Filed by: egao [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=254006300&repo=try
Full log: https://queue.taskcluster.net/v1/task/c0vO4lZRRQadLu3h6f0jNQ/runs/0/artifacts/public/logs/live_backing.log

Platform: macosx1014-mojave
Test: mochitest-browser-chrome

Context:

23:39:48 INFO - TEST-UNEXPECTED-FAIL | browser/base/content/test/performance/browser_startup_syncIPC.js | Unexpected sync IPC behavior during startup; open the profile_startup_syncIPC.json artifact in the Firefox Profiler to see what happened -
23:39:48 INFO - Stack trace:
23:39:48 INFO - chrome://mochikit/content/browser-test.js:test_ok:1313
23:39:48 INFO - chrome://mochitests/content/browser/browser/base/content/test/performance/browser_startup_syncIPC.js:null:313
23:39:48 INFO - chrome://mochikit/content/browser-test.js:Tester_execTest/<:1115
23:39:48 INFO - chrome://mochikit/content/browser-test.js:Tester_execTest:1143
23:39:48 INFO - chrome://mochikit/content/browser-test.js:nextTest/<:1004
23:39:48 INFO - chrome://mochikit/content/tests/SimpleTest/SimpleTest.js:SimpleTest.waitForFocus/waitForFocusInner/focusedOrLoaded/<:803
23:39:48 INFO - Leaving test bound
23:39:48 INFO - GECKO(1717) | JavaScript error: resource://testing-common/PromiseTestUtils.jsm, line 110: uncaught exception: Object
23:39:48 INFO - GECKO(1717) | MEMORY STAT | vsize 7136MB | residentFast 400MB | heapAllocated 182MB
23:39:48 INFO - TEST-OK | browser/base/content/test/performance/browser_startup_syncIPC.js | took 167ms
23:39:48 INFO - checking window state
23:39:48 INFO - Console message: [JavaScript Error: "uncaught exception: Object" {file: "resource://testing-common/PromiseTestUtils.jsm" line: 110}]
23:39:50 INFO - GECKO(1717) | Completed ShutdownLeaks collections in process 1723
23:39:50 INFO - GECKO(1717) | Completed ShutdownLeaks collections in process 1722
23:39:50 INFO - GECKO(1717) | Completed ShutdownLeaks collections in process 1719
23:39:50 INFO - GECKO(1717) | Completed ShutdownLeaks collections in process 1724
23:39:50 INFO - GECKO(1717) | Completed ShutdownLeaks collections in process 1726
23:39:50 INFO - GECKO(1717) | Completed ShutdownLeaks collections in process 1718
23:39:50 INFO - GECKO(1717) | Completed ShutdownLeaks collections in process 1721
23:39:50 INFO - GECKO(1717) | Completed ShutdownLeaks collections in process 1717

:dolske - I noted this failure on macosx1014 while greening up mochitest-browser-chrome. There also appears to be a similar failure at bug 1561940 that was filed yesterday; if these are related, please feel free to dupe them. Otherwise, could this failure be investigated, thanks.,

Test has been disabled on macosx1014 for mochitest-browser-chrome pending investigation, as it appears to be a permafail.

https://phabricator.services.mozilla.com/D38783

This appears to have been fixed by the work in either bug 1557221, bug 1561940, or both. The test is now re-enabled. I'm going to close this one out as fixed.