EXCEPTION (Exception): Unable to hold lock in external process! #0 /Users/epriestley/dev/core/lib/arcanist/src/filesystem/__tests__/PhutilFileLockTestCase.php(51): PhutilFileLockTestCase->holdLock(Object(TempFile)) #1 /Users/epriestley/dev/core/lib/arcanist/src/unit/engine/phutil/PhutilTestCase.php(492): PhutilFileLockTestCase->testInProcessHolding() #2 /Users/epriestley/dev/core/lib/arcanist/src/unit/engine/PhutilUnitTestEngine.php(69): PhutilTestCase->run() #3 /Users/epriestley/dev/core/lib/arcanist/src/unit/engine/ArcanistConfigurationDrivenUnitTestEngine.php(148): PhutilUnitTestEngine->run() #4 /Users/epriestley/dev/core/lib/arcanist/src/workflow/ArcanistUnitWorkflow.php(170): ArcanistConfigurationDrivenUnitTestEngine->run() #5 /Users/epriestley/dev/core/lib/arcanist/src/workflow/ArcanistDiffWorkflow.php(1324): ArcanistUnitWorkflow->run() #6 /Users/epriestley/dev/core/lib/arcanist/src/workflow/ArcanistDiffWorkflow.php(1212): ArcanistDiffWorkflow->runUnit() #7 /Users/epriestley/dev/core/lib/arcanist/src/workflow/ArcanistDiffWorkflow.php(483): ArcanistDiffWorkflow->runLintUnit() #8 /Users/epriestley/dev/core/lib/arcanist/scripts/arcanist.php(393): ArcanistDiffWorkflow->run() #9 {main}