Open Bug 1116972 Opened 6 years ago Updated 5 years ago

Intermittent Linux-32 reftest failures where data: URLs are string-equal but image comparison says they're not

Categories

(Testing :: Reftest, defect)

x86
Linux
defect
Not set
normal

Tracking

(Not tracked)

People

(Reporter: philor, Unassigned)

Details

(Keywords: intermittent-failure)

Attachments

(1 file)

Attached file reftest.log
660732 pixels seems like rather a lot to differ, particularly when you consider that the two images appear to be identical.

https://treeherder.mozilla.org/logviewer.html#?job_id=1573907&repo=fx-team

15:53:15 INFO - REFTEST TEST-START | file:///builds/slave/test/build/tests/reftest/tests/layout/reftests/svg/clipPath-and-transform-01.svg
15:53:15 INFO - REFTEST TEST-LOAD | file:///builds/slave/test/build/tests/reftest/tests/layout/reftests/svg/clipPath-and-transform-01.svg | 4047 / 5854 (69%)
15:53:15 INFO - ++DOMWINDOW == 55 (0x90235400) [pid = 3321] [serial = 11860] [outer = 0xa12bcc00]
15:53:16 INFO - REFTEST TEST-UNEXPECTED-FAIL | file:///builds/slave/test/build/tests/reftest/tests/layout/reftests/svg/clipPath-and-transform-01.svg | image comparison (==), max difference: 255, number of differing pixels: 660732
...
15:53:16 INFO - REFTEST INFO | Saved log: START file:///builds/slave/test/build/tests/reftest/tests/layout/reftests/svg/clipPath-and-transform-01.svg
15:53:16 INFO - REFTEST INFO | Saved log: [CONTENT] OnDocumentLoad triggering AfterOnLoadScripts
15:53:16 INFO - REFTEST INFO | Saved log: Initializing canvas snapshot
15:53:16 INFO - REFTEST INFO | Saved log: DoDrawWindow 0,0,800,1000
15:53:16 INFO - REFTEST INFO | Saved log: [CONTENT] RecordResult fired
15:53:16 INFO - REFTEST INFO | Saved log: RecordResult fired
15:53:16 INFO - REFTEST INFO | Saved log: RecordResult fired
15:53:16 INFO - REFTEST INFO | Loading a blank page
15:53:16 INFO - ++DOMWINDOW == 56 (0x902e6200) [pid = 3321] [serial = 11861] [outer = 0xa12bcc00]
15:53:16 INFO - REFTEST TEST-END | file:///builds/slave/test/build/tests/reftest/tests/layout/reftests/svg/clipPath-and-transform-01.svg
(In reply to TBPL Robot from comment #1)
> https://treeherder.mozilla.org/ui/logviewer.html#?repo=fx-team&job_id=1573907

The two data: URIs (for test and reference) string-compare as equal, which means there's something wrong with our diagnostics here...
And philor pointed out the same for the comment 2 logs prior to my comment 3.
Summary: Intermittent clipPath-and-transform-01.svg | image comparison (==), max difference: 255, number of differing pixels: 660732 → Intermittent Linux-32 reftest failures where data: URLs are string-equal but image comparison says they're not
Sort of a fun question, just how often we've filed intermittent failure bugs without looking at the lack of circled differences in the reftest analyzer, and then nobody has looked at the bug.
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