1400530 - Intermittent bidi/numeral/arabic-5.html == bidi/numeral/arabic-5-ref.html | image comparison, max difference: 80, number of differing pixels: 16

Status: RESOLVED INCOMPLETE

(Core :: Graphics, defect, P3)

Description

[Treeherder Bug Filer]

Filed by: archaeopteryx [at] coole-files.de

https://treeherder.mozilla.org/logviewer.html#?job_id=131444915&repo=autoland

https://queue.taskcluster.net/v1/task/PwIB85gVS7KuaJ8lcn3XDw/runs/0/artifacts/public/logs/live_backing.log

https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://queue.taskcluster.net/v1/task/PwIB85gVS7KuaJ8lcn3XDw/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

Comment 1

[Jonathan Kew [:jfkthame]]

This looks more like a Graphics failure than Layout:Text. The screenshot for bidi/numeral/arabic-5.html shows a gap in the bottom border of the missing-image, as though there's been an incomplete rasterization or layer-compositing operation. And other test failures on the same run show similar glitches.

The failure in reftests/bidi/bdi-element.html is a particularly wild one -- both test and reference have a lot of apparently-random fragments missing, but more of them in the test. And it looks like there is residue from an earlier testcase still present: see the remnants of a broken-image box behind the (broken) text "From WebKit bug 50913". That doesn't belong in this test at all.

Altogether, this seems like some fairly serious Graphics breakage: we shouldn't be seeing residue from a previous page mixed in with current content, and we shouldn't be missing random fragments from a screen update.

Comment 2

[Intermittent Failures Robot]

1 failures in 1032 pushes (0.001 failures/push) were associated with this bug in the last 7 days.    

Repository breakdown:
* autoland: 1

Platform breakdown:
* windows7-32: 1

For more details, see:
https://brasstacks.mozilla.com/orangefactor/?display=Bug&bugid=1400530&startday=2017-09-11&endday=2017-09-17&tree=all

Comment 3

[Intermittent Failures Robot]

1 failures in 824 pushes (0.001 failures/push) were associated with this bug in the last 7 days.    

Repository breakdown:
* mozilla-central: 1

Platform breakdown:
* windows7-32: 1

For more details, see:
https://brasstacks.mozilla.com/orangefactor/?display=Bug&bugid=1400530&startday=2017-10-02&endday=2017-10-08&tree=all

Comment 4

[Firefox Bug Husbandry Bot]

https://wiki.mozilla.org/Bugmasters#Intermittent_Test_Failure_Cleanup