1414820 - Intermittent "reftest-stylo" w3c-css/submitted/masking/mask-image-1c.html == w3c-css/submitted/masking/mask-image-1c.html | image comparison, max difference: 255, number of differing pixels: 5000

Status: RESOLVED DUPLICATE of bug 1365177

(Core :: Layout, defect, P5)

Description

[Treeherder Bug Filer]

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

https://treeherder.mozilla.org/logviewer.html#?job_id=142394460&repo=autoland

https://queue.taskcluster.net/v1/task/R6IqqZJYR6aWamHxkxWGZQ/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/R6IqqZJYR6aWamHxkxWGZQ/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

Comment 1

[Daniel Holbert [:dholbert]]

This is really the same underlying issue as bug 1365177. In both cases, we're misrendering the testcase (painting it blank).

The only difference is that in this bug's report, we're using another rendering of the same file (which we happened to get right) as the reference case, for the "reftest-stylo" comparison.

But the underlying issue is the same -- we're occasionally rendering this testcase as blank.  Aryx, would it be OK/appropriate to dupe? I'm worried that with two bugs for the same filename, people will be more likely to mis-star and the reports will be split semi-inadvertantly & unnecessarily (given that it's the same underlying issue).

Comment 2

[Sebastian Hengst [:aryx] (needinfo me if it's about an intermittent or backout)]

Ok to dupe, thanks for letting me know.

Comment 3

[Daniel Holbert [:dholbert]]

Cool, I'll dupe then (and remove the "intermittent-failure" keyword in the hopes that that'll prevent this from showing up as a starring suggestion.)

Comment 4

[Intermittent Failures Robot]

11 failures in 849 pushes (0.013 failures/push) were associated with this bug in the last 7 days.    

Repository breakdown:
* autoland: 7
* mozilla-inbound: 3
* mozilla-central: 1

Platform breakdown:
* linux64: 11

For more details, see:
https://brasstacks.mozilla.com/orangefactor/?display=Bug&bugid=1414820&startday=2017-11-06&endday=2017-11-12&tree=all