Bug 243962

Summary: REGRESSION(253327@main): [ iOS ] 2X imported/w3c/web-platform-tests/css/css-pseudo/(Layout Tests) are almost constant failures
Product: WebKit Reporter: Hercules Hjalmarsson <hhjalmarsson>
Component: New BugsAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: megan_gardner, thorton, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
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Description Hercules Hjalmarsson 2022-08-15 16:34:23 PDT 
Created attachment 461651 [details]
Diff Images

imported/w3c/web-platform-tests/css/css-pseudo/target-text-008.html
imported/w3c/web-platform-tests/css/css-pseudo/highlight-paired-cascade-005.html

Are two almost constant image failures on iOS ToT and since 253327@main.

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=imported/w3c/web-platform-tests/css/css-pseudo/target-text-008.html

Diff images attached.
Comment 1 Hercules Hjalmarsson 2022-08-15 16:34:44 PDT 
Created attachment 461652 [details]
Diff images
Comment 2 Radar WebKit Bug Importer 2022-08-15 16:36:34 PDT 
<rdar://problem/98693973>
Comment 3 Hercules Hjalmarsson 2022-08-15 16:38:48 PDT 
This issue can be bisected to 253327@main using command:

run-webkit-tests --ios-simulator --iterations=100 imported/w3c/web-platform-tests/css/css-pseudo/target-text-008.html

According to the history it appears both these tests started frequently failing on the queues at the same time since 253327@main.
Comment 4 Hercules Hjalmarsson 2022-08-15 16:40:16 PDT 
From the diff images it appears that these tests are not just rebaseline issues. Judging by the expected and actual output, it indicates actual failures.
Comment 5 Hercules Hjalmarsson 2022-08-15 16:44:01 PDT 
(In reply to Hercules Hjalmarsson from comment #3)
> This issue can be bisected to 253327@main using command:
> 
> run-webkit-tests --ios-simulator --iterations=100
> imported/w3c/web-platform-tests/css/css-pseudo/target-text-008.html
> 
> According to the history it appears both these tests started frequently
> failing on the queues at the same time since 253327@main.

It appears that some of these test failures can be more easily reproduced on iPad.
Comment 6 EWS 2022-08-15 16:55:25 PDT 
Test gardening commit 253446@main (d95feca639ce): <https://commits.webkit.org/253446@main>

Reviewed commits have been landed. Closing PR #3332 and removing active labels.
Comment 7 Richard Robinson 2022-11-01 17:36:37 PDT 
Pull request: https://github.com/WebKit/WebKit/pull/6018
Comment 8 EWS 2022-11-12 17:21:42 PST 
Committed 256615@main (82e61f0babb2): <https://commits.webkit.org/256615@main>

Reviewed commits have been landed. Closing PR #6018 and removing active labels.