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PHP 8.1 "explode(null)" exception blocks rendering the Multimeter page
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Description

  1. PHP 8.2.5; Phorge at e9e2c954132cf9d548e0ac9eb7f75c88f8308c8d
  2. ./bin/config set phabricator.show-prototypes true
  3. Go to http://phorge.localhost/applications/
  4. Under Developer Tools, select Multimeter to go to http://phorge.localhost/multimeter/
[2023-05-06 22:30:04] EXCEPTION: (RuntimeException) explode(): Passing null to parameter #2 ($string) of type string is deprecated at [<arcanist>/src/error/PhutilErrorHandler.php:261]
arcanist(head=renderDashboardTabPanelContent, ref.master=d47289622650, ref.renderDashboardTabPanelContent=d47289622650), phorge(head=multimeter, ref.master=e9e2c954132c, ref.multimeter=e9e2c954132c)
  #0 <#2> PhutilErrorHandler::handleError(integer, string, string, integer) called at [<arcanist>/src/error/PhutilErrorHandler.php:261]
  #1 <#2> explode(string, NULL) called at [<phorge>/src/applications/multimeter/controller/MultimeterSampleController.php:13]
  #2 <#2> MultimeterSampleController::handleRequest(AphrontRequest) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:284]
  #3 phlog(RuntimeException) called at [<phorge>/src/aphront/handler/PhabricatorDefaultRequestExceptionHandler.php:41]
  #4 PhabricatorDefaultRequestExceptionHandler::handleRequestThrowable(AphrontRequest, RuntimeException) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:751]
  #5 AphrontApplicationConfiguration::handleThrowable(RuntimeException) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:296]
  #6 AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink, MultimeterControl) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:203]
  #7 AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phorge>/webroot/index.php:35]
[2023-05-06 22:30:04] EXCEPTION: (PhutilAggregateException) Encountered a processing exception, then another exception when trying to build a response for the first exception.
    - RuntimeException: file_exists(): Passing null to parameter #1 ($filename) of type string is deprecated
    - RuntimeException: explode(): Passing null to parameter #2 ($string) of type string is deprecated at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:316]
arcanist(head=renderDashboardTabPanelContent, ref.master=d47289622650, ref.renderDashboardTabPanelContent=d47289622650), phorge(head=multimeter, ref.master=e9e2c954132c, ref.multimeter=e9e2c954132c)
  #0 <#4> explode(string, NULL) called at [<phorge>/src/applications/multimeter/controller/MultimeterSampleController.php:13]
  #1 <#4> MultimeterSampleController::handleRequest(AphrontRequest) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:284]
  #2 <#3> PhutilErrorHandler::handleError(integer, string, string, integer) called at [<arcanist>/src/error/PhutilErrorHandler.php:261]
  #3 <#3> file_exists(NULL) called at [<arcanist>/src/filesystem/Filesystem.php:1068]
  #4 <#3> Filesystem::pathExists(NULL) called at [<arcanist>/src/filesystem/Filesystem.php:1169]
  #5 <#3> Filesystem::assertExists(NULL) called at [<arcanist>/src/filesystem/Filesystem.php:1020]
  #6 <#3> Filesystem::isDescendant(NULL, string) called at [<phorge>/src/view/widget/AphrontStackTraceView.php:33]
  #7 <#3> AphrontStackTraceView::render() called at [<phorge>/src/view/AphrontView.php:222]
  #8 <#3> AphrontView::producePhutilSafeHTML() called at [<phorge>/src/infrastructure/markup/render.php:115]
  #9 <#3> phutil_escape_html(AphrontStackTraceView) called at [<phorge>/src/infrastructure/markup/render.php:139]
  #10 <#3> phutil_escape_html(array) called at [<phorge>/src/infrastructure/markup/render.php:97]
  #11 <#3> phutil_tag(string, array, array) called at [<phorge>/src/aphront/handler/PhabricatorDefaultRequestExceptionHandler.php:62]
  #12 <#3> PhabricatorDefaultRequestExceptionHandler::handleRequestThrowable(AphrontRequest, RuntimeException) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:751]
  #13 <#3> AphrontApplicationConfiguration::handleThrowable(RuntimeException) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:296]
  #14 <#2> AphrontApplicationConfiguration::processRequest(AphrontRequest, PhutilDeferredLog, AphrontPHPHTTPSink, MultimeterControl) called at [<phorge>/src/aphront/configuration/AphrontApplicationConfiguration.php:203]
  #15 <#2> AphrontApplicationConfiguration::runHTTPRequest(AphrontPHPHTTPSink) called at [<phorge>/webroot/index.php:35]
  #16 phlog(PhutilAggregateException) called at [<phorge>/src/aphront/response/AphrontUnhandledExceptionResponse.php:32]
  #17 AphrontUnhandledExceptionResponse::setException(PhutilAggregateException) called at [<phorge>/webroot/index.php:46]