Closed Bug 770072 Opened 8 years ago Closed 7 years ago

Intermittent TEST-UNEXPECTED-FAIL | layout/reftests/backgrounds/* | image comparison (==) off by one

Categories

(Core :: Layout, defect)

All
macOS
defect
Not set

Tracking

()

RESOLVED WORKSFORME

People

(Reporter: RyanVM, Unassigned)

References

Details

(Keywords: intermittent-failure)

I have no idea how bug 758034 managed to cause it, but since it landed, OSX opt builds are seeing a ~20% failure rate in the various background reftests. The common thread amongst all them is an off by one error on the left border of the test. I've spent all day running reftests and confirmed bug 758034 to be the cause. Backing out on Try also confirmed it:
https://tbpl.mozilla.org/?tree=Try&rev=ce7a86f38dee

Bill, we decided to leave your patches in for now, but please look in to this ASAP as it is a pretty frequent source of random orange on OSX.

Here's one example log (and more to be linked shortly).
https://tbpl.mozilla.org/php/getParsedLog.php?id=13149922&tree=Mozilla-Inbound&full=1
Status: NEW → RESOLVED
Closed: 7 years ago
Resolution: --- → WORKSFORME
Whiteboard: [orange]
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