Intermittent text/color-opacity-rtl-1.html == text/color-opacity-rtl-1-ref.html | image comparison, max difference: 81, number of differing pixels: 49
Categories
(Core :: Layout: Text and Fonts, defect, P5)
Tracking
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People
(Reporter: intermittent-bug-filer, Unassigned)
References
Details
(Keywords: intermittent-failure, regression)
Filed by: apavel [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer.html#?job_id=269618948&repo=autoland
Full log: https://queue.taskcluster.net/v1/task/ZmW4UilrQK-vRttDNaeC6A/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/ZmW4UilrQK-vRttDNaeC6A/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1
[task 2019-10-03T15:25:09.754Z] 15:25:09 INFO - REFTEST TEST-START | file:///builds/worker/workspace/build/tests/reftest/tests/layout/reftests/text/color-opacity-rtl-1.html == file:///builds/worker/workspace/build/tests/reftest/tests/layout/reftests/text/color-opacity-rtl-1-ref.html
[task 2019-10-03T15:25:09.755Z] 15:25:09 INFO - REFTEST TEST-LOAD | file:///builds/worker/workspace/build/tests/reftest/tests/layout/reftests/text/color-opacity-rtl-1.html | 282 / 288 (97%)
[task 2019-10-03T15:25:09.802Z] 15:25:09 INFO - REFTEST TEST-LOAD | file:///builds/worker/workspace/build/tests/reftest/tests/layout/reftests/text/color-opacity-rtl-1-ref.html | 282 / 288 (97%)
[task 2019-10-03T15:25:09.960Z] 15:25:09 INFO - REFTEST TEST-UNEXPECTED-FAIL | file:///builds/worker/workspace/build/tests/reftest/tests/layout/reftests/text/color-opacity-rtl-1.html == file:///builds/worker/workspace/build/tests/reftest/tests/layout/reftests/text/color-opacity-rtl-1-ref.html | image comparison, max difference: 81, number of differing pixels: 49
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Comment 1•6 years ago
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[edit: deleting this comment, as it was an in-progress version of what became comment 2, which bugzilla preemptively posted as I was typing for some reason]
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Comment 2•6 years ago
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In both test failures here (color-opacity-rtl-1.html and color-opacity-rtl-2.html), it looks like there's a stacking-order difference between the testcase and reference case.
However, the real problem is that the glyphs are overlapping at all. It looks like we've ended up with the wrong glyph widths and we're positioning them on top of one another. (The stacking order difference is actually correct, I think, or at least reliable -- if I adjust the testcase locally to force overlap with e.g. letter-spacing:-10px, then I get a different stacking order between testcase + reference case.)
So I think this might be a case where we got the wrong glyph widths from the font, or something like that. Feels similar to bug 1585643.
| Comment hidden (Intermittent Failures Robot) |
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Comment 4•6 years ago
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https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup
For more information, please visit auto_nag documentation.
Description
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