Filed by: nerli [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=267352277&repo=mozilla-central
Full log: https://queue.taskcluster.net/v1/task/G3zz_AUoQWyiB70HoxIwIw/runs/0/artifacts/public/logs/live_backing.log
Reftest URL: https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://queue.taskcluster.net/v1/task/G3zz_AUoQWyiB70HoxIwIw/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

[task 2019-09-18T23:43:02.418Z] 23:43:02 INFO - TEST-START | browser/components/urlbar/tests/browser/browser_urlbar_resultSpan.js
[task 2019-09-18T23:43:47.544Z] 23:43:47 INFO - TEST-INFO | started process screentopng
[task 2019-09-18T23:43:47.927Z] 23:43:47 INFO - TEST-INFO | screentopng: exit 0
[task 2019-09-18T23:43:47.928Z] 23:43:47 INFO - Buffered messages logged at 23:43:02
[task 2019-09-18T23:43:47.929Z] 23:43:47 INFO - Entering test bound oneTip
[task 2019-09-18T23:43:47.930Z] 23:43:47 INFO - TEST-PASS | browser/components/urlbar/tests/browser/browser_urlbar_resultSpan.js | Tip provider was invoked - true == true -
[task 2019-09-18T23:43:47.931Z] 23:43:47 INFO - Buffered messages finished
[task 2019-09-18T23:43:47.931Z] 23:43:47 INFO - TEST-UNEXPECTED-FAIL | browser/components/urlbar/tests/browser/browser_urlbar_resultSpan.js | Test timed out -
[task 2019-09-18T23:43:47.932Z] 23:43:47 INFO - GECKO(7091) | MEMORY STAT vsizeMaxContiguous not supported in this build configuration.
[task 2019-09-18T23:43:47.933Z] 23:43:47 INFO - GECKO(7091) | MEMORY STAT | vsize 2914MB | residentFast 290MB | heapAllocated 106MB
[task 2019-09-18T23:43:47.934Z] 23:43:47 INFO - TEST-OK | browser/components/urlbar/tests/browser/browser_urlbar_resultSpan.js | took 45132ms
[task 2019-09-18T23:43:47.934Z] 23:43:47 INFO - checking window state
[task 2019-09-18T23:43:48.975Z] 23:43:48 INFO - GECKO(7091) | Completed ShutdownLeaks collections in process 7255
[task 2019-09-18T23:43:49.019Z] 23:43:49 INFO - GECKO(7091) | Completed ShutdownLeaks collections in process 7224
[task 2019-09-18T23:43:49.020Z] 23:43:49 INFO - GECKO(7091) | Completed ShutdownLeaks collections in process 7143
[task 2019-09-18T23:43:49.056Z] 23:43:49 INFO - GECKO(7091) | Completed ShutdownLeaks collections in process 7166
[task 2019-09-18T23:43:49.278Z] 23:43:49 INFO - GECKO(7091) | Completed ShutdownLeaks collections in process 7091
[task 2019-09-18T23:43:49.278Z] 23:43:49 INFO - TEST-START | Shutdown

The logs indicate that this test timed out at the very first await statement. I mistakenly used the wrong kind of promise when creating this test, so this patch fixes that. I'm not entirely sure it'll resolve this intermittent, but at the very least its an improvement to the test.

https://hg.mozilla.org/mozilla-central/rev/354b6f2df231