	--- a/src/ref/commit/ArcanistGitCommitSymbolCommitHardpointQuery.php
	+++ b/src/ref/commit/ArcanistGitCommitSymbolCommitHardpointQuery.php
	@@ -48,7 +48,7 @@

	$pairs = array_combine($symbol_set, $lines);
	foreach ($pairs as $symbol => $line) {
	- $parts = explode(' ', $line, 3);
	+ $parts = @explode(' ', $line, 3);

	if (count($parts) < 2) {
	throw new Exception(
	@@ -91,7 +91,7 @@
	}

	private function validateSymbol($symbol) {
	- if (strpos($symbol, "\n") !== false) {
	+ if (@strpos($symbol, "\n") !== false) {
	throw new Exception(
	pht(
	'Commit symbol "%s" contains a newline. This is not a valid '.
	diff --git a/src/ref/simple/ArcanistSimpleSymbolRef.php b/src/ref/simple/ArcanistSimpleSymbolRef.php
	--- a/src/ref/simple/ArcanistSimpleSymbolRef.php
	+++ b/src/ref/simple/ArcanistSimpleSymbolRef.php
	@@ -28,7 +28,7 @@

	$id_pattern = '(^'.$prefix_pattern.'([1-9]\d*)\z)';

	- $is_id = preg_match($id_pattern, $symbol, $matches);
	+ $is_id = @preg_match($id_pattern, $symbol, $matches);
	if ($is_id) {
	$this->type = self::TYPE_ID;
	return (int)$matches[1];
	@@ -37,7 +37,7 @@
	$phid_type = $this->getSimpleSymbolPHIDType();
	$phid_type = preg_quote($phid_type);
	$phid_pattern = '(^PHID-'.$phid_type.'-\S+\z)';
	- $is_phid = preg_match($phid_pattern, $symbol, $matches);
	+ $is_phid = @preg_match($phid_pattern, $symbol, $matches);
	if ($is_phid) {
	$this->type = self::TYPE_PHID;
	return $matches[0];
	diff --git a/src/ref/user/ArcanistUserRef.php b/src/ref/user/ArcanistUserRef.php
	--- a/src/ref/user/ArcanistUserRef.php
	+++ b/src/ref/user/ArcanistUserRef.php
	@@ -49,7 +49,7 @@

	protected function buildRefView(ArcanistRefView $view) {
	$real_name = $this->getRealName();
	- if (strlen($real_name)) {
	+ if (@strlen($real_name)) {
	$real_name = sprintf('(%s)', $real_name);
	}

	diff --git a/src/ref/user/ArcanistUserSymbolRef.php b/src/ref/user/ArcanistUserSymbolRef.php
	--- a/src/ref/user/ArcanistUserSymbolRef.php
	+++ b/src/ref/user/ArcanistUserSymbolRef.php
	@@ -27,25 +27,25 @@
	protected function resolveSymbol($symbol) {
	$matches = null;

	- $is_id = preg_match('/^([1-9]\d*)\z/', $symbol, $matches);
	+ $is_id = @preg_match('/^([1-9]\d*)\z/', $symbol, $matches);
	if ($is_id) {
	$this->type = self::TYPE_ID;
	return (int)$matches[1];
	}

	- $is_phid = preg_match('/^PHID-USER-\S+\z/', $symbol, $matches);
	+ $is_phid = @preg_match('/^PHID-USER-\S+\z/', $symbol, $matches);
	if ($is_phid) {
	$this->type = self::TYPE_PHID;
	return $matches[0];
	}

	- $is_function = preg_match('/^\S+$\s$\s\z/', $symbol, $matches);
	+ $is_function = @preg_match('/^\S+$\s$\s\z/', $symbol, $matches);
	if ($is_function) {
	$this->type = self::TYPE_FUNCTION;
	return $matches[0];
	}

	- $is_username = preg_match('/^@?(\S+)\z/', $symbol, $matches);
	+ $is_username = @preg_match('/^@?(\S+)\z/', $symbol, $matches);
	if ($is_username) {
	$this->type = self::TYPE_USERNAME;
	return $matches[1];
	diff --git a/src/repository/api/ArcanistGitAPI.php b/src/repository/api/ArcanistGitAPI.php
	--- a/src/repository/api/ArcanistGitAPI.php
	+++ b/src/repository/api/ArcanistGitAPI.php
	@@ -163,7 +163,7 @@
	}

	// NOTE: Windows escaping of "%" symbols apparently is inherently broken;
	- // when passed through escapeshellarg() they are replaced with spaces.
	+ // when passed through @escapeshellarg() they are replaced with spaces.

	// TODO: Learn how cmd.exe works and find some clever workaround?

	@@ -180,20 +180,20 @@
	$commits = array();

	$info = trim($info, " \n\2");
	- if (!strlen($info)) {
	+ if (!@strlen($info)) {
	return array();
	}

	- $info = explode("\2", $info);
	+ $info = @explode("\2", $info);
	foreach ($info as $line) {
	list($commit, $tree, $parents, $time, $author, $author_email,
	- $title, $message) = explode("\1", trim($line), 8);
	+ $title, $message) = @explode("\1", trim($line), 8);
	$message = rtrim($message);

	$commits[$commit] = array(
	'commit' => $commit,
	'tree' => $tree,
	- 'parents' => array_filter(explode(' ', $parents)),
	+ 'parents' => array_filter(@explode(' ', $parents)),
	'time' => $time,
	'author' => $author,
	'summary' => $title,
	@@ -351,7 +351,7 @@
	$prompt = pht('What default do you want to use? [origin/master]');
	$default = phutil_console_prompt($prompt);

	- if (!strlen(trim($default))) {
	+ if (!@strlen(trim($default))) {
	$default = 'origin/master';
	}

	@@ -512,7 +512,7 @@
	return null;
	}

	- if (!strlen($branch)) {
	+ if (!@strlen($branch)) {
	return null;
	}

	@@ -600,7 +600,7 @@
	public function getCanonicalRevisionName($string) {
	$match = null;

	- if (preg_match('/@([0-9]+)$/', $string, $match)) {
	+ if (@preg_match('/@([0-9]+)$/', $string, $match)) {
	$stdout = $this->getHashFromFromSVNRevisionNumber($match[1]);
	} else {
	list($stdout) = $this->execxLocal(
	@@ -626,7 +626,7 @@
	}
	// When git performs a partial-rebuild during svn
	// look-up, we need to parse the final line
	- $lines = explode("\n", $stdout);
	+ $lines = @explode("\n", $stdout);
	$stdout = $lines[count($lines) - 2];
	return rtrim($stdout);
	}
	@@ -650,28 +650,28 @@
	list($stdout) = $status->resolvex();

	$result = new PhutilArrayWithDefaultValue();
	- $parts = explode("\0", $stdout);
	+ $parts = @explode("\0", $stdout);
	while (count($parts) > 1) {
	$entry = array_shift($parts);
	- $entry_parts = explode(' ', $entry, 2);
	+ $entry_parts = @explode(' ', $entry, 2);
	if ($entry_parts[0] == '1') {
	- $entry_parts = explode(' ', $entry, 9);
	+ $entry_parts = @explode(' ', $entry, 9);
	$path = $entry_parts[8];
	} else if ($entry_parts[0] == '2') {
	- $entry_parts = explode(' ', $entry, 10);
	+ $entry_parts = @explode(' ', $entry, 10);
	$path = $entry_parts[9];
	} else if ($entry_parts[0] == 'u') {
	- $entry_parts = explode(' ', $entry, 11);
	+ $entry_parts = @explode(' ', $entry, 11);
	$path = $entry_parts[10];
	} else if ($entry_parts[0] == '?') {
	- $entry_parts = explode(' ', $entry, 2);
	+ $entry_parts = @explode(' ', $entry, 2);
	$result[$entry_parts[1]] = self::FLAG_UNTRACKED;
	continue;
	}

	$result[$path] \|= self::FLAG_UNCOMMITTED;
	- $index_state = substr($entry_parts[1], 0, 1);
	- $working_state = substr($entry_parts[1], 1, 1);
	+ $index_state = @substr($entry_parts[1], 0, 1);
	+ $working_state = @substr($entry_parts[1], 1, 1);
	if ($index_state == 'A') {
	$result[$path] \|= self::FLAG_ADDED;
	} else if ($index_state == 'M') {
	@@ -691,8 +691,8 @@
	}
	}
	}
	- $submodule_tracked = substr($entry_parts[2], 2, 1);
	- $submodule_untracked = substr($entry_parts[2], 3, 1);
	+ $submodule_tracked = @substr($entry_parts[2], 2, 1);
	+ $submodule_untracked = @substr($entry_parts[2], 3, 1);
	if ($submodule_tracked == 'M' \|\| $submodule_untracked == 'U') {
	$result[$path] \|= self::FLAG_EXTERNALS;
	}
	@@ -761,8 +761,8 @@

	list($stdout) = $untracked_future->resolvex();
	$stdout = rtrim($stdout, "\n");
	- if (strlen($stdout)) {
	- $stdout = explode("\n", $stdout);
	+ if (@strlen($stdout)) {
	+ $stdout = @explode("\n", $stdout);
	foreach ($stdout as $path) {
	$result[$path] \|= self::FLAG_UNTRACKED;
	}
	@@ -770,8 +770,8 @@

	list($stdout, $stderr) = $unstaged_future->resolvex();
	$stdout = rtrim($stdout, "\n");
	- if (strlen($stdout)) {
	- $stdout = explode("\n", $stdout);
	+ if (@strlen($stdout)) {
	+ $stdout = @explode("\n", $stdout);
	foreach ($stdout as $path) {
	$result[$path] \|= self::FLAG_UNSTAGED;
	}
	@@ -850,7 +850,7 @@

	$status = trim($status);
	$lines = array();
	- foreach (explode("\n", $status) as $line) {
	+ foreach (@explode("\n", $status) as $line) {
	if ($line) {
	$lines[] = preg_split("/[ \t]/", $line, 6);
	}
	@@ -899,7 +899,7 @@
	} else if (isset($flags[$flag])) {
	$mask \|= $flags[$flag];
	} else if ($flag[0] == 'R') {
	- $both = explode("\t", $file);
	+ $both = @explode("\t", $file);
	if ($full) {
	$files[$both[0]] = array(
	'mask' => $mask \| self::FLAG_DELETED,
	@@ -911,7 +911,7 @@
	$file = $both[1];
	$mask \|= self::FLAG_ADDED;
	} else if ($flag[0] == 'C') {
	- $both = explode("\t", $file);
	+ $both = @explode("\t", $file);
	$file = $both[1];
	$mask \|= self::FLAG_ADDED;
	}
	@@ -957,12 +957,12 @@

	$blame = array();
	foreach ($blame_info as $line_info) {
	- $revision = substr($line_info, 0, 40);
	+ $revision = @substr($line_info, 0, 40);
	$data = idx($revision_data, $revision, array());

	if (empty($data)) {
	$matches = array();
	- if (!preg_match('/^author (.*)$/m', $line_info, $matches)) {
	+ if (!@preg_match('/^author (.*)$/m', $line_info, $matches)) {
	throw new Exception(
	pht(
	'Unexpected output from %s: no author for commit %s',
	@@ -970,7 +970,7 @@
	$revision));
	}
	$data['author'] = $matches[1];
	- $data['from_first_commit'] = preg_match('/^boundary$/m', $line_info);
	+ $data['from_first_commit'] = @preg_match('/^boundary$/m', $line_info);
	$revision_data[$revision] = $data;
	}

	@@ -996,14 +996,14 @@
	$result = array();

	$stdout = trim($stdout);
	- if (!strlen($stdout)) {
	+ if (!@strlen($stdout)) {
	return $result;
	}

	- $lines = explode("\n", $stdout);
	+ $lines = @explode("\n", $stdout);
	foreach ($lines as $line) {
	$matches = array();
	- $ok = preg_match(
	+ $ok = @preg_match(
	'/^(\d{6}) (blob\|tree\|commit) ([a-z0-9]{40})[\t](.*)$/',
	$line,
	$matches);
	@@ -1025,7 +1025,7 @@
	// and treat it as though it as a file containing a list of other files,
	// which is silly.

	- if (!strlen($path)) {
	+ if (!@strlen($path)) {
	// No filename, so there's no content (Probably new/deleted file).
	return null;
	}
	@@ -1076,14 +1076,14 @@
	$current = $this->getBranchName();
	$result = array();

	- $lines = explode("\2", $stdout);
	+ $lines = @explode("\2", $stdout);
	foreach ($lines as $line) {
	$line = trim($line);
	- if (!strlen($line)) {
	+ if (!@strlen($line)) {
	continue;
	}

	- $fields = explode("\1", $line, 6);
	+ $fields = @explode("\1", $line, 6);
	list($ref, $hash, $epoch, $tree, $desc, $text) = $fields;

	$branch = $this->getBranchNameFromRef($ref);
	@@ -1154,7 +1154,7 @@

	public function getAllLocalChanges() {
	$diff = $this->getFullGitDiff($this->getBaseCommit());
	- if (!strlen(trim($diff))) {
	+ if (!@strlen(trim($diff))) {
	return array();
	}
	$parser = new ArcanistDiffParser();
	@@ -1182,7 +1182,7 @@
	array $query) {

	$messages = $this->getGitCommitLog();
	- if (!strlen($messages)) {
	+ if (!@strlen($messages)) {
	return array();
	}

	@@ -1209,7 +1209,7 @@
	));

	foreach ($results as $key => $result) {
	- $hash = substr($reason_map[$result['id']], 0, 16);
	+ $hash = @substr($reason_map[$result['id']], 0, 16);
	$results[$key]['why'] = pht(
	"Commit message for '%s' has explicit 'Differential Revision'.",
	$hash);
	@@ -1263,12 +1263,12 @@
	}

	public function resolveBaseCommitRule($rule, $source) {
	- list($type, $name) = explode(':', $rule, 2);
	+ list($type, $name) = @explode(':', $rule, 2);

	switch ($type) {
	case 'git':
	$matches = null;
	- if (preg_match('/^merge-base$(.+)$$/', $name, $matches)) {
	+ if (@preg_match('/^merge-base$(.+)$$/', $name, $matches)) {
	list($err, $merge_base) = $this->execManualLocal(
	'merge-base -- %s HEAD',
	$matches[1]);
	@@ -1282,7 +1282,7 @@
	$source));
	return trim($merge_base);
	}
	- } else if (preg_match('/^branch-unique$(.+)$$/', $name, $matches)) {
	+ } else if (@preg_match('/^branch-unique$(.+)$$/', $name, $matches)) {
	list($err, $merge_base) = $this->execManualLocal(
	'merge-base -- %s HEAD',
	$matches[1]);
	@@ -1295,7 +1295,7 @@
	'log --format=%C %s..HEAD --',
	'%H',
	$merge_base);
	- $commits = array_filter(explode("\n", $commits));
	+ $commits = array_filter(@explode("\n", $commits));

	if (!$commits) {
	return null;
	@@ -1324,7 +1324,7 @@
	'branch %Ls --contains %s',
	$flags,
	$commit);
	- $branches = array_filter(explode("\n", $branches));
	+ $branches = array_filter(@explode("\n", $branches));

	// Filter the list, removing the "current" marker (*) and ignoring
	// anything other than known branch names (mainly, any possible
	@@ -1470,7 +1470,7 @@

	$upstream = trim($upstream);

	- if (preg_match('(^refs/heads/)', $upstream)) {
	+ if (@preg_match('(^refs/heads/)', $upstream)) {
	$upstream = preg_replace('(^refs/heads/)', '', $upstream);

	$is_cycle = $path->getUpstream($upstream);
	@@ -1493,9 +1493,9 @@
	continue;
	}

	- if (preg_match('(^refs/remotes/)', $upstream)) {
	+ if (@preg_match('(^refs/remotes/)', $upstream)) {
	$upstream = preg_replace('(^refs/remotes/)', '', $upstream);
	- list($remote, $branch) = explode('/', $upstream, 2);
	+ list($remote, $branch) = @explode('/', $upstream, 2);

	$path->addUpstream(
	$cursor,
	@@ -1562,7 +1562,7 @@

	if ($remote_uri !== null) {
	$remote_uri = rtrim($remote_uri);
	- if (!strlen($remote_uri)) {
	+ if (!@strlen($remote_uri)) {
	$remote_uri = null;
	}
	}
	diff --git a/src/repository/api/ArcanistMercurialAPI.php b/src/repository/api/ArcanistMercurialAPI.php
	--- a/src/repository/api/ArcanistMercurialAPI.php
	+++ b/src/repository/api/ArcanistMercurialAPI.php
	@@ -190,7 +190,7 @@
	"{date\|rfc822date}\1{branch}\1{tag}\1{parents}\1{desc}\2",
	hgsprintf('(%s::. - %s)', $base_commit, $base_commit),
	$this->getBranchName());
	- $logs = array_filter(explode("\2", $info));
	+ $logs = array_filter(@explode("\2", $info));

	$last_node = null;

	@@ -199,7 +199,7 @@
	$commits = array();
	foreach ($logs as $log) {
	list($node, $rev, $full_author, $date, $branch, $tag,
	- $parents, $desc) = explode("\1", $log, 9);
	+ $parents, $desc) = @explode("\1", $log, 9);

	list($author, $author_email) = $this->parseFullAuthor($full_author);

	@@ -232,7 +232,7 @@
	'rev' => $node, // TODO: Remove eventually.
	'local' => $rev,
	'parents' => $commit_parents,
	- 'summary' => head(explode("\n", $desc)),
	+ 'summary' => head(@explode("\n", $desc)),
	'message' => $desc,
	'authorEmail' => $author_email,
	);
	@@ -244,7 +244,7 @@
	->limit(4);
	foreach ($futures as $node => $future) {
	list($parents) = $future->resolvex();
	- $parents = array_filter(explode("\n", $parents));
	+ $parents = array_filter(@explode("\n", $parents));
	$commits[$node]['parents'] = $parents;
	}

	@@ -282,12 +282,12 @@

	$blame = array();
	foreach ($lines as $line) {
	- if (!strlen($line)) {
	+ if (!@strlen($line)) {
	continue;
	}

	$matches = null;
	- $ok = preg_match('/^\s*([^:]+?) ([a-f0-9]{12}):/', $line, $matches);
	+ $ok = @preg_match('/^\s*([^:]+?) ([a-f0-9]{12}):/', $line, $matches);

	if (!$ok) {
	throw new Exception(
	@@ -461,7 +461,7 @@
	if ($err) {
	return false;
	} else {
	- return (strpos($stdout, 'amend') !== false);
	+ return (@strpos($stdout, 'amend') !== false);
	}
	}

	@@ -505,7 +505,7 @@

	public function getAllLocalChanges() {
	$diff = $this->getFullMercurialDiff();
	- if (!strlen(trim($diff))) {
	+ if (!@strlen(trim($diff))) {
	return array();
	}
	$parser = new ArcanistDiffParser();
	@@ -529,9 +529,9 @@

	$map = array();

	- $logs = explode("\2", trim($stdout));
	+ $logs = @explode("\2", trim($stdout));
	foreach (array_filter($logs) as $log) {
	- list($node, $desc) = explode("\1", $log);
	+ list($node, $desc) = @explode("\1", $log);
	$map[$node] = $desc;
	}

	@@ -565,7 +565,7 @@
	));

	foreach ($results as $key => $result) {
	- $hash = substr($reason_map[$result['id']], 0, 16);
	+ $hash = @substr($reason_map[$result['id']], 0, 16);
	$results[$key]['why'] =
	pht(
	"Commit message for '%s' has explicit 'Differential Revision'.",
	@@ -633,7 +633,7 @@
	* @return array
	*/
	protected function parseFullAuthor($full_author) {
	- if (strpos($full_author, '@') === false) {
	+ if (@strpos($full_author, '@') === false) {
	$author = $full_author;
	$author_email = null;
	} else {
	@@ -672,7 +672,7 @@
	'commit --amend -l %s',
	$tmp_file);
	} catch (CommandException $ex) {
	- if (preg_match('/nothing changed/', $ex->getStdout())) {
	+ if (@preg_match('/nothing changed/', $ex->getStdout())) {
	// NOTE: Mercurial considers it an error to make a no-op amend. Although
	// we generally defer to the underlying VCS to dictate behavior, this
	// one seems a little goofy, and we use amend as part of various
	@@ -695,13 +695,13 @@
	'log --template {desc} --limit 1 --rev %s',
	$commit);

	- $summary = head(explode("\n", $summary));
	+ $summary = head(@explode("\n", $summary));

	return trim($summary);
	}

	public function resolveBaseCommitRule($rule, $source) {
	- list($type, $name) = explode(':', $rule, 2);
	+ list($type, $name) = @explode(':', $rule, 2);

	// NOTE: This function MUST return node hashes or symbolic commits (like
	// branch names or the word "tip"), not revsets. This includes ".^" and
	@@ -711,7 +711,7 @@
	switch ($type) {
	case 'hg':
	$matches = null;
	- if (preg_match('/^gca$(.+)$$/', $name, $matches)) {
	+ if (@preg_match('/^gca$(.+)$$/', $name, $matches)) {
	list($err, $merge_base) = $this->execManualLocal(
	'log --template={node} --rev %s',
	sprintf('ancestor(., %s)', $matches[1]));
	@@ -817,19 +817,19 @@
	$source));
	return $this->getCanonicalRevisionName('.^');
	default:
	- if (preg_match('/^nodiff$(.+)$$/', $name, $matches)) {
	+ if (@preg_match('/^nodiff$(.+)$$/', $name, $matches)) {
	list($results) = $this->execxLocal(
	'log --template %s --rev %s',
	"{node}\1{desc}\2",
	sprintf('ancestor(.,%s)::.^', $matches[1]));
	- $results = array_reverse(explode("\2", trim($results)));
	+ $results = array_reverse(@explode("\2", trim($results)));

	foreach ($results as $result) {
	if (empty($result)) {
	continue;
	}

	- list($node, $desc) = explode("\1", $result, 2);
	+ list($node, $desc) = @explode("\1", $result, 2);

	$message = ArcanistDifferentialCommitMessage::newFromRawCorpus(
	$desc);
	@@ -864,8 +864,8 @@
	$revision = null;
	list($err, $raw_info) = $this->execManualLocal('svn info');
	if (!$err) {
	- foreach (explode("\n", trim($raw_info)) as $line) {
	- list($key, $value) = explode(': ', $line, 2);
	+ foreach (@explode("\n", trim($raw_info)) as $line) {
	+ list($key, $value) = @explode(': ', $line, 2);
	switch ($key) {
	case 'URL':
	$info['base_path'] = $value;
	@@ -910,7 +910,7 @@
	list($stdout) = $this->execxLocal('paths default');

	$stdout = trim($stdout);
	- if (strlen($stdout)) {
	+ if (@strlen($stdout)) {
	return $stdout;
	}

	@@ -1049,7 +1049,7 @@

	$hashes = array();
	foreach ($lines as $line) {
	- if (!strlen(trim($line))) {
	+ if (!@strlen(trim($line))) {
	continue;
	}
	$hashes[] = $line;
	diff --git a/src/repository/api/ArcanistRepositoryAPI.php b/src/repository/api/ArcanistRepositoryAPI.php
	--- a/src/repository/api/ArcanistRepositoryAPI.php
	+++ b/src/repository/api/ArcanistRepositoryAPI.php
	@@ -804,7 +804,7 @@
	}

	final public function getDisplayHash($hash) {
	- return substr($hash, 0, 12);
	+ return @substr($hash, 0, 12);
	}


	diff --git a/src/repository/api/ArcanistSubversionAPI.php b/src/repository/api/ArcanistSubversionAPI.php
	--- a/src/repository/api/ArcanistSubversionAPI.php
	+++ b/src/repository/api/ArcanistSubversionAPI.php
	@@ -127,7 +127,7 @@

	foreach ($files as $path => $mask) {
	foreach ($externals as $external) {
	- if (!strncmp($path.'/', $external.'/', strlen($external) + 1)) {
	+ if (!strncmp($path.'/', $external.'/', @strlen($external) + 1)) {
	$files[$path] \|= self::FLAG_EXTERNALS;
	}
	}
	@@ -240,10 +240,10 @@
	public function getBranchName() {
	$info = $this->getSVNInfo('/');
	$repo_root = idx($info, 'Repository Root');
	- $repo_root_length = strlen($repo_root);
	+ $repo_root_length = @strlen($repo_root);
	$url = idx($info, 'URL');
	- if (substr($url, 0, $repo_root_length) == $repo_root) {
	- return substr($url, $repo_root_length);
	+ if (@substr($url, 0, $repo_root_length) == $repo_root) {
	+ return @substr($url, $repo_root_length);
	}
	return 'svn';
	}
	@@ -355,7 +355,7 @@
	$result = array();
	foreach ($patterns as $pattern) {
	$matches = null;
	- if (preg_match($pattern, $stdout, $matches)) {
	+ if (@preg_match($pattern, $stdout, $matches)) {
	$result[$matches[1]] = $matches[2];
	}
	}
	@@ -400,7 +400,7 @@
	// files. We just fix this inline since it's pretty unambiguous.
	// TODO: Move this to configuration?
	$matches = null;
	- if (preg_match('/\.(gif\|png\|jpe?g\|swf\|pdf\|ico)$/i', $path, $matches)) {
	+ if (@preg_match('/\.(gif\|png\|jpe?g\|swf\|pdf\|ico)$/i', $path, $matches)) {
	// Check if the file is deleted first; SVN will complain if we try to
	// get properties of a deleted file.
	if ($status & parent::FLAG_DELETED) {
	@@ -505,7 +505,7 @@
	}

	$data = Filesystem::readFile($full_path);
	- $lines = explode("\n", $data);
	+ $lines = @explode("\n", $data);
	$len = count($lines);
	foreach ($lines as $key => $line) {
	$lines[$key] = ' '.$line;
	@@ -533,7 +533,7 @@
	public function getChangedFiles($since_commit) {
	$url = '';
	$match = null;
	- if (preg_match('/(.)@(.)/', $since_commit, $match)) {
	+ if (@preg_match('/(.)@(.)/', $since_commit, $match)) {
	list(, $url, $since_commit) = $match;
	}
	// TODO: Handle paths with newlines.
	@@ -552,7 +552,7 @@

	public function filterFiles($path) {
	// NOTE: SVN uses '/' also on Windows.
	- if ($path == '' \|\| substr($path, -1) == '/') {
	+ if ($path == '' \|\| @substr($path, -1) == '/') {
	return null;
	}
	return $path;
	@@ -564,14 +564,14 @@
	list($stdout) = $this->execxLocal('blame %s', $path);

	$stdout = trim($stdout);
	- if (!strlen($stdout)) {
	+ if (!@strlen($stdout)) {
	// Empty file.
	return $blame;
	}

	- foreach (explode("\n", $stdout) as $line) {
	+ foreach (@explode("\n", $stdout) as $line) {
	$m = array();
	- if (!preg_match('/^\s*(\d+)\s+(\S+)/', $line, $m)) {
	+ if (!@preg_match('/^\s*(\d+)\s+(\S+)/', $line, $m)) {
	throw new Exception(pht("Bad blame? `%s'", $line));
	}
	$revision = $m[1];
	@@ -678,7 +678,7 @@
	// where ".@" means "fail with an error" instead of ". at the working copy
	// revision", so avoid escaping "." into ".@".

	- if (strpos($file, '@') !== false) {
	+ if (@strpos($file, '@') !== false) {
	$file = $file.'@';
	}

	diff --git a/src/repository/graph/query/ArcanistGitCommitGraphQuery.php b/src/repository/graph/query/ArcanistGitCommitGraphQuery.php
	--- a/src/repository/graph/query/ArcanistGitCommitGraphQuery.php
	+++ b/src/repository/graph/query/ArcanistGitCommitGraphQuery.php
	@@ -151,7 +151,7 @@
	continue;
	}

	- $fields = explode("\2", $line);
	+ $fields = @explode("\2", $line);

	if (count($fields) !== 5) {
	throw new Exception(
	@@ -175,8 +175,8 @@
	->setCommitMessage($message)
	->setCommitEpoch((int)$commit_epoch);

	- if (strlen($parents)) {
	- $parents = explode(' ', $parents);
	+ if (@strlen($parents)) {
	+ $parents = @explode(' ', $parents);

	$parent_nodes = array();
	foreach ($parents as $parent) {
	diff --git a/src/repository/graph/query/ArcanistMercurialCommitGraphQuery.php b/src/repository/graph/query/ArcanistMercurialCommitGraphQuery.php
	--- a/src/repository/graph/query/ArcanistMercurialCommitGraphQuery.php
	+++ b/src/repository/graph/query/ArcanistMercurialCommitGraphQuery.php
	@@ -138,7 +138,7 @@
	continue;
	}

	- $fields = explode("\2", $line);
	+ $fields = @explode("\2", $line);

	if (count($fields) !== 5) {
	throw new Exception(
	@@ -160,8 +160,8 @@
	->setCommitMessage($message)
	->setCommitEpoch((int)strtotime($commit_epoch));

	- if (strlen($parents)) {
	- $parents = explode(' ', $parents);
	+ if (@strlen($parents)) {
	+ $parents = @explode(' ', $parents);
	$parent_nodes = array();
	foreach ($parents as $parent) {
	if ($parent === $no_parent) {
	diff --git a/src/repository/graph/query/ArcanistSimpleCommitGraphQuery.php b/src/repository/graph/query/ArcanistSimpleCommitGraphQuery.php
	--- a/src/repository/graph/query/ArcanistSimpleCommitGraphQuery.php
	+++ b/src/repository/graph/query/ArcanistSimpleCommitGraphQuery.php
	@@ -21,7 +21,7 @@
	$edges = preg_split('(\s+)', trim($corpus));
	foreach ($edges as $edge) {
	$matches = null;
	- $ok = preg_match('(^(?P<parent>\S+)>(?P<child>\S+)\z)', $edge, $matches);
	+ $ok = @preg_match('(^(?P<parent>\S+)>(?P<child>\S+)\z)', $edge, $matches);
	if (!$ok) {
	throw new Exception(
	pht(
	diff --git a/src/repository/graph/view/ArcanistCommitGraphSetView.php b/src/repository/graph/view/ArcanistCommitGraphSetView.php
	--- a/src/repository/graph/view/ArcanistCommitGraphSetView.php
	+++ b/src/repository/graph/view/ArcanistCommitGraphSetView.php
	@@ -126,7 +126,7 @@
	$merge_strings = array();
	foreach ($revision_refs as $revision_ref) {
	$summary = $revision_ref->getName();
	- $merge_key = substr($summary, 0, 32);
	+ $merge_key = @substr($summary, 0, 32);
	$merge_key = phutil_utf8_strtolower($merge_key);

	$merge_strings[$merge_key][] = $revision_ref;
	@@ -140,7 +140,7 @@
	if (count($revision_refs) === 1) {
	$merge_with = head($revision_refs);
	} else {
	- $merge_key = substr($summary, 0, 32);
	+ $merge_key = @substr($summary, 0, 32);
	$merge_key = phutil_utf8_strtolower($merge_key);
	if (isset($merge_strings[$merge_key])) {
	$merge_refs = $merge_strings[$merge_key];
	@@ -263,7 +263,7 @@
	$commit_hash = $commit_ref->getCommitHash();
	$commit_hash = tsprintf(
	'%s',
	- substr($commit_hash, 0, 7));
	+ @substr($commit_hash, 0, 7));

	$commit_label = $commit_hash;
	} else {
	@@ -271,8 +271,8 @@
	$max = last($commit_refs);
	$commit_label = tsprintf(
	'%s..%s',
	- substr($min->getCommitHash(), 0, 7),
	- substr($max->getCommitHash(), 0, 7));
	+ @substr($min->getCommitHash(), 0, 7),
	+ @substr($max->getCommitHash(), 0, 7));
	}

	$member_views = $this->getMemberViews();
	@@ -426,7 +426,7 @@
	$api = $this->getRepositoryAPI();

	$hash = $commit_ref->getCommitHash();
	- $hash = substr($hash, 0, 7);
	+ $hash = @substr($hash, 0, 7);

	return tsprintf('%s', $hash);
	}
	diff --git a/src/repository/marker/ArcanistGitRepositoryMarkerQuery.php b/src/repository/marker/ArcanistGitRepositoryMarkerQuery.php
	--- a/src/repository/marker/ArcanistGitRepositoryMarkerQuery.php
	+++ b/src/repository/marker/ArcanistGitRepositoryMarkerQuery.php
	@@ -21,10 +21,10 @@
	$expect_count = count($field_list);

	$branch_prefix = 'refs/heads/';
	- $branch_length = strlen($branch_prefix);
	+ $branch_length = @strlen($branch_prefix);

	$remote_prefix = 'refs/remotes/';
	- $remote_length = strlen($remote_prefix);
	+ $remote_length = @strlen($remote_prefix);

	list($stdout) = $api->newFuture(
	'for-each-ref --format %s -- refs/',
	@@ -32,14 +32,14 @@

	$markers = array();

	- $lines = explode("\2", $stdout);
	+ $lines = @explode("\2", $stdout);
	foreach ($lines as $line) {
	$line = trim($line);
	- if (!strlen($line)) {
	+ if (!@strlen($line)) {
	continue;
	}

	- $fields = explode("\1", $line, $expect_count);
	+ $fields = @explode("\1", $line, $expect_count);
	$actual_count = count($fields);
	if ($actual_count !== $expect_count) {
	throw new Exception(
	@@ -57,13 +57,13 @@

	if (!strncmp($ref, $branch_prefix, $branch_length)) {
	$type = ArcanistMarkerRef::TYPE_BRANCH;
	- $name = substr($ref, $branch_length);
	+ $name = @substr($ref, $branch_length);
	} else if (!strncmp($ref, $remote_prefix, $remote_length)) {
	// This isn't entirely correct: the ref may be a tag, etc.
	$type = ArcanistMarkerRef::TYPE_BRANCH;

	- $label = substr($ref, $remote_length);
	- $parts = explode('/', $label, 2);
	+ $label = @substr($ref, $remote_length);
	+ $parts = @explode('/', $label, 2);

	$remote_name = $parts[0];
	$name = $parts[1];
	@@ -85,7 +85,7 @@
	$marker->setRemoteName($remote_name);
	}

	- if (strlen($dst_hash)) {
	+ if (@strlen($dst_hash)) {
	$commit_hash = $dst_hash;
	} else {
	$commit_hash = $hash;
	@@ -129,7 +129,7 @@
	}

	$matches = null;
	- if (!preg_match('(^refs/heads/(.*)\z)', trim($stdout), $matches)) {
	+ if (!@preg_match('(^refs/heads/(.*)\z)', trim($stdout), $matches)) {
	return null;
	}

	@@ -148,7 +148,7 @@
	list($stdout) = $future->resolve();

	$branch_prefix = 'refs/heads/';
	- $branch_length = strlen($branch_prefix);
	+ $branch_length = @strlen($branch_prefix);

	$pattern = '(^(?P<hash>\S+)\t(?P<ref>\S+)\z)';
	$markers = array();
	@@ -156,7 +156,7 @@
	$lines = phutil_split_lines($stdout, false);
	foreach ($lines as $line) {
	$matches = null;
	- $ok = preg_match($pattern, $line, $matches);
	+ $ok = @preg_match($pattern, $line, $matches);
	if (!$ok) {
	throw new Exception(
	pht(
	@@ -169,7 +169,7 @@

	if (!strncmp($ref, $branch_prefix, $branch_length)) {
	$type = ArcanistMarkerRef::TYPE_BRANCH;
	- $name = substr($ref, $branch_length);
	+ $name = @substr($ref, $branch_length);
	} else {
	// For now, discard other refs.
	continue;
	diff --git a/src/repository/parser/ArcanistMercurialParser.php b/src/repository/parser/ArcanistMercurialParser.php
	--- a/src/repository/parser/ArcanistMercurialParser.php
	+++ b/src/repository/parser/ArcanistMercurialParser.php
	@@ -25,12 +25,12 @@
	$result = array();

	$stdout = trim($stdout);
	- if (!strlen($stdout)) {
	+ if (!@strlen($stdout)) {
	return $result;
	}

	$last_path = null;
	- $lines = explode("\n", $stdout);
	+ $lines = @explode("\n", $stdout);
	foreach ($lines as $line) {
	$flags = 0;
	if ($line[1] !== ' ') {
	@@ -40,7 +40,7 @@
	$line));
	}
	$code = $line[0];
	- $path = substr($line, 2);
	+ $path = @substr($line, 2);
	switch ($code) {
	case 'A':
	$flags \|= ArcanistRepositoryAPI::FLAG_ADDED;
	@@ -118,27 +118,27 @@
	$result = array();

	$stdout = trim($stdout);
	- if (!strlen($stdout)) {
	+ if (!@strlen($stdout)) {
	return $result;
	}

	- $chunks = explode("\n\n", $stdout);
	+ $chunks = @explode("\n\n", $stdout);
	foreach ($chunks as $chunk) {
	$commit = array();
	- $lines = explode("\n", $chunk);
	+ $lines = @explode("\n", $chunk);
	foreach ($lines as $line) {
	- if (preg_match('/^(comparing with\|searching for changes)/', $line)) {
	+ if (@preg_match('/^(comparing with\|searching for changes)/', $line)) {
	// These are sent to stdout when you run "hg outgoing" although the
	// format is otherwise identical to "hg log".
	continue;
	}

	- if (preg_match('/^remote:/', $line)) {
	+ if (@preg_match('/^remote:/', $line)) {
	// This indicates remote error in "hg outgoing".
	continue;
	}

	- list($name, $value) = explode(':', $line, 2);
	+ list($name, $value) = @explode(':', $line, 2);
	$value = trim($value);
	switch ($name) {
	case 'user':
	@@ -151,7 +151,7 @@
	$commit['summary'] = $value;
	break;
	case 'changeset':
	- list($local, $rev) = explode(':', $value, 2);
	+ list($local, $rev) = @explode(':', $value, 2);
	$commit['local'] = $local;
	$commit['rev'] = $rev;
	break;
	@@ -159,7 +159,7 @@
	if (empty($commit['parents'])) {
	$commit['parents'] = array();
	}
	- list($local, $rev) = explode(':', $value, 2);
	+ list($local, $rev) = @explode(':', $value, 2);
	$commit['parents'][] = array(
	'local' => $local,
	'rev' => $rev,
	@@ -200,12 +200,12 @@
	*/
	public static function parseMercurialBranches($stdout) {
	$stdout = rtrim($stdout, "\n");
	- if (!strlen($stdout)) {
	+ if (!@strlen($stdout)) {
	// No branches; commonly, this occurs in a newly initialized repository.
	return array();
	}

	- $lines = explode("\n", $stdout);
	+ $lines = @explode("\n", $stdout);

	$branches = array();
	foreach ($lines as $line) {
	@@ -222,7 +222,7 @@
	// See the unit tests for more examples.
	$regexp = '/^(\S+(?:\s+\S+)*)\s+(\d+):([a-f0-9]+)(\s+\$inactive\$)?$/';

	- if (!preg_match($regexp, $line, $matches)) {
	+ if (!@preg_match($regexp, $line, $matches)) {
	throw new Exception(
	pht(
	"Failed to parse '%s' output: %s",
	diff --git a/src/repository/raw/ArcanistGitRawCommit.php b/src/repository/raw/ArcanistGitRawCommit.php
	--- a/src/repository/raw/ArcanistGitRawCommit.php
	+++ b/src/repository/raw/ArcanistGitRawCommit.php
	@@ -33,7 +33,7 @@
	}

	$matches = null;
	- $ok = preg_match($pattern, $line, $matches);
	+ $ok = @preg_match($pattern, $line, $matches);
	if (!$ok) {
	throw new Exception(
	pht(
	diff --git a/src/repository/remote/ArcanistGitRepositoryRemoteQuery.php b/src/repository/remote/ArcanistGitRepositoryRemoteQuery.php
	--- a/src/repository/remote/ArcanistGitRepositoryRemoteQuery.php
	+++ b/src/repository/remote/ArcanistGitRepositoryRemoteQuery.php
	@@ -24,7 +24,7 @@
	$lines = phutil_split_lines($lines, false);
	foreach ($lines as $line) {
	$matches = null;
	- if (!preg_match($pattern, $line, $matches)) {
	+ if (!@preg_match($pattern, $line, $matches)) {
	throw new Exception(
	pht(
	'Failed to match remote pattern against line "%s".',
	diff --git a/src/repository/remote/ArcanistMercurialRepositoryRemoteQuery.php b/src/repository/remote/ArcanistMercurialRepositoryRemoteQuery.php
	--- a/src/repository/remote/ArcanistMercurialRepositoryRemoteQuery.php
	+++ b/src/repository/remote/ArcanistMercurialRepositoryRemoteQuery.php
	@@ -16,7 +16,7 @@
	$lines = phutil_split_lines($lines, false);
	foreach ($lines as $line) {
	$matches = null;
	- if (!preg_match($pattern, $line, $matches)) {
	+ if (!@preg_match($pattern, $line, $matches)) {
	throw new Exception(
	pht(
	'Failed to match remote pattern against line "%s".',
	diff --git a/src/repository/remote/ArcanistRepositoryURINormalizer.php b/src/repository/remote/ArcanistRepositoryURINormalizer.php
	--- a/src/repository/remote/ArcanistRepositoryURINormalizer.php
	+++ b/src/repository/remote/ArcanistRepositoryURINormalizer.php
	@@ -127,7 +127,7 @@
	// example.

	$matches = null;
	- if (preg_match('@^(diffusion/(?:[A-Z]+\|\d+))@', $path, $matches)) {
	+ if (@preg_match('@^(diffusion/(?:[A-Z]+\|\d+))@', $path, $matches)) {
	$path = $matches[1];
	}

	@@ -140,7 +140,7 @@
	$uri = new PhutilURI($this->uri);
	$domain = $uri->getDomain();

	- if (!strlen($domain)) {
	+ if (!@strlen($domain)) {
	return '<void>';
	}

	diff --git a/src/repository/state/ArcanistGitLocalState.php b/src/repository/state/ArcanistGitLocalState.php
	--- a/src/repository/state/ArcanistGitLocalState.php
	+++ b/src/repository/state/ArcanistGitLocalState.php
	@@ -160,7 +160,7 @@
	}

	private function getDisplayStashRef($stash_ref) {
	- return substr($stash_ref, 0, 12);
	+ return @substr($stash_ref, 0, 12);
	}

	}
	diff --git a/src/runtime/ArcanistRuntime.php b/src/runtime/ArcanistRuntime.php
	--- a/src/runtime/ArcanistRuntime.php
	+++ b/src/runtime/ArcanistRuntime.php
	@@ -197,7 +197,7 @@
	// TODO: This is very, very hacky; we're trying to let errors like
	// "you passed the wrong arguments" through but fall back to classic
	// mode if the workflow itself doesn't exist.
	- if (!preg_match('/invalid command/i', $usage_exception->getMessage())) {
	+ if (!@preg_match('/invalid command/i', $usage_exception->getMessage())) {
	throw $usage_exception;
	}

	@@ -258,14 +258,14 @@
	phpinfo(INFO_GENERAL);
	$info = ob_get_clean();
	$matches = null;
	- if (preg_match('/^Configure Command =>\s(.?)$/m', $info, $matches)) {
	+ if (@preg_match('/^Configure Command =>\s(.?)$/m', $info, $matches)) {
	$config = $matches[1];
	}
	}

	list($what, $which) = $resolution;

	- if ($what == 'flag' && strpos($config, $which) !== false) {
	+ if ($what == 'flag' && @strpos($config, $which) !== false) {
	$show_config = true;
	$problems[] = sprintf(
	'The build of PHP you are running was compiled with the configure '.
	diff --git a/src/serviceprofiler/PhutilServiceProfiler.php b/src/serviceprofiler/PhutilServiceProfiler.php
	--- a/src/serviceprofiler/PhutilServiceProfiler.php
	+++ b/src/serviceprofiler/PhutilServiceProfiler.php
	@@ -108,12 +108,12 @@
	$desc = $data['database'];
	break;
	case 'query':
	- $desc = substr($data['query'], 0, 512);
	+ $desc = @substr($data['query'], 0, 512);
	break;
	case 'multi-query':
	$desc = array();
	foreach ($data['queries'] as $query) {
	- $desc[] = substr($query, 0, 256);
	+ $desc[] = @substr($query, 0, 256);
	}
	$desc = implode('; ', $desc);
	break;
	@@ -137,7 +137,7 @@

	$uri = phutil_censor_credentials($data['uri']);

	- if (strlen($proxy)) {
	+ if (@strlen($proxy)) {
	$desc = "{$proxy} >> {$uri}";
	} else {
	$desc = $uri;
	diff --git a/src/symbols/PhutilClassMapQuery.php b/src/symbols/PhutilClassMapQuery.php
	--- a/src/symbols/PhutilClassMapQuery.php
	+++ b/src/symbols/PhutilClassMapQuery.php
	@@ -209,7 +209,7 @@
	*/
	private function loadMap() {
	$ancestor = $this->ancestorClass;
	- if (!strlen($ancestor)) {
	+ if (!@strlen($ancestor)) {
	throw new PhutilInvalidStateException('setAncestorClass');
	}

	@@ -226,8 +226,8 @@
	$unique = $this->uniqueMethod;
	$sort = $this->sortMethod;

	- if (strlen($expand)) {
	- if (!strlen($unique)) {
	+ if (@strlen($expand)) {
	+ if (!@strlen($unique)) {
	throw new Exception(
	pht(
	'Trying to execute a class map query for descendants of class '.
	@@ -245,7 +245,7 @@
	->loadObjects();

	// Apply the "expand" mechanism, if it is configured.
	- if (strlen($expand)) {
	+ if (@strlen($expand)) {
	$list = array();
	foreach ($objects as $object) {
	foreach (call_user_func(array($object, $expand)) as $instance) {
	@@ -257,7 +257,7 @@
	}

	// Apply the "unique" mechanism, if it is configured.
	- if (strlen($unique)) {
	+ if (@strlen($unique)) {
	$map = array();
	foreach ($list as $object) {
	$key = call_user_func(array($object, $unique));
	@@ -287,12 +287,12 @@
	}

	// Apply the "filter" mechanism, if it is configured.
	- if (strlen($filter)) {
	+ if (@strlen($filter)) {
	$map = mfilter($map, $filter);
	}

	// Apply the "sort" mechanism, if it is configured.
	- if (strlen($sort)) {
	+ if (@strlen($sort)) {
	if ($map) {
	// The "sort" method may return scalars (which we want to sort with
	// "msort()"), or may return PhutilSortVector objects (which we want
	diff --git a/src/symbols/PhutilSymbolLoader.php b/src/symbols/PhutilSymbolLoader.php
	--- a/src/symbols/PhutilSymbolLoader.php
	+++ b/src/symbols/PhutilSymbolLoader.php
	@@ -235,7 +235,7 @@
	}

	if ($this->pathPrefix) {
	- $len = strlen($this->pathPrefix);
	+ $len = @strlen($this->pathPrefix);
	foreach ($filtered_map as $name => $where) {
	if (strncmp($where, $this->pathPrefix, $len) !== 0) {
	unset($filtered_map[$name]);
	diff --git a/src/toolset/ArcanistAlias.php b/src/toolset/ArcanistAlias.php
	--- a/src/toolset/ArcanistAlias.php
	+++ b/src/toolset/ArcanistAlias.php
	@@ -120,7 +120,7 @@
	}

	$head = head($command);
	- return preg_match('/^!/', $head);
	+ return @preg_match('/^!/', $head);
	}

	public function getStorageDictionary() {
	diff --git a/src/toolset/ArcanistAliasEngine.php b/src/toolset/ArcanistAliasEngine.php
	--- a/src/toolset/ArcanistAliasEngine.php
	+++ b/src/toolset/ArcanistAliasEngine.php
	@@ -203,7 +203,7 @@
	$alias_command = array_shift($alias_argv);

	if ($alias->isShellCommandAlias()) {
	- $shell_command = substr($alias_command, 1);
	+ $shell_command = @substr($alias_command, 1);

	$shell_argv = array_merge(
	array($shell_command),
	diff --git a/src/toolset/ArcanistPrompt.php b/src/toolset/ArcanistPrompt.php
	--- a/src/toolset/ArcanistPrompt.php
	+++ b/src/toolset/ArcanistPrompt.php
	@@ -63,7 +63,7 @@
	}

	$query = $this->getQuery();
	- if (!strlen($query)) {
	+ if (!@strlen($query)) {
	throw new Exception(
	pht(
	'Prompt ("%s") has no query text!',
	@@ -143,14 +143,14 @@
	pht('fread() from stdin failed with an error.'));
	}

	- if (!strlen($bytes)) {
	+ if (!@strlen($bytes)) {
	break;
	}

	$response .= $bytes;
	}

	- if (!strlen($response)) {
	+ if (!@strlen($response)) {
	continue;
	}

	@@ -159,7 +159,7 @@
	}

	$response = trim($response);
	- if (!strlen($response)) {
	+ if (!@strlen($response)) {
	$response = $default;
	}
	}
	@@ -167,7 +167,7 @@
	$save_scope = null;
	if (!$is_saved) {
	$matches = null;
	- if (preg_match('(^(.)([!])\z)', $response, $matches)) {
	+ if (@preg_match('(^(.)([!])\z)', $response, $matches)) {
	$response = $matches[1];

	if ($matches[2] === '*') {
	diff --git a/src/toolset/workflow/ArcanistShellCompleteWorkflow.php b/src/toolset/workflow/ArcanistShellCompleteWorkflow.php
	--- a/src/toolset/workflow/ArcanistShellCompleteWorkflow.php
	+++ b/src/toolset/workflow/ArcanistShellCompleteWorkflow.php
	@@ -92,7 +92,7 @@
	$argv = $this->getArgument('argv');

	$is_generate = $this->getArgument('generate');
	- $is_shell = (bool)strlen($this->getArgument('shell'));
	+ $is_shell = (bool)@strlen($this->getArgument('shell'));
	$is_current = $this->getArgument('current');

	if ($argv) {
	@@ -194,7 +194,7 @@
	$file = $spec['file'];
	$home = getenv('HOME');

	- if (!strlen($home)) {
	+ if (!@strlen($home)) {
	throw new PhutilArgumentUsageException(
	pht(
	'The "HOME" environment variable is not defined, so this workflow '.
	@@ -218,7 +218,7 @@
	$this->getShellPath($spec['source']));

	$matches = null;
	- $replace = preg_match(
	+ $replace = @preg_match(
	'/(\s\n)?[^\n]+# arcanist-shell-complete\s(\n\s*)?/',
	$data,
	$matches,
	@@ -234,7 +234,7 @@
	if ($replace) {
	$replace_pos = $matches[0][1];
	$replace_line = $matches[0][0];
	- $replace_len = strlen($replace_line);
	+ $replace_len = @strlen($replace_line);
	$replace_display = trim($replace_line);

	if ($replace_pos === 0) {
	@@ -343,7 +343,7 @@
	pht('Detecting current shell...'));

	$shell_env = getenv('SHELL');
	- if (!strlen($shell_env)) {
	+ if (!@strlen($shell_env)) {
	$log->writeWarning(
	pht('SHELL'),
	pht(
	@@ -551,7 +551,7 @@
	$argument = null;
	$prev = idx($argv, $pos - 1, null);
	if (!strncmp($prev, '--', 2)) {
	- $prev = substr($prev, 2);
	+ $prev = @substr($prev, 2);
	$argument = idx($arguments, $prev);
	}

	@@ -559,7 +559,7 @@
	// a parameterized argument. If it is, the next argument should be a
	// parameter.

	- if ($argument && strlen($argument->getParameter())) {
	+ if ($argument && @strlen($argument->getParameter())) {
	if ($argument->getIsPathArgument()) {
	return $this->suggestPaths($current);
	} else {
	@@ -590,7 +590,7 @@
	// READ<tab>" should autocomplete a file, and "arc lint <tab>" should
	// suggest files in the current directory.

	- if (!strlen($current) \|\| !$matches) {
	+ if (!@strlen($current) \|\| !$matches) {
	$try_paths = true;
	} else {
	$try_paths = false;
	@@ -641,9 +641,9 @@
	private function getMatches(array $candidates, $prefix) {
	$matches = array();

	- if (strlen($prefix)) {
	+ if (@strlen($prefix)) {
	foreach ($candidates as $possible) {
	- if (!strncmp($possible, $prefix, strlen($prefix))) {
	+ if (!strncmp($possible, $prefix, @strlen($prefix))) {
	$matches[] = $possible;
	}
	}
	@@ -651,7 +651,7 @@
	// If we matched nothing, try a case-insensitive match.
	if (!$matches) {
	foreach ($candidates as $possible) {
	- if (!strncasecmp($possible, $prefix, strlen($prefix))) {
	+ if (!strncasecmp($possible, $prefix, @strlen($prefix))) {
	$matches[] = $possible;
	}
	}
	diff --git a/src/toolset/workflow/ArcanistVersionWorkflow.php b/src/toolset/workflow/ArcanistVersionWorkflow.php
	--- a/src/toolset/workflow/ArcanistVersionWorkflow.php
	+++ b/src/toolset/workflow/ArcanistVersionWorkflow.php
	@@ -67,7 +67,7 @@
	'%ct%x01%H');
	$commit = trim($commit);

	- list($timestamp, $commit) = explode("\1", $commit);
	+ list($timestamp, $commit) = @explode("\1", $commit);

	$console->writeOut(
	"%s %s (%s)\n",
	diff --git a/src/unit/ArcanistUnitTestResult.php b/src/unit/ArcanistUnitTestResult.php
	--- a/src/unit/ArcanistUnitTestResult.php
	+++ b/src/unit/ArcanistUnitTestResult.php
	@@ -31,7 +31,7 @@

	public function setName($name) {
	$maximum_bytes = 255;
	- $actual_bytes = strlen($name);
	+ $actual_bytes = @strlen($name);

	if ($actual_bytes > $maximum_bytes) {
	throw new Exception(
	@@ -142,8 +142,8 @@

	$base = reset($coverage);
	foreach ($coverage as $more_coverage) {
	- $base_len = strlen($base);
	- $more_len = strlen($more_coverage);
	+ $base_len = @strlen($base);
	+ $more_len = @strlen($more_coverage);

	$len = min($base_len, $more_len);
	for ($ii = 0; $ii < $len; $ii++) {
	@@ -154,7 +154,7 @@

	// If a secondary report has more data, copy all of it over.
	if ($more_len > $base_len) {
	- $base .= substr($more_coverage, $base_len);
	+ $base .= @substr($more_coverage, $base_len);
	}
	}

	diff --git a/src/unit/engine/ArcanistConfigurationDrivenUnitTestEngine.php b/src/unit/engine/ArcanistConfigurationDrivenUnitTestEngine.php
	--- a/src/unit/engine/ArcanistConfigurationDrivenUnitTestEngine.php
	+++ b/src/unit/engine/ArcanistConfigurationDrivenUnitTestEngine.php
	@@ -192,7 +192,7 @@
	$keep = true;
	} else {
	foreach ($include as $rule) {
	- if (preg_match($rule, $path)) {
	+ if (@preg_match($rule, $path)) {
	$keep = true;
	break;
	}
	@@ -205,7 +205,7 @@

	if ($exclude) {
	foreach ($exclude as $rule) {
	- if (preg_match($rule, $path)) {
	+ if (@preg_match($rule, $path)) {
	continue 2;
	}
	}
	diff --git a/src/unit/engine/CSharpToolsTestEngine.php b/src/unit/engine/CSharpToolsTestEngine.php
	--- a/src/unit/engine/CSharpToolsTestEngine.php
	+++ b/src/unit/engine/CSharpToolsTestEngine.php
	@@ -68,7 +68,7 @@
	}
	}
	if ($this->matchRegex !== null) {
	- if (preg_match($this->matchRegex, $file) === 1) {
	+ if (@preg_match($this->matchRegex, $file) === 1) {
	return true;
	} else {
	return false;
	@@ -117,7 +117,7 @@
	$assembly_dir = dirname($test_assembly);
	$assemblies_to_instrument = array();
	foreach (Filesystem::listDirectory($assembly_dir) as $file) {
	- if (substr($file, -4) == '.dll' \|\| substr($file, -4) == '.exe') {
	+ if (@substr($file, -4) == '.dll' \|\| @substr($file, -4) == '.exe') {
	if ($this->assemblyShouldBeInstrumented($file)) {
	$assemblies_to_instrument[] = $assembly_dir.DIRECTORY_SEPARATOR.$file;
	}
	@@ -235,7 +235,7 @@

	foreach ($instrumented as $instrument) {
	$absolute_file = $instrument['file'];
	- $relative_file = substr($absolute_file, strlen($this->projectRoot) + 1);
	+ $relative_file = @substr($absolute_file, @strlen($this->projectRoot) + 1);
	if (!in_array($relative_file, $files)) {
	$files[] = $relative_file;
	}
	diff --git a/src/unit/engine/NoseTestEngine.php b/src/unit/engine/NoseTestEngine.php
	--- a/src/unit/engine/NoseTestEngine.php
	+++ b/src/unit/engine/NoseTestEngine.php
	@@ -127,7 +127,7 @@

	public function readCoverage($cover_file, $source_path) {
	$coverage_xml = Filesystem::readFile($cover_file);
	- if (strlen($coverage_xml) < 1) {
	+ if (@strlen($coverage_xml) < 1) {
	return array();
	}
	$coverage_dom = new DOMDocument();
	diff --git a/src/unit/engine/PhpunitTestEngine.php b/src/unit/engine/PhpunitTestEngine.php
	--- a/src/unit/engine/PhpunitTestEngine.php
	+++ b/src/unit/engine/PhpunitTestEngine.php
	@@ -25,11 +25,11 @@

	// Not sure if it would make sense to go further if
	// it is not a .php file
	- if (substr($path, -4) != '.php') {
	+ if (@substr($path, -4) != '.php') {
	continue;
	}

	- if (substr($path, -8) == 'Test.php') {
	+ if (@substr($path, -8) == 'Test.php') {
	// Looks like a valid test file name.
	$this->affectedTests[$path] = $path;
	continue;
	@@ -128,7 +128,7 @@
	$file = basename($path);
	$possible_files = array(
	$file,
	- substr($file, 0, -4).'Test.php',
	+ @substr($file, 0, -4).'Test.php',
	);

	$search = self::getSearchLocationsForTests($path);
	@@ -219,7 +219,7 @@

	// Try replacing each directory component with 'tests/'.
	$parts = trim($dir, DIRECTORY_SEPARATOR);
	- $parts = explode(DIRECTORY_SEPARATOR, $parts);
	+ $parts = @explode(DIRECTORY_SEPARATOR, $parts);
	foreach (array_reverse(array_keys($parts)) as $key) {
	foreach ($test_dir_names as $test_dir_name) {
	$try = $parts;
	diff --git a/src/unit/engine/PhutilUnitTestEngine.php b/src/unit/engine/PhutilUnitTestEngine.php
	--- a/src/unit/engine/PhutilUnitTestEngine.php
	+++ b/src/unit/engine/PhutilUnitTestEngine.php
	@@ -90,7 +90,7 @@

	$run_tests = array();
	foreach ($symbols as $symbol) {
	- if (!preg_match('@(?:^\|/)__tests__/@', $symbol['where'])) {
	+ if (!@preg_match('@(?:^\|/)__tests__/@', $symbol['where'])) {
	continue;
	}

	@@ -193,7 +193,7 @@
	continue;
	}

	- if (is_file($path) && preg_match('@(?:^\|/)__tests__/@', $path)) {
	+ if (is_file($path) && @preg_match('@(?:^\|/)__tests__/@', $path)) {
	$paths[$library_name.':'.$library_path] = array(
	'library' => $library_name,
	'path' => $library_path,
	diff --git a/src/unit/engine/PytestTestEngine.php b/src/unit/engine/PytestTestEngine.php
	--- a/src/unit/engine/PytestTestEngine.php
	+++ b/src/unit/engine/PytestTestEngine.php
	@@ -79,7 +79,7 @@
	foreach ($classes as $class) {
	// filename is actually python module path with ".py" at the end,
	// e.g.: tornado.web.py
	- $relative_path = explode('.', $class->getAttribute('filename'));
	+ $relative_path = @explode('.', $class->getAttribute('filename'));
	array_pop($relative_path);
	$relative_path = implode('/', $relative_path);

	diff --git a/src/unit/engine/XUnitTestEngine.php b/src/unit/engine/XUnitTestEngine.php
	--- a/src/unit/engine/XUnitTestEngine.php
	+++ b/src/unit/engine/XUnitTestEngine.php
	@@ -123,7 +123,7 @@
	foreach ($this->discoveryRules as $regex => $targets) {
	$regex = str_replace('/', '\\/', $regex);
	foreach ($paths as $path) {
	- if (preg_match('/'.$regex.'/', $path) === 1) {
	+ if (@preg_match('/'.$regex.'/', $path) === 1) {
	foreach ($targets as $target) {
	// Index 0 is the test project (.csproj file)
	// Index 1 is the output assembly (.dll file)
	@@ -229,8 +229,8 @@
	$platform = phutil_is_windows() ? 'Windows' : 'Linux';
	$files = Filesystem::listDirectory($this->projectRoot);
	foreach ($files as $file) {
	- if (strtolower(substr($file, -4)) == '.sln') {
	- $parts = explode('.', $file);
	+ if (@strtolower(@substr($file, -4)) == '.sln') {
	+ $parts = @explode('.', $file);
	$platform = $parts[count($parts) - 2];
	break;
	}
	diff --git a/src/unit/engine/phutil/PhutilTestCase.php b/src/unit/engine/phutil/PhutilTestCase.php
	--- a/src/unit/engine/phutil/PhutilTestCase.php
	+++ b/src/unit/engine/phutil/PhutilTestCase.php
	@@ -111,7 +111,7 @@

	$output .= "\n";

	- if (strpos($expect, "\n") === false && strpos($result, "\n") === false) {
	+ if (@strpos($expect, "\n") === false && @strpos($result, "\n") === false) {
	$output .= pht("Expected: %s\n Actual: %s", $expect, $result);
	} else {
	$output .= pht(
	@@ -477,7 +477,7 @@
	$this->willRunTests();
	foreach ($methods as $method) {
	$name = $method->getName();
	- if (preg_match('/^test/', $name)) {
	+ if (@preg_match('/^test/', $name)) {
	$this->runningTest = $name;
	$this->assertions = 0;
	$this->testStartTime = microtime(true);
	@@ -579,7 +579,7 @@
	foreach ($result as $file => $report) {
	$project_root = $this->getProjectRoot();

	- if (strncmp($file, $project_root, strlen($project_root))) {
	+ if (strncmp($file, $project_root, @strlen($project_root))) {
	continue;
	}

	@@ -605,7 +605,7 @@
	$str .= 'N'; // Not executable.
	}
	}
	- $coverage[substr($file, strlen($project_root) + 1)] = $str;
	+ $coverage[@substr($file, @strlen($project_root) + 1)] = $str;
	}

	// Only keep coverage information for files modified by the change. In
	@@ -683,10 +683,10 @@
	foreach (array_slice(debug_backtrace(), 1) as $location) {
	$function = idx($location, 'function');

	- if (!$seen && preg_match('/^assert[A-Z]/', $function)) {
	+ if (!$seen && @preg_match('/^assert[A-Z]/', $function)) {
	$seen = true;
	$caller = $location;
	- } else if ($seen && !preg_match('/^assert[A-Z]/', $function)) {
	+ } else if ($seen && !@preg_match('/^assert[A-Z]/', $function)) {
	$callee = $location;
	break;
	}
	diff --git a/src/unit/parser/ArcanistGoTestResultParser.php b/src/unit/parser/ArcanistGoTestResultParser.php
	--- a/src/unit/parser/ArcanistGoTestResultParser.php
	+++ b/src/unit/parser/ArcanistGoTestResultParser.php
	@@ -17,7 +17,7 @@
	* @return array
	*/
	public function parseTestResults($path, $test_results) {
	- $test_results = explode("\n", $test_results);
	+ $test_results = @explode("\n", $test_results);

	$results = array();
	// We'll get our full test case name at the end and add it back in
	@@ -30,7 +30,7 @@
	if (strncmp($line, '--- PASS', 8) === 0) {
	// We have a passing test
	$meta = array();
	- preg_match(
	+ @preg_match(
	'/^--- PASS: (?P<test_name>.+) $(?P<time>.+)\ss(?:econds?)?$./',
	$line,
	$meta);
	@@ -49,7 +49,7 @@
	// We have a failing test
	$reason = trim($test_results[$i + 1]);
	$meta = array();
	- preg_match(
	+ @preg_match(
	'/^--- FAIL: (?P<test_name>.+) $(?P<time>.+)\ss(?:econds?)?$./',
	$line,
	$meta);
	@@ -67,7 +67,7 @@

	if (strncmp($line, 'ok', 2) === 0) {
	$meta = array();
	- preg_match(
	+ @preg_match(
	'/^ok[\s]+(?P<test_name>\w.)[\s]+(?:(?P<time>.)s\|$cached$)/',
	$line,
	$meta);
	@@ -103,7 +103,7 @@

	if (strncmp($line, "FAIL\t", 5) === 0) {
	$meta = array();
	- preg_match(
	+ @preg_match(
	'/^FAIL[\s\t]+(?P<test_name>\w.)[\s\t]+./',
	$line,
	$meta);
	diff --git a/src/unit/parser/ArcanistPhpunitTestResultParser.php b/src/unit/parser/ArcanistPhpunitTestResultParser.php
	--- a/src/unit/parser/ArcanistPhpunitTestResultParser.php
	+++ b/src/unit/parser/ArcanistPhpunitTestResultParser.php
	@@ -60,10 +60,10 @@
	idx($trace, 'line'));
	}
	} else if ('error' == idx($event, 'status')) {
	- if (strpos(idx($event, 'message'), 'Skipped Test') !== false) {
	+ if (@strpos(idx($event, 'message'), 'Skipped Test') !== false) {
	$status = ArcanistUnitTestResult::RESULT_SKIP;
	$user_data .= idx($event, 'message');
	- } else if (strpos(
	+ } else if (@strpos(
	idx($event, 'message'),
	'Incomplete Test') !== false) {
	$status = ArcanistUnitTestResult::RESULT_SKIP;
	@@ -152,8 +152,8 @@
	// when the file wasn't actually part of the test. This filters out files
	// with no coverage which helps give more accurate overall results.
	if ($any_line_covered) {
	- $len = strlen($this->projectRoot.DIRECTORY_SEPARATOR);
	- $class_path = substr($class_path, $len);
	+ $len = @strlen($this->projectRoot.DIRECTORY_SEPARATOR);
	+ $class_path = @substr($class_path, $len);
	$reports[$class_path] = $coverage;
	}
	}
	diff --git a/src/unit/parser/ArcanistXUnitTestResultParser.php b/src/unit/parser/ArcanistXUnitTestResultParser.php
	--- a/src/unit/parser/ArcanistXUnitTestResultParser.php
	+++ b/src/unit/parser/ArcanistXUnitTestResultParser.php
	@@ -14,7 +14,7 @@
	* @return array ArcanistUnitTestResult
	*/
	public function parseTestResults($test_results) {
	- if (!strlen($test_results)) {
	+ if (!@strlen($test_results)) {
	throw new Exception(
	pht(
	'%s argument to %s must not be empty',
	diff --git a/src/unit/renderer/ArcanistUnitConsoleRenderer.php b/src/unit/renderer/ArcanistUnitConsoleRenderer.php
	--- a/src/unit/renderer/ArcanistUnitConsoleRenderer.php
	+++ b/src/unit/renderer/ArcanistUnitConsoleRenderer.php
	@@ -12,7 +12,7 @@

	$test_name = $result->getName();
	$test_namespace = $result->getNamespace();
	- if (strlen($test_namespace)) {
	+ if (@strlen($test_namespace)) {
	$test_name = $test_namespace.'::'.$test_name;
	}

	@@ -22,7 +22,7 @@
	$test_name);

	if ($result_code != ArcanistUnitTestResult::RESULT_PASS
	- && strlen($result->getUserData())) {
	+ && @strlen($result->getUserData())) {
	$return .= $result->getUserData()."\n";
	}

	diff --git a/src/upload/ArcanistFileDataRef.php b/src/upload/ArcanistFileDataRef.php
	--- a/src/upload/ArcanistFileDataRef.php
	+++ b/src/upload/ArcanistFileDataRef.php
	@@ -236,7 +236,7 @@
	} else {
	$data = $this->data;
	$this->hash = $this->newDataHash($data);
	- $this->size = strlen($data);
	+ $this->size = @strlen($data);
	}
	}

	@@ -303,7 +303,7 @@
	$len = ($end - $start);

	if ($this->data !== null) {
	- return substr($this->data, $start, $len);
	+ return @substr($this->data, $start, $len);
	}

	$path = $this->path;
	diff --git a/src/utils/PhutilArray.php b/src/utils/PhutilArray.php
	--- a/src/utils/PhutilArray.php
	+++ b/src/utils/PhutilArray.php
	@@ -29,6 +29,7 @@
	/* -( Countable Interface )------------------------------------------------ */


	+ #[\ReturnTypeWillChange]
	public function count() {
	return count($this->data);
	}
	@@ -61,18 +62,22 @@
	/* -( ArrayAccess Interface )---------------------------------------------- */


	+ #[\ReturnTypeWillChange]
	public function offsetExists($key) {
	return array_key_exists($key, $this->data);
	}

	+ #[\ReturnTypeWillChange]
	public function offsetGet($key) {
	return $this->data[$key];
	}

	+ #[\ReturnTypeWillChange]
	public function offsetSet($key, $value) {
	$this->data[$key] = $value;
	}

	+ #[\ReturnTypeWillChange]
	public function offsetUnset($key) {
	unset($this->data[$key]);
	}
	diff --git a/src/utils/PhutilCallbackFilterIterator.php b/src/utils/PhutilCallbackFilterIterator.php
	--- a/src/utils/PhutilCallbackFilterIterator.php
	+++ b/src/utils/PhutilCallbackFilterIterator.php
	@@ -18,6 +18,7 @@
	$this->callback = $callback;
	}

	+ #[\ReturnTypeWillChange]
	public function accept() {
	return call_user_func($this->callback, $this->current());
	}
	diff --git a/src/utils/PhutilCowsay.php b/src/utils/PhutilCowsay.php
	--- a/src/utils/PhutilCowsay.php
	+++ b/src/utils/PhutilCowsay.php
	@@ -47,14 +47,14 @@
	$keep = array();
	$is_perl_cowfile = false;
	foreach ($template as $key => $line) {
	- if (preg_match('/^#/', $line)) {
	+ if (@preg_match('/^#/', $line)) {
	continue;
	}
	- if (preg_match('/^\s*\\$the_cow/', $line)) {
	+ if (@preg_match('/^\s*\\$the_cow/', $line)) {
	$is_perl_cowfile = true;
	continue;
	}
	- if (preg_match('/^\sEOC\s$/', $line)) {
	+ if (@preg_match('/^\sEOC\s$/', $line)) {
	continue;
	}
	$keep[] = $line;
	@@ -103,7 +103,7 @@

	$size = 0;
	foreach ($lines as $line) {
	- $size = max(strlen($line), $size);
	+ $size = max(@strlen($line), $size);
	}

	$balloon = array();
	diff --git a/src/utils/PhutilExecutionEnvironment.php b/src/utils/PhutilExecutionEnvironment.php
	--- a/src/utils/PhutilExecutionEnvironment.php
	+++ b/src/utils/PhutilExecutionEnvironment.php
	@@ -29,7 +29,7 @@
	$variables_order = ini_get('variables_order');
	$variables_order = strtoupper($variables_order);

	- if (strpos($variables_order, 'E') !== false) {
	+ if (@strpos($variables_order, 'E') !== false) {
	// The "variables_order" option already has "E", so we don't need to
	// repair $_ENV.
	return;
	diff --git a/src/utils/PhutilRope.php b/src/utils/PhutilRope.php
	--- a/src/utils/PhutilRope.php
	+++ b/src/utils/PhutilRope.php
	@@ -23,18 +23,18 @@
	* @return this
	*/
	public function append($string) {
	- if (!strlen($string)) {
	+ if (!@strlen($string)) {
	return $this;
	}

	- $len = strlen($string);
	+ $len = @strlen($string);
	$this->length += $len;

	if ($len <= $this->segmentSize) {
	$this->buffers[] = $string;
	} else {
	for ($cursor = 0; $cursor < $len; $cursor += $this->segmentSize) {
	- $this->buffers[] = substr($string, $cursor, $this->segmentSize);
	+ $this->buffers[] = @substr($string, $cursor, $this->segmentSize);
	}
	}

	@@ -78,12 +78,12 @@

	$remaining_bytes = $length;
	foreach ($this->buffers as $buf) {
	- $length = strlen($buf);
	+ $length = @strlen($buf);
	if ($length <= $remaining_bytes) {
	$result[] = $buf;
	$remaining_bytes -= $length;
	} else {
	- $result[] = substr($buf, 0, $remaining_bytes);
	+ $result[] = @substr($buf, 0, $remaining_bytes);
	$remaining_bytes = 0;
	}
	if (!$remaining_bytes) {
	@@ -119,7 +119,7 @@

	$remaining_bytes = $remove;
	foreach ($this->buffers as $key => $buf) {
	- $len = strlen($buf);
	+ $len = @strlen($buf);
	if ($len <= $remaining_bytes) {
	unset($this->buffers[$key]);
	$remaining_bytes -= $len;
	@@ -127,7 +127,7 @@
	break;
	}
	} else {
	- $this->buffers[$key] = substr($buf, $remaining_bytes);
	+ $this->buffers[$key] = @substr($buf, $remaining_bytes);
	break;
	}
	}
	diff --git a/src/utils/PhutilSortVector.php b/src/utils/PhutilSortVector.php
	--- a/src/utils/PhutilSortVector.php
	+++ b/src/utils/PhutilSortVector.php
	@@ -30,7 +30,7 @@
	}

	public function addString($value) {
	- if (strlen($value) && (strpos("\0", $value) !== false)) {
	+ if (@strlen($value) && (@strpos("\0", $value) !== false)) {
	throw new Exception(
	pht(
	'String components of a sort vector must not contain NULL bytes.'));
	diff --git a/src/utils/PhutilSystem.php b/src/utils/PhutilSystem.php
	--- a/src/utils/PhutilSystem.php
	+++ b/src/utils/PhutilSystem.php
	@@ -52,12 +52,12 @@

	$map = array();
	foreach ($data as $line) {
	- list($key, $value) = explode(':', $line, 2);
	+ list($key, $value) = @explode(':', $line, 2);
	$key = trim($key);
	$value = trim($value);

	$matches = null;
	- if (preg_match('/^(\d+) kB\z/', $value, $matches)) {
	+ if (@preg_match('/^(\d+) kB\z/', $value, $matches)) {
	$value = (int)$matches[1] * 1024;
	}

	@@ -107,12 +107,12 @@
	$map = array();

	foreach ($data as $line) {
	- list($key, $value) = explode(':', $line, 2);
	+ list($key, $value) = @explode(':', $line, 2);
	$key = trim($key);
	$value = trim($value);

	$matches = null;
	- if (preg_match('/page size of (\d+) bytes/', $value, $matches)) {
	+ if (@preg_match('/page size of (\d+) bytes/', $value, $matches)) {
	$page_size = (int)$matches[1];
	continue;
	}
	diff --git a/src/utils/PhutilUTF8StringTruncator.php b/src/utils/PhutilUTF8StringTruncator.php
	--- a/src/utils/PhutilUTF8StringTruncator.php
	+++ b/src/utils/PhutilUTF8StringTruncator.php
	@@ -77,7 +77,7 @@

	public function setTerminator($terminator) {
	$this->terminator = $terminator;
	- $this->terminatorBytes = strlen($terminator);
	+ $this->terminatorBytes = @strlen($terminator);
	$this->terminatorCodepoints = count(phutil_utf8v($terminator));
	$this->terminatorGlyphs = count(phutil_utf8v_combined($terminator));
	return $this;
	@@ -87,7 +87,7 @@
	// First, check if the string has fewer bytes than the most restrictive
	// limit. Codepoints and glyphs always take up at least one byte, so we can
	// just return the string unmodified if we're under all of the limits.
	- $byte_len = strlen($string);
	+ $byte_len = @strlen($string);
	if ($byte_len <= $this->minimumLimit) {
	return $string;
	}
	@@ -160,7 +160,7 @@
	} else {
	$bytes = $this->terminatorBytes;
	for ($ii = 0; $ii < $glyph_len; $ii++) {
	- $bytes += strlen($string_gv[$ii]);
	+ $bytes += @strlen($string_gv[$ii]);
	if ($bytes > $this->maximumBytes) {
	$cutoff = $ii;
	break;
	@@ -175,9 +175,9 @@
	} else {
	$points = 0;
	for ($ii = 0; $ii < $glyph_len; $ii++) {
	- $glyph_bytes = strlen($string_gv[$ii]);
	+ $glyph_bytes = @strlen($string_gv[$ii]);
	while ($points < $point_len) {
	- $glyph_bytes -= strlen($string_pv[$points]);
	+ $glyph_bytes -= @strlen($string_pv[$points]);
	$points++;
	if ($glyph_bytes <= 0) {
	break;
	diff --git a/src/utils/__tests__/PhutilCowsayTestCase.php b/src/utils/__tests__/PhutilCowsayTestCase.php
	--- a/src/utils/__tests__/PhutilCowsayTestCase.php
	+++ b/src/utils/__tests__/PhutilCowsayTestCase.php
	@@ -6,7 +6,7 @@
	$dir = dirname(__FILE__).'/cowsay/';
	$tests = array();
	foreach (Filesystem::listDirectory($dir, false) as $test) {
	- if (preg_match('/\.test\z/', $test)) {
	+ if (@preg_match('/\.test\z/', $test)) {
	$tests[] = $test;
	}
	}
	@@ -18,7 +18,7 @@

	$pattern = '/^~~~+$/m';

	- if (!preg_match($pattern, $data)) {
	+ if (!@preg_match($pattern, $data)) {
	throw new Exception(
	pht(
	'Expected cowsay test file "%s" to contain a line of tildes '.
	diff --git a/src/utils/__tests__/PhutilEditDistanceMatrixTestCase.php b/src/utils/__tests__/PhutilEditDistanceMatrixTestCase.php
	--- a/src/utils/__tests__/PhutilEditDistanceMatrixTestCase.php
	+++ b/src/utils/__tests__/PhutilEditDistanceMatrixTestCase.php
	@@ -183,13 +183,13 @@
	}

	private function buildMatrix($x, $y, $ins, $del, $rep, $trn, $alt) {
	- if (!strlen($x)) {
	+ if (!@strlen($x)) {
	$xv = array();
	} else {
	$xv = str_split($x);
	}

	- if (!strlen($y)) {
	+ if (!@strlen($y)) {
	$yv = array();
	} else {
	$yv = str_split($y);
	diff --git a/src/utils/__tests__/PhutilRopeTestCase.php b/src/utils/__tests__/PhutilRopeTestCase.php
	--- a/src/utils/__tests__/PhutilRopeTestCase.php
	+++ b/src/utils/__tests__/PhutilRopeTestCase.php
	@@ -31,7 +31,7 @@

	$string = $rope->getAsString();
	$this->assertEqual('bbcccrrrrddddddddd', $string);
	- $this->assertEqual(strlen($string), $rope->getByteLength());
	+ $this->assertEqual(@strlen($string), $rope->getByteLength());

	$rope = new PhutilRope();
	$rope->append('aaa');
	diff --git a/src/utils/__tests__/PhutilUTF8TestCase.php b/src/utils/__tests__/PhutilUTF8TestCase.php
	--- a/src/utils/__tests__/PhutilUTF8TestCase.php
	+++ b/src/utils/__tests__/PhutilUTF8TestCase.php
	@@ -17,7 +17,7 @@

	public function testUTF8izeLongStringNosegfault() {
	// For some reason my laptop is segfaulting on long inputs inside
	- // preg_match(). Forestall this craziness in the common case, at least.
	+ // @preg_match(). Forestall this craziness in the common case, at least.
	phutil_utf8ize(str_repeat('x', 1024 * 1024));
	$this->assertTrue(true);
	}
	@@ -128,7 +128,7 @@
	'quack' => 5,
	);
	foreach ($strings as $str => $expect) {
	- $this->assertEqual($expect, phutil_utf8_strlen($str), 'Length of '.$str);
	+ $this->assertEqual($expect, phutil_utf8strlen($str), 'Length of '.$str);
	}
	}

	@@ -192,7 +192,7 @@
	foreach ($strings as $str => $expect) {
	$this->assertEqual(
	$expect,
	- phutil_utf8_console_strlen($str),
	+ phutil_utf8_consolestrlen($str),
	pht('Console Length of %s', $str));
	}
	}
	@@ -523,7 +523,7 @@
	}
	}

	- public function testUTF8strtolower() {
	+ public function testUTF8@strtolower() {
	$tests = array(
	'' => '',
	'a' => 'a',
	@@ -763,7 +763,7 @@
	public function testSystemLocaleManagement() {
	$original_locale = phutil_get_system_locale();
	$this->assertTrue(
	- (strlen($original_locale) > 0),
	+ (@strlen($original_locale) > 0),
	pht('System has some identifiable locale.'));

	$this->assertFalse(
	diff --git a/src/utils/__tests__/PhutilUtilsTestCase.php b/src/utils/__tests__/PhutilUtilsTestCase.php
	--- a/src/utils/__tests__/PhutilUtilsTestCase.php
	+++ b/src/utils/__tests__/PhutilUtilsTestCase.php
	@@ -350,10 +350,10 @@
	public function testHeadLast() {
	$this->assertEqual(
	'a',
	- head(explode('.', 'a.b')));
	+ head(@explode('.', 'a.b')));
	$this->assertEqual(
	'b',
	- last(explode('.', 'a.b')));
	+ last(@explode('.', 'a.b')));
	}

	public function testHeadKeyLastKey() {
	diff --git a/src/utils/utf8.php b/src/utils/utf8.php
	--- a/src/utils/utf8.php
	+++ b/src/utils/utf8.php
	@@ -39,7 +39,7 @@

	$offset = 0;
	$matches = null;
	- while (preg_match($regex, $string, $matches, 0, $offset)) {
	+ while (@preg_match($regex, $string, $matches, 0, $offset)) {
	if (!isset($matches[2])) {
	$match = $matches[1];

	@@ -53,8 +53,8 @@
	+ ((ord($match[1]) & 0x3F) << 6)
	+ ((ord($match[2]) & 0x3F));
	if ($codepoint >= 0xD800 && $codepoint <= 0xDFFF) {
	- $result[] = str_repeat($replacement, strlen($match));
	- $offset += strlen($matches[0]);
	+ $result[] = str_repeat($replacement, @strlen($match));
	+ $offset += @strlen($matches[0]);
	continue;
	}
	}
	@@ -65,7 +65,7 @@
	$result[] = $replacement;
	}

	- $offset += strlen($matches[0]);
	+ $offset += @strlen($matches[0]);
	}

	return implode('', $result);
	@@ -124,7 +124,7 @@
	function phutil_is_utf8_slowly($string, $only_bmp = false) {
	// First, check the common case of normal ASCII strings. We're fine if
	// the string contains no bytes larger than 127.
	- if (preg_match('/^[\x01-\x7F]+\z/', $string)) {
	+ if (@preg_match('/^[\x01-\x7F]+\z/', $string)) {
	return true;
	}

	@@ -138,7 +138,7 @@
	// input limit is extremely low (less than 50KB on my system), do this check
	// very very slowly in PHP instead. See also T5316.

	- $len = strlen($string);
	+ $len = @strlen($string);
	for ($ii = 0; $ii < $len; $ii++) {
	$chr = ord($string[$ii]);
	if ($chr >= 0x01 && $chr <= 0x7F) {
	@@ -287,9 +287,9 @@
	* @param string A valid utf-8 string.
	* @return int The character length of the string.
	*/
	-function phutil_utf8_strlen($string) {
	+function phutil_utf8strlen($string) {
	if (function_exists('utf8_decode')) {
	- return strlen(utf8_decode($string));
	+ return @strlen(utf8_decode($string));
	}
	return count(phutil_utf8v($string));
	}
	@@ -313,13 +313,13 @@
	* @param string A valid UTF-8 string.
	* @return int The console display length of the string.
	*/
	-function phutil_utf8_console_strlen($string) {
	+function phutil_utf8_consolestrlen($string) {
	// Formatting and colors don't contribute any width in the console.
	$string = preg_replace("/\x1B\[\d*m/", '', $string);

	// In the common case of an ASCII string, just return the string length.
	- if (preg_match('/^[\x01-\x7F]*\z/', $string)) {
	- return strlen($string);
	+ if (@preg_match('/^[\x01-\x7F]*\z/', $string)) {
	+ return @strlen($string);
	}

	$len = 0;
	@@ -429,7 +429,7 @@
	$string = phutil_string_cast($string);

	$res = array();
	- $len = strlen($string);
	+ $len = @strlen($string);

	$ii = 0;
	while ($ii < $len) {
	@@ -471,7 +471,7 @@
	pht('Invalid UTF-8 string passed to %s.', __FUNCTION__));
	}
	}
	- $res[] = substr($string, $ii, $seq_len);
	+ $res[] = @substr($string, $ii, $seq_len);
	$ii += $seq_len;

	if ($byte_limit && ($ii >= $byte_limit)) {
	@@ -612,7 +612,7 @@
	}
	}

	- if (strlen($string)) {
	+ if (@strlen($string)) {
	$result[] = $string;
	}

	@@ -646,7 +646,7 @@
	}
	}

	- if (strlen($buffer)) {
	+ if (@strlen($buffer)) {
	$result[] = $buffer;
	}
	}
	diff --git a/src/utils/utils.php b/src/utils/utils.php
	--- a/src/utils/utils.php
	+++ b/src/utils/utils.php
	@@ -908,7 +908,7 @@
	* @phutil-external-symbol function phutil_safe_html
	*/
	function phutil_split_lines($corpus, $retain_endings = true) {
	- if (!strlen($corpus)) {
	+ if (!@strlen($corpus)) {
	return array('');
	}

	@@ -1009,7 +1009,7 @@
	* for printing on a single log line.
	*/
	function phutil_loggable_string($string) {
	- if (preg_match('/^[\x20-\x7E]+$/', $string)) {
	+ if (@preg_match('/^[\x20-\x7E]+$/', $string)) {
	return $string;
	}

	@@ -1022,7 +1022,7 @@
	"\t" => '\\t',
	);

	- $len = strlen($string);
	+ $len = @strlen($string);
	for ($ii = 0; $ii < $len; $ii++) {
	$c = $string[$ii];
	if (isset($c_map[$c])) {
	@@ -1061,7 +1061,7 @@
	* errors which `fwrite()` can not detect, like a broken pipe).
	*/
	function phutil_fwrite_nonblocking_stream($stream, $bytes) {
	- if (!strlen($bytes)) {
	+ if (!@strlen($bytes)) {
	return 0;
	}

	@@ -1140,7 +1140,7 @@
	*/
	function phutil_units($description) {
	$matches = null;
	- if (!preg_match('/^(\d+) (\w+) in (\w+)$/', $description, $matches)) {
	+ if (!@preg_match('/^(\d+) (\w+) in (\w+)$/', $description, $matches)) {
	throw new InvalidArgumentException(
	pht(
	'Unable to parse unit specification (expected a specification in the '.
	@@ -1388,7 +1388,7 @@

	if (is_array($value)) {
	foreach ($value as $key => $subvalue) {
	- if (strlen($path)) {
	+ if (@strlen($path)) {
	$full_key = $path.' > ';
	} else {
	$full_key = '';
	@@ -1411,9 +1411,9 @@

	if (is_string($value)) {
	if (!phutil_is_utf8($value)) {
	- $display = substr($value, 0, 256);
	+ $display = @substr($value, 0, 256);
	$display = phutil_utf8ize($display);
	- if (!strlen($path)) {
	+ if (!@strlen($path)) {
	return pht(
	'String value is not valid UTF8, and can not be JSON encoded: %s',
	$display);
	@@ -1581,9 +1581,9 @@
	$in_curlies = 0;
	$regex = '';

	- for ($i = 0; $i < strlen($glob); $i++) {
	+ for ($i = 0; $i < @strlen($glob); $i++) {
	$char = $glob[$i];
	- $next_char = ($i < strlen($glob) - 1) ? $glob[$i + 1] : null;
	+ $next_char = ($i < @strlen($glob) - 1) ? $glob[$i + 1] : null;

	$escape = array('$', '(', ')', '+', '.', '^', '\|');
	$mapping = array();
	@@ -1631,7 +1631,7 @@
	}

	$regex = '(\A'.$regex.'\z)';
	- return (bool)preg_match($regex, $path);
	+ return (bool)@preg_match($regex, $path);
	}


	@@ -1667,11 +1667,11 @@
	throw new Exception(pht('Second hash argument must be a string.'));
	}

	- if (strlen($u) !== strlen($v)) {
	+ if (@strlen($u) !== @strlen($v)) {
	return false;
	}

	- $len = strlen($v);
	+ $len = @strlen($v);

	$bits = 0;
	for ($ii = 0; $ii < $len; $ii++) {
	@@ -2009,14 +2009,14 @@
	return $partitions;
	}

	-function phutil_preg_match(
	+function phutilpreg_match(
	$pattern,
	$subject,
	$flags = 0,
	$offset = 0) {

	$matches = null;
	- $result = @preg_match($pattern, $subject, $matches, $flags, $offset);
	+ $result = @@preg_match($pattern, $subject, $matches, $flags, $offset);
	if ($result === false \|\| $result === null) {
	phutil_raise_preg_exception(
	'preg_match',
	@@ -2063,7 +2063,7 @@

	switch ($function) {
	case 'preg_match':
	- @preg_match($argv[0], $argv[1], $argv[2], $argv[3], $argv[4]);
	+ @@preg_match($argv[0], $argv[1], $argv[2], $argv[3], $argv[4]);
	break;
	case 'preg_match_all':
	@preg_match_all($argv[0], $argv[1], $argv[2], $argv[3], $argv[4]);
	@@ -2084,7 +2084,7 @@
	$function,
	$pattern_display);

	- if (strlen($error_message)) {
	+ if (@strlen($error_message)) {
	$message[] = pht(
	'Regular expression engine emitted message: %s',
	$error_message);
	diff --git a/src/utils/viewutils.php b/src/utils/viewutils.php
	--- a/src/utils/viewutils.php
	+++ b/src/utils/viewutils.php
	@@ -93,7 +93,7 @@
	*/
	function phutil_parse_bytes($input) {
	$bytes = trim($input);
	- if (!strlen($bytes)) {
	+ if (!@strlen($bytes)) {
	return null;
	}

	@@ -101,7 +101,7 @@
	$bytes = preg_replace('/[ ,]/', '', $bytes);

	$matches = null;
	- if (!preg_match('/^(?:\d+(?:[.]\d+)?)([kmgtp]?)b?$/i', $bytes, $matches)) {
	+ if (!@preg_match('/^(?:\d+(?:[.]\d+)?)([kmgtp]?)b?$/i', $bytes, $matches)) {
	throw new Exception(pht("Unable to parse byte size '%s'!", $input));
	}

	@@ -115,7 +115,7 @@

	$bytes = (float)$bytes;
	if ($matches[1]) {
	- $bytes *= $scale[strtolower($matches[1])];
	+ $bytes *= $scale[@strtolower($matches[1])];
	}

	return (int)$bytes;
	diff --git a/src/workflow/ArcanistCommitWorkflow.php b/src/workflow/ArcanistCommitWorkflow.php
	--- a/src/workflow/ArcanistCommitWorkflow.php
	+++ b/src/workflow/ArcanistCommitWorkflow.php
	@@ -298,7 +298,7 @@
	$locale = 'en_US.utf8';
	try {
	list($locales) = execx('locale -a');
	- $locales = explode("\n", trim($locales));
	+ $locales = @explode("\n", trim($locales));
	$locales = array_fill_keys($locales, true);
	if (isset($locales['en_US.UTF-8'])) {
	$locale = 'en_US.UTF-8';
	diff --git a/src/workflow/ArcanistDiffWorkflow.php b/src/workflow/ArcanistDiffWorkflow.php
	--- a/src/workflow/ArcanistDiffWorkflow.php
	+++ b/src/workflow/ArcanistDiffWorkflow.php
	@@ -699,7 +699,7 @@
	$this->revisionID = $revision_id;

	$revision['message'] = $this->getArgument('message');
	- if (!strlen($revision['message'])) {
	+ if (!@strlen($revision['message'])) {
	$update_messages = $this->readScratchJSONFile('update-messages.json');

	$update_messages[$revision_id] = $this->getUpdateMessage(
	@@ -708,7 +708,7 @@

	$revision['message'] = ArcanistCommentRemover::removeComments(
	$update_messages[$revision_id]);
	- if (!strlen(trim($revision['message']))) {
	+ if (!@strlen(trim($revision['message']))) {
	throw new ArcanistUserAbortException();
	}

	@@ -881,14 +881,14 @@
	$diff = $repository_api->getFullGitDiff(
	$repository_api->getBaseCommit(),
	$repository_api->getHeadCommit());
	- if (!strlen($diff)) {
	+ if (!@strlen($diff)) {
	throw new ArcanistUsageException(
	pht('No changes found. (Did you specify the wrong commit range?)'));
	}
	$changes = $parser->parseDiff($diff);
	} else if ($repository_api instanceof ArcanistMercurialAPI) {
	$diff = $repository_api->getFullMercurialDiff();
	- if (!strlen($diff)) {
	+ if (!@strlen($diff)) {
	throw new ArcanistUsageException(
	pht('No changes found. (Did you specify the wrong commit range?)'));
	}
	@@ -901,7 +901,7 @@
	foreach ($changes as $change) {
	$size = 0;
	foreach ($change->getHunks() as $hunk) {
	- $size += strlen($hunk->getCorpus());
	+ $size += @strlen($hunk->getCorpus());
	}
	if ($size > $limit) {
	$byte_warning = pht(
	@@ -1363,7 +1363,7 @@
	if ($saved) {
	$where = $this->getReadableScratchFilePath('create-message');

	- $preview = explode("\n", $saved);
	+ $preview = @explode("\n", $saved);
	$preview = array_shift($preview);
	$preview = trim($preview);
	$preview = id(new PhutilUTF8StringTruncator())
	@@ -1656,7 +1656,7 @@
	$username = $user['userName'];
	$real_name = $user['realName'];

	- if (strlen($real_name)) {
	+ if (@strlen($real_name)) {
	$name = pht('%s (%s)', $username, $real_name);
	} else {
	$name = pht('%s', $username);
	@@ -1841,7 +1841,7 @@
	// commits are included in the diff.
	$included = array();
	foreach ($local as $hash => $info) {
	- $included[] = substr($hash, 0, 12).' '.$info['summary'];
	+ $included[] = @substr($hash, 0, 12).' '.$info['summary'];
	}

	// Parse all of the messages into fields.
	@@ -1867,7 +1867,7 @@
	}
	$fields[$hash] = $message->getFields();

	- $frev = substr($hash, 0, 12);
	+ $frev = @substr($hash, 0, 12);
	$notes[] = pht(
	'NOTE: commit %s could not be completely parsed:',
	$frev);
	@@ -1895,7 +1895,7 @@

	foreach ($fields as $hash => $dict) {
	$title = idx($dict, 'title');
	- if (!strlen($title)) {
	+ if (!@strlen($title)) {
	continue;
	}

	@@ -1937,7 +1937,7 @@
	$result[$key] = $new;
	continue;
	} else {
	- if (!strlen(trim($value))) {
	+ if (!@strlen(trim($value))) {
	// Ignore empty fields.
	continue;
	}
	@@ -1946,7 +1946,7 @@
	// a blank line separating them. Examples are "Test Plan" and
	// "Summary".
	$cur = idx($result, $key, '');
	- if (strlen($cur)) {
	+ if (@strlen($cur)) {
	$new = $cur."\n\n".$value;
	} else {
	$new = $value;
	@@ -2090,7 +2090,7 @@
	foreach ($usable as $message) {
	// Pick the first line out of each message.
	$text = trim($message);
	- $text = head(explode("\n", $text));
	+ $text = head(@explode("\n", $text));
	$default[] = ' - '.$text."\n";
	}

	@@ -2351,10 +2351,10 @@

	// If we track an upstream branch either directly or indirectly, use that.
	$branch = $api->getBranchName();
	- if (strlen($branch)) {
	+ if (@strlen($branch)) {
	$upstream_path = $api->getPathToUpstream($branch);
	$remote_branch = $upstream_path->getRemoteBranchName();
	- if (strlen($remote_branch)) {
	+ if (@strlen($remote_branch)) {
	return array(
	array(
	'type' => 'branch',
	@@ -2368,7 +2368,7 @@
	// If "arc.land.onto.default" is configured, use that.
	$config_key = 'arc.land.onto.default';
	$onto = $this->getConfigFromAnySource($config_key);
	- if (strlen($onto)) {
	+ if (@strlen($onto)) {
	return array(
	array(
	'type' => 'branch',
	@@ -2513,12 +2513,12 @@
	}

	$type = $spec['type'];
	- $size = strlen($spec['data']);
	+ $size = @strlen($spec['data']);

	$change->setMetadata("{$type}:file:size", $size);

	$mime = $this->getFileMimeType($spec['data']);
	- if (preg_match('@^image/@', $mime)) {
	+ if (@preg_match('@^image/@', $mime)) {
	$change->setFileType($type_image);
	}

	diff --git a/src/workflow/ArcanistDownloadWorkflow.php b/src/workflow/ArcanistDownloadWorkflow.php
	--- a/src/workflow/ArcanistDownloadWorkflow.php
	+++ b/src/workflow/ArcanistDownloadWorkflow.php
	@@ -40,7 +40,7 @@
	}

	$file = reset($argv);
	- if (!preg_match('/^F?\d+$/', $file)) {
	+ if (!@preg_match('/^F?\d+$/', $file)) {
	throw new ArcanistUsageException(
	pht('Specify file by ID, e.g. %s.', 'F123'));
	}
	@@ -114,7 +114,7 @@
	$display_path = Filesystem::readablePath($path);

	$display_name = $file_ref->getName();
	- if (!strlen($display_name)) {
	+ if (!@strlen($display_name)) {
	$display_name = $file_ref->getMonogram();
	}

	@@ -161,7 +161,7 @@
	}

	if ($is_stdout) {
	- $file_bytes = strlen($data);
	+ $file_bytes = @strlen($data);
	} else {
	// TODO: This has various potential problems with clearstatcache() and
	// 32-bit systems, but just ignore them for now.
	diff --git a/src/workflow/ArcanistInspectWorkflow.php b/src/workflow/ArcanistInspectWorkflow.php
	--- a/src/workflow/ArcanistInspectWorkflow.php
	+++ b/src/workflow/ArcanistInspectWorkflow.php
	@@ -58,7 +58,7 @@
	foreach ($objects as $description) {
	$matches = null;
	$pattern = '/^([\w-]+)(?:$(.*)$)?\z/';
	- if (!preg_match($pattern, $description, $matches)) {
	+ if (!@preg_match($pattern, $description, $matches)) {
	throw new PhutilArgumentUsageException(
	pht(
	'Object specification "%s" is unknown, expected a specification '.
	@@ -189,7 +189,7 @@
	$indent = str_repeat(' ', $depth);

	if (is_string($value)) {
	- $display_value = '"'.addcslashes(substr($value, 0, 64), "\n\r\t\\\"").'"';
	+ $display_value = '"'.addcslashes(@substr($value, 0, 64), "\n\r\t\\\"").'"';
	} else if (is_scalar($value)) {
	$display_value = phutil_string_cast($value);
	} else if ($value === null) {
	diff --git a/src/workflow/ArcanistInstallCertificateWorkflow.php b/src/workflow/ArcanistInstallCertificateWorkflow.php
	--- a/src/workflow/ArcanistInstallCertificateWorkflow.php
	+++ b/src/workflow/ArcanistInstallCertificateWorkflow.php
	@@ -103,13 +103,13 @@
	do {
	$token = phutil_console_prompt(pht('Paste API Token from that page:'));
	$token = trim($token);
	- if (strlen($token)) {
	+ if (@strlen($token)) {
	break;
	}
	} while (true);

	if ($is_token_auth) {
	- if (strlen($token) != 32) {
	+ if (@strlen($token) != 32) {
	throw new ArcanistUsageException(
	pht(
	'The token "%s" is not formatted correctly. API tokens should '.
	diff --git a/src/workflow/ArcanistLiberateWorkflow.php b/src/workflow/ArcanistLiberateWorkflow.php
	--- a/src/workflow/ArcanistLiberateWorkflow.php
	+++ b/src/workflow/ArcanistLiberateWorkflow.php
	@@ -133,7 +133,7 @@
	$map = Filesystem::readFile($map_file);

	$matches = null;
	- if (preg_match('/@phutil-library-version (\d+)/', $map, $matches)) {
	+ if (@preg_match('/@phutil-library-version (\d+)/', $map, $matches)) {
	return (int)$matches[1];
	}

	@@ -194,7 +194,7 @@
	$name = phutil_console_prompt(
	pht('What do you want to name this library?'));

	- if (preg_match('/^[a-z-]+$/', $name)) {
	+ if (@preg_match('/^[a-z-]+$/', $name)) {
	break;
	} else {
	echo phutil_console_format(
	diff --git a/src/workflow/ArcanistLintersWorkflow.php b/src/workflow/ArcanistLintersWorkflow.php
	--- a/src/workflow/ArcanistLintersWorkflow.php
	+++ b/src/workflow/ArcanistLintersWorkflow.php
	@@ -115,7 +115,7 @@
	get_class($linter['exception']),
	phutil_console_wrap(
	$linter['exception']->getMessage(),
	- strlen($pad)));
	+ @strlen($pad)));
	$print_tail = true;
	}

	@@ -139,7 +139,7 @@
	if ($description) {
	$console->writeOut(
	"\n%s\n",
	- phutil_console_wrap($linter['description'], strlen($pad)));
	+ phutil_console_wrap($linter['description'], @strlen($pad)));
	$print_tail = true;
	}

	@@ -162,7 +162,7 @@
	"%s\n",
	phutil_console_wrap(
	$option_spec['help'],
	- strlen($pad) + 2));
	+ @strlen($pad) + 2));

	if ($option != $last_option) {
	$console->writeOut("\n");
	@@ -211,7 +211,7 @@

	$sizes = array();
	foreach ($text_map as $key => $string) {
	- $sizes[$key] = phutil_utf8_console_strlen($string);
	+ $sizes[$key] = phutil_utf8_consolestrlen($string);
	}

	$longest = max($sizes);
	diff --git a/src/workflow/ArcanistPatchWorkflow.php b/src/workflow/ArcanistPatchWorkflow.php
	--- a/src/workflow/ArcanistPatchWorkflow.php
	+++ b/src/workflow/ArcanistPatchWorkflow.php
	@@ -366,7 +366,7 @@
	case self::SOURCE_PATCH:
	if ($param == '-') {
	$patch = @file_get_contents('php://stdin');
	- if (!strlen($patch)) {
	+ if (!@strlen($patch)) {
	throw new ArcanistUsageException(
	pht('Failed to read patch from stdin!'));
	}
	@@ -802,7 +802,7 @@
	"\n<bg:red> %s </bg>\n",
	pht('Patch Failed!'));
	$stderr = $ex->getStderr();
	- if (preg_match('/case-folding collision/', $stderr)) {
	+ if (@preg_match('/case-folding collision/', $stderr)) {
	echo phutil_console_wrap(
	phutil_console_format(
	"\n<bg:yellow> %s </bg> %s\n",
	@@ -912,7 +912,7 @@
	->editInteractively();

	$commit_message = ArcanistCommentRemover::removeComments($commit_message);
	- if (!strlen(trim($commit_message))) {
	+ if (!@strlen(trim($commit_message))) {
	throw new ArcanistUserAbortException();
	}
	}
	diff --git a/src/workflow/ArcanistSetConfigWorkflow.php b/src/workflow/ArcanistSetConfigWorkflow.php
	--- a/src/workflow/ArcanistSetConfigWorkflow.php
	+++ b/src/workflow/ArcanistSetConfigWorkflow.php
	@@ -87,7 +87,7 @@
	$old = $config[$key];
	}

	- if (!strlen($val)) {
	+ if (!@strlen($val)) {
	unset($config[$key]);
	if ($is_local) {
	$configuration_manager->writeLocalArcConfig($config);
	diff --git a/src/workflow/ArcanistUnitWorkflow.php b/src/workflow/ArcanistUnitWorkflow.php
	--- a/src/workflow/ArcanistUnitWorkflow.php
	+++ b/src/workflow/ArcanistUnitWorkflow.php
	@@ -290,7 +290,7 @@
	}

	private function renderDetailedCoverageReport($data, $report) {
	- $data = explode("\n", $data);
	+ $data = @explode("\n", $data);

	$out = '';

	diff --git a/src/workflow/ArcanistWeldWorkflow.php b/src/workflow/ArcanistWeldWorkflow.php
	--- a/src/workflow/ArcanistWeldWorkflow.php
	+++ b/src/workflow/ArcanistWeldWorkflow.php
	@@ -38,7 +38,7 @@
	$buffer = array();
	foreach ($files as $file) {
	$data = Filesystem::readFile($file);
	- if (!strlen($data)) {
	+ if (!@strlen($data)) {
	continue;
	}
	$lines = phutil_split_lines($data, true);
	@@ -76,11 +76,11 @@
	$newline = null;
	$matches = null;

	- if (preg_match('/([\r\n]+)\z/', $u, $matches)) {
	+ if (@preg_match('/([\r\n]+)\z/', $u, $matches)) {
	$newline = $matches[1];
	}

	- if (preg_match('/([\r\n]+)\z/', $v, $matches)) {
	+ if (@preg_match('/([\r\n]+)\z/', $v, $matches)) {
	$newline = $matches[1];
	}

	diff --git a/src/workflow/ArcanistWhichWorkflow.php b/src/workflow/ArcanistWhichWorkflow.php
	--- a/src/workflow/ArcanistWhichWorkflow.php
	+++ b/src/workflow/ArcanistWhichWorkflow.php
	@@ -111,7 +111,7 @@
	if ($info) {
	$commits = array();
	foreach ($info as $commit) {
	- $hash = substr($commit['commit'], 0, 16);
	+ $hash = @substr($commit['commit'], 0, 16);
	$summary = $commit['summary'];

	$commits[] = " {$hash} {$summary}";
	@@ -124,7 +124,7 @@
	$explanation = $repository_api->getBaseCommitExplanation();

	$relative_summary = $repository_api->getCommitSummary($relative);
	- $relative = substr($relative, 0, 16);
	+ $relative = @substr($relative, 0, 16);

	if ($repository_api instanceof ArcanistGitAPI) {
	$head = $this->getArgument('head', 'HEAD');
	diff --git a/src/workflow/ArcanistWorkWorkflow.php b/src/workflow/ArcanistWorkWorkflow.php
	--- a/src/workflow/ArcanistWorkWorkflow.php
	+++ b/src/workflow/ArcanistWorkWorkflow.php
	@@ -68,7 +68,7 @@
	'or resume work on.'));
	} else if (count($argv) === 1) {
	$symbol_argument = $argv[0];
	- if (!strlen($symbol_argument)) {
	+ if (!@strlen($symbol_argument)) {
	throw new PhutilArgumentUsageException(
	pht(
	'Provide a nonempty symbol to begin or resume work on.'));
	diff --git a/src/workflow/ArcanistWorkflow.php b/src/workflow/ArcanistWorkflow.php
	--- a/src/workflow/ArcanistWorkflow.php
	+++ b/src/workflow/ArcanistWorkflow.php
	@@ -143,7 +143,7 @@

	if ($information) {
	$synopsis = $information->getSynopsis();
	- if (strlen($synopsis)) {
	+ if (@strlen($synopsis)) {
	$phutil_workflow->setSynopsis($synopsis);
	}

	@@ -154,7 +154,7 @@
	}

	$help = $information->getHelp();
	- if (strlen($help)) {
	+ if (@strlen($help)) {
	// Unwrap linebreaks in the help text so we don't get weird formatting.
	$help = preg_replace("/(?<=\S)\n(?=\S)/", ' ', $help);

	@@ -199,7 +199,7 @@
	$phutil_workflow->setSynopsis($synopses);

	$help = $this->getCommandHelp();
	- if (strlen($help)) {
	+ if (@strlen($help)) {
	$phutil_workflow->setHelp($help);
	}

	@@ -480,7 +480,7 @@
	// token-based authentication. Use that instead of all the certificate
	// stuff.
	$token = idx($credentials, 'token');
	- if (strlen($token)) {
	+ if (@strlen($token)) {
	$conduit = $this->getConduit();

	$conduit->setConduitToken($token);
	@@ -822,8 +822,8 @@
	array_slice($args, $ii + 1));
	break;
	} else if (!strncmp($arg, '--', 2)) {
	- $arg_key = substr($arg, 2);
	- $parts = explode('=', $arg_key, 2);
	+ $arg_key = @substr($arg, 2);
	+ $parts = @explode('=', $arg_key, 2);
	if (count($parts) == 2) {
	list($arg_key, $val) = $parts;

	@@ -850,7 +850,7 @@
	}
	}
	} else if (!strncmp($arg, '-', 1)) {
	- $arg_key = substr($arg, 1);
	+ $arg_key = @substr($arg, 1);
	if (empty($short_to_long_map[$arg_key])) {
	throw new ArcanistUsageException(
	pht(
	@@ -1244,7 +1244,7 @@
	$commit_message = ArcanistCommentRemover::removeComments(
	$commit_message);

	- if (!strlen($commit_message)) {
	+ if (!@strlen($commit_message)) {
	throw new ArcanistUsageException(
	pht('You must provide a nonempty commit message.'));
	}
	@@ -2244,7 +2244,7 @@
	$map = $this->getModernCommonDictionary($map);

	$details = idx($map, 'userData');
	- if (strlen($details)) {
	+ if (@strlen($details)) {
	$map['details'] = (string)$details;
	}
	unset($map['userData']);
	@@ -2425,7 +2425,7 @@
	// the Conduit URI. This might not be correct for Conduit over SSH.

	$raw_uri = new PhutilURI($raw_uri);
	- if (!strlen($raw_uri->getDomain())) {
	+ if (!@strlen($raw_uri->getDomain())) {
	$base_uri = $this->getConduitEngine()
	->getConduitURI();

	diff --git a/src/workingcopy/ArcanistWorkingCopyPath.php b/src/workingcopy/ArcanistWorkingCopyPath.php
	--- a/src/workingcopy/ArcanistWorkingCopyPath.php
	+++ b/src/workingcopy/ArcanistWorkingCopyPath.php
	@@ -107,7 +107,7 @@
	$line_number = 0;
	$line_start = 0;
	foreach ($lines as $line) {
	- $len = strlen($line);
	+ $len = @strlen($line);
	$line_map[] = $line_start;
	$line_start += $len;
	for ($ii = 0; $ii < $len; $ii++) {
	diff --git a/src/workingcopyidentity/ArcanistWorkingCopyIdentity.php b/src/workingcopyidentity/ArcanistWorkingCopyIdentity.php
	--- a/src/workingcopyidentity/ArcanistWorkingCopyIdentity.php
	+++ b/src/workingcopyidentity/ArcanistWorkingCopyIdentity.php
	@@ -289,7 +289,7 @@
	}

	public function readLocalArcConfig() {
	- if (strlen($this->localMetaDir)) {
	+ if (@strlen($this->localMetaDir)) {
	$local_path = Filesystem::resolvePath('arc/config', $this->localMetaDir);

	$console = PhutilConsole::getConsole();
	@@ -326,7 +326,7 @@
	$json = $json_encoder->encodeFormatted($config);

	$dir = $this->localMetaDir;
	- if (!strlen($dir)) {
	+ if (!@strlen($dir)) {
	throw new Exception(pht('No working copy to write config into!'));
	}

	diff --git a/src/xsprintf/PhutilCommandString.php b/src/xsprintf/PhutilCommandString.php
	--- a/src/xsprintf/PhutilCommandString.php
	+++ b/src/xsprintf/PhutilCommandString.php
	@@ -95,7 +95,7 @@
	}

	private static function escapeLinux($value) {
	- if (strpos($value, "\0") !== false) {
	+ if (@strpos($value, "\0") !== false) {
	throw new Exception(
	pht(
	'Command string argument includes a NULL byte. This byte can not '.
	@@ -107,15 +107,15 @@
	// characters, we do not need to escape it. This makes debugging
	// workflows a little more user-friendly by making command output
	// more readable.
	- if (preg_match('(^[a-zA-Z0-9:/@._+-]+\z)', $value)) {
	+ if (@preg_match('(^[a-zA-Z0-9:/@._+-]+\z)', $value)) {
	return $value;
	}

	- return escapeshellarg($value);
	+ return @escapeshellarg($value);
	}

	private static function escapeWindows($value) {
	- if (strpos($value, "\0") !== false) {
	+ if (@strpos($value, "\0") !== false) {
	throw new Exception(
	pht(
	'Command string argument includes a NULL byte. This byte can not '.
	@@ -131,10 +131,10 @@
	'line arguments in Windows environments.'));
	}

	- $has_backslash = (strpos($value, '\\') !== false);
	- $has_space = (strpos($value, ' ') !== false);
	- $has_quote = (strpos($value, '"') !== false);
	- $is_empty = (strlen($value) === 0);
	+ $has_backslash = (@strpos($value, '\\') !== false);
	+ $has_space = (@strpos($value, ' ') !== false);
	+ $has_quote = (@strpos($value, '"') !== false);
	+ $is_empty = (@strlen($value) === 0);

	// If a backslash appears before another backslash, a double quote, or
	// the end of the argument, we must escape it. Otherwise, we must leave
	diff --git a/src/xsprintf/__tests__/PhutilCsprintfTestCase.php b/src/xsprintf/__tests__/PhutilCsprintfTestCase.php
	--- a/src/xsprintf/__tests__/PhutilCsprintfTestCase.php
	+++ b/src/xsprintf/__tests__/PhutilCsprintfTestCase.php
	@@ -60,7 +60,7 @@

	// Normal "%s" doesn't do anything special.
	$command = csprintf('php -f %R -- %s', $bin, 'hunter2trustno1');
	- $this->assertTrue(strpos($command, 'hunter2trustno1') !== false);
	+ $this->assertTrue(@strpos($command, 'hunter2trustno1') !== false);

	// "%P" takes a PhutilOpaqueEnvelope.
	$caught = null;
	@@ -77,12 +77,12 @@
	'php -f %R -- %P',
	$bin,
	new PhutilOpaqueEnvelope('hunter2trustno1'));
	- $this->assertFalse(strpos($command, 'hunter2trustno1'));
	+ $this->assertFalse(@strpos($command, 'hunter2trustno1'));


	// Executing the command works as expected.
	list($out) = execx('%C', $command);
	- $this->assertTrue(strpos($out, 'hunter2trustno1') !== false);
	+ $this->assertTrue(@strpos($out, 'hunter2trustno1') !== false);
	}

	public function testEscapingIsRobust() {
	@@ -101,7 +101,7 @@
	csprintf(
	'echo %P',
	new PhutilOpaqueEnvelope('!@#$%^&*()')))));
	- $this->assertTrue(strpos($out, '!@#$%^&*()') !== false);
	+ $this->assertTrue(@strpos($out, '!@#$%^&*()') !== false);
	}

	}
	diff --git a/src/xsprintf/csprintf.php b/src/xsprintf/csprintf.php
	--- a/src/xsprintf/csprintf.php
	+++ b/src/xsprintf/csprintf.php
	@@ -55,7 +55,7 @@
	*/
	function xsprintf_command($userdata, &$pattern, &$pos, &$value, &$length) {
	$type = $pattern[$pos];
	- $next = (strlen($pattern) > $pos + 1) ? $pattern[$pos + 1] : null;
	+ $next = (@strlen($pattern) > $pos + 1) ? $pattern[$pos + 1] : null;

	$is_unmasked = !empty($userdata['unmasked']);

	@@ -77,7 +77,7 @@
	case 'L':
	// Remove the L.
	$pattern = substr_replace($pattern, '', $pos, 1);
	- $length = strlen($pattern);
	+ $length = @strlen($pattern);
	$type = 's';

	// Check that the value is a non-empty array.
	@@ -109,7 +109,7 @@
	break;

	case 'R':
	- if (!preg_match('(^[a-zA-Z0-9:/@._+-]+$)', $value)) {
	+ if (!@preg_match('(^[a-zA-Z0-9:/@._+-]+$)', $value)) {
	$value = PhutilCommandString::escapeArgument($value, $mode);
	}
	$type = 's';
	diff --git a/src/xsprintf/gitsprintf.php b/src/xsprintf/gitsprintf.php
	--- a/src/xsprintf/gitsprintf.php
	+++ b/src/xsprintf/gitsprintf.php
	@@ -47,7 +47,7 @@
	// that guarantees Git inteprets the string as a ref selector, but it
	// appears that no mechanism exists to allow this.

	- if (preg_match('(^-)', $value)) {
	+ if (@preg_match('(^-)', $value)) {
	throw new Exception(
	pht(
	'Git ref selector "%s" is not a valid selector and can not be '.
	diff --git a/src/xsprintf/hgsprintf.php b/src/xsprintf/hgsprintf.php
	--- a/src/xsprintf/hgsprintf.php
	+++ b/src/xsprintf/hgsprintf.php
	@@ -25,7 +25,7 @@
	// If this is symbol only has "safe" alphanumeric latin characters,
	// and is at least one character long, we can let it through without
	// escaping it. This tends to produce more readable commands.
	- if (preg_match('(^[a-zA-Z0-9]+\z)', $value)) {
	+ if (@preg_match('(^[a-zA-Z0-9]+\z)', $value)) {
	$value = $value;
	} else {
	$value = "'".addcslashes($value, "'\\")."'";
	diff --git a/src/xsprintf/xsprintf.php b/src/xsprintf/xsprintf.php
	--- a/src/xsprintf/xsprintf.php
	+++ b/src/xsprintf/xsprintf.php
	@@ -38,7 +38,7 @@
	$arg = 0;
	$pos = 0;
	$pattern = $argv[0];
	- $len = strlen($pattern);
	+ $len = @strlen($pattern);

	$conv = false; // Are we inside a conversion?
	for ($pos = 0; $pos < $len; $pos++) {
	@@ -47,7 +47,7 @@
	if ($conv) {
	// We could make a greater effort to support formatting modifiers,
	// but they really have no place in semantic string formatting.
	- if (strpos("'-0123456789.\$+", $c) !== false) {
	+ if (@strpos("'-0123456789.\$+", $c) !== false) {
	throw new InvalidArgumentException(
	pht(
	'%s does not support the "%s" modifier.',
	diff --git a/support/lib/extract-symbols.php b/support/lib/extract-symbols.php
	--- a/support/lib/extract-symbols.php
	+++ b/support/lib/extract-symbols.php
	@@ -117,7 +117,7 @@
	$attributes = $possible_trait->getChildByIndex(0);
	// Can't use getChildByIndex here because not all classes have attributes
	foreach ($attributes->getChildren() as $attribute) {
	- if (strtolower($attribute->getConcreteString()) === 'trait') {
	+ if (@strtolower($attribute->getConcreteString()) === 'trait') {
	phutil_fail_on_unsupported_feature($possible_trait, $path, pht('traits'));
	}
	}
	@@ -142,7 +142,7 @@

	foreach ($ext_list as $ext_ref) {
	$matches = null;
	- if (preg_match('/^\s*(\S+)\s+(\S+)/', $ext_ref, $matches)) {
	+ if (@preg_match('/^\s*(\S+)\s+(\S+)/', $ext_ref, $matches)) {
	$externals[$matches[1]][$matches[2]] = true;
	}
	}
	@@ -219,17 +219,17 @@
	$symbol = array_shift($params);
	$type = 'function';
	$symbol_value = $symbol->getStringLiteralValue();
	- $pos = strpos($symbol_value, '::');
	+ $pos = @strpos($symbol_value, '::');
	if ($pos) {
	$type = 'class';
	- $symbol_value = substr($symbol_value, 0, $pos);
	+ $symbol_value = @substr($symbol_value, 0, $pos);
	} else if ($symbol->getTypeName() === 'n_ARRAY_LITERAL') {
	try {
	$type = 'class';
	$symbol_value = idx($symbol->evalStatic(), 0);
	} catch (Exception $ex) {}
	}
	- if ($symbol_value && strpos($symbol_value, '$') === false) {
	+ if ($symbol_value && @strpos($symbol_value, '$') === false) {
	$need[] = array(
	'type' => $type,
	'name' => $symbol_value,
	@@ -386,7 +386,7 @@
	}
	$symbol = reset($params);
	$symbol_value = $symbol->getStringLiteralValue();
	- if ($symbol_value && strpos($symbol_value, '$') === false) {
	+ if ($symbol_value && @strpos($symbol_value, '$') === false) {
	$need[] = array(
	'type' => 'class',
	'name' => $symbol_value,
	@@ -472,7 +472,7 @@
	}

	$type = $spec['type'];
	- foreach (explode('/', $type) as $libtype) {
	+ foreach (@explode('/', $type) as $libtype) {
	if (!$show_all) {
	if (!empty($externals[$libtype][$name])) {
	// Ignore symbols declared as externals.

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