As reported by @ton:
Encountered a PHP 8.1 error from https://we.phorge.it/T15351#8287
Reported here:
$ arc look remotes <!> Arcventure You follow a wide, straight path to the north and arrive in a grove of fruit trees after a few minutes of walking. The grass underfoot is thick and small insects flit through the air. At the far edge of the grove, you see remotes: [2023-05-08 00:46:54] EXCEPTION: (RuntimeException) strlen(): Passing null to parameter #1 ($string) of type string is deprecated at [<arcanist>/src/error/PhutilErrorHandler.php:261] arcanist(head=master, ref.master=d47289622650) #0 PhutilErrorHandler::handleError(integer, string, string, integer) called at [<arcanist>/src/utils/PhutilUTF8StringTruncator.php:90] #1 PhutilUTF8StringTruncator::truncateString(NULL) called at [<arcanist>/src/ref/ArcanistRefView.php:103] #2 ArcanistRefView::newLines(integer) called at [<arcanist>/src/ref/ArcanistRefView.php:66] #3 ArcanistRefView::newTerminalString() called at [<arcanist>/src/xsprintf/PhutilTerminalString.php:36] #4 PhutilTerminalString::escapeStringValue(ArcanistRefView, boolean) called at [<arcanist>/src/xsprintf/tsprintf.php:31] #5 xsprintf_terminal(NULL, string, integer, ArcanistRefView, integer) called at [<arcanist>/src/xsprintf/xsprintf.php:82] #6 xsprintf(string, NULL, array) called at [<arcanist>/src/xsprintf/tsprintf.php:19] #7 tsprintf(string, ArcanistRefView) called at [<arcanist>/src/workflow/ArcanistLookWorkflow.php:200] #8 ArcanistLookWorkflow::lookRemotes() called at [<arcanist>/src/workflow/ArcanistLookWorkflow.php:41] #9 ArcanistLookWorkflow::runWorkflow(PhutilArgumentParser) called at [<arcanist>/src/workflow/ArcanistWorkflow.php:227] #10 ArcanistWorkflow::executeWorkflow(PhutilArgumentParser) called at [<arcanist>/src/toolset/ArcanistPhutilWorkflow.php:21] #11 ArcanistPhutilWorkflow::execute(PhutilArgumentParser) called at [<arcanist>/src/parser/argument/PhutilArgumentParser.php:492] #12 PhutilArgumentParser::parseWorkflowsFull(array) called at [<arcanist>/src/runtime/ArcanistRuntime.php:171] #13 ArcanistRuntime::executeCore(array) called at [<arcanist>/src/runtime/ArcanistRuntime.php:37] #14 ArcanistRuntime::execute(array) called at [<arcanist>/support/init/init-arcanist.php:6] #15 require_once(string) called at [<arcanist>/bin/arc:10]