1550729 - Perma contain-size-multicol-002-ref.html | image comparison, max difference: 255, number of differing pixels: 154334 when Gecko 68 merges to Beta on 2019-05-13

Status: VERIFIED FIXED

(Core :: Layout, defect, P3)

Description

[Oana Pop-Rus]

[Tracking Requested - why for this release]:

Central as beta simulation

Treeherder link: https://treeherder.mozilla.org/#/jobs?repo=try&resultStatus=testfailed%2Cbusted%2Cexception%2Cusercancel%2Crunnable&revision=44b99069e68dbf6c4b10d317479937cdc493593a&selectedJob=245734733

Failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=245734733&repo=try&lineNumber=1997

[task 2019-05-10T12:03:25.451Z] 12:03:25 INFO - REFTEST TEST-UNEXPECTED-FAIL | file:///builds/worker/workspace/build/tests/reftest/tests/layout/reftests/w3c-css/submitted/contain/contain-size-multicol-002.html == file:///builds/worker/workspace/build/tests/reftest/tests/layout/reftests/w3c-css/submitted/contain/contain-size-multicol-002-ref.html | image comparison, max difference: 255, number of differing pixels: 154334

This fails only on late beta.

Ting-Yu, can you please take a look at this?

Comment 1

[Ting-Yu Lin [:TYLin] (PST, UTC-8)]

Oh, I didn't aware that layout.css.contain.enabled is still disable on late beta and release. The two tests require the preference. I'll upload a patch to fix this.

Comment 2

[Ting-Yu Lin [:TYLin] (PST, UTC-8)]

Attachment: Bug 1550729 - Enable column-span pref for contain-size-multicol-{002,003}.html individually. r?dholbert

CSS containment is enabled on early beta or earlier. Using
"default-preferences" to flip column-span pref overrides CSS
containment's pref at the first line in the reftest.list, which make the
two test fail on late beta.

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/cb4e5f760968
Enable column-span pref for contain-size-multicol-{002,003}.html individually. r=dholbert

Comment 4

[Razvan Maries]

https://hg.mozilla.org/mozilla-central/rev/cb4e5f760968

Comment 5

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

Verified in latest central-as-late-beta simulation: https://treeherder.mozilla.org/#/jobs?repo=try&resultStatus=testfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel%2Crunnable&revision=eb4daa029c0ecb89db3104f9cba4d7fbdf05b575

Comment 6

[Intermittent Failures Robot]

7 failures in 4705 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• try: 7

Platform breakdown:

• windows7-32-shippable: 2
• linux32: 3
• linux32-shippable: 2

For more details, see:
https://treeherder.mozilla.org/intermittent-failures.html#/bugdetails?bug=1550729&startday=2019-05-06&endday=2019-05-12&tree=all