EXCEPTION (Exception): Unable to hold lock in external process! #0 /core/data/drydock/workingcopy-80/repo/arcanist/src/filesystem/__tests__/PhutilFileLockTestCase.php(20): PhutilFileLockTestCase->holdLock(Object(TempFile)) #1 [internal function]: PhutilFileLockTestCase->testLockHolding() #2 /core/data/drydock/workingcopy-80/repo/arcanist/src/unit/engine/phutil/PhutilTestCase.php(492): call_user_func_array(Array, Array) #3 /core/data/drydock/workingcopy-80/repo/arcanist/src/unit/engine/PhutilUnitTestEngine.php(69): PhutilTestCase->run() #4 /core/data/drydock/workingcopy-80/repo/arcanist/src/unit/engine/ArcanistConfigurationDrivenUnitTestEngine.php(148): PhutilUnitTestEngine->run() #5 /core/data/drydock/workingcopy-80/repo/arcanist/src/workflow/ArcanistUnitWorkflow.php(170): ArcanistConfigurationDrivenUnitTestEngine->run() #6 /core/data/drydock/workingcopy-80/repo/arcanist/scripts/arcanist.php(393): ArcanistUnitWorkflow->run() #7 {main}