EXCEPTION (Exception): Can't parse an empty diff! #0 /core/data/drydock/workingcopy-90/repo/phabricator/src/infrastructure/diff/PhabricatorDifferenceEngine.php(143): ArcanistDiffParser->parseDiff('') #1 /core/data/drydock/workingcopy-90/repo/phabricator/src/applications/files/diff/PhabricatorDocumentEngineBlocks.php(80): PhabricatorDifferenceEngine->generateChangesetFromFileContent('?', '?') #2 /core/data/drydock/workingcopy-90/repo/phabricator/src/infrastructure/diff/prose/PhutilProseDifferenceEngine.php(225): PhabricatorDocumentEngineBlocks->newTwoUpLayout() #3 /core/data/drydock/workingcopy-90/repo/phabricator/src/infrastructure/diff/prose/PhutilProseDifferenceEngine.php(14): PhutilProseDifferenceEngine->newHashDiff(Array, Array) #4 /core/data/drydock/workingcopy-90/repo/phabricator/src/infrastructure/diff/prose/PhutilProseDifferenceEngine.php(6): PhutilProseDifferenceEngine->buildDiff('', '', 0) #5 /core/data/drydock/workingcopy-90/repo/phabricator/src/infrastructure/diff/prose/__tests__/PhutilProseDiffTestCase.php(242): PhutilProseDifferenceEngine->getDiff('', '') #6 /core/data/drydock/workingcopy-90/repo/phabricator/src/infrastructure/diff/prose/__tests__/PhutilProseDiffTestCase.php(44): PhutilProseDiffTestCase->assertProseParts('', '', Array, 'Empty') #7 [internal function]: PhutilProseDiffTestCase->testProseDiffsDistance() #8 /core/data/drydock/workingcopy-90/repo/arcanist/src/unit/engine/phutil/PhutilTestCase.php(493): call_user_func_array(Array, Array) #9 /core/data/drydock/workingcopy-90/repo/arcanist/src/unit/engine/PhutilUnitTestEngine.php(69): PhutilTestCase->run() #10 /core/data/drydock/workingcopy-90/repo/arcanist/src/unit/engine/ArcanistConfigurationDrivenUnitTestEngine.php(148): PhutilUnitTestEngine->run() #11 /core/data/drydock/workingcopy-90/repo/arcanist/src/workflow/ArcanistUnitWorkflow.php(170): ArcanistConfigurationDrivenUnitTestEngine->run() #12 /core/data/drydock/workingcopy-90/repo/arcanist/scripts/arcanist.php(419): ArcanistUnitWorkflow->run() #13 {main}