Bug 255383

Summary:	REGRESSION(262844@main): css3/filters/reference-filter-change-repaint.html is randomly failing
Product:	WebKit	Reporter:	Fujii Hironori <Hironori.Fujii>
Component:	CSS	Assignee:	Chris Dumez <cdumez>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	cdumez, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://bugs.webkit.org/show_bug.cgi?id=255258

Description Fujii Hironori 2023-04-12 20:42:06 PDT

REGRESSION: css3/filters/reference-filter-change-repaint.html is randomly failing

https://results.webkit.org/?suite=layout-tests&test=css3%2Ffilters%2Freference-filter-change-repaint.html

262845@main
Buildbot: builder Apple-Monterey-Release-AppleSilicon-WK2-Tests build 8683
https://build.webkit.org/#/builders/370/builds/8683
https://build.webkit.org/results/Apple-Monterey-Release-AppleSilicon-WK2-Tests/262845@main%20(8683)/results.html

--- /Volumes/Data/worker/Apple-Monterey-Release-AppleSilicon-WK2-Tests/build/layout-test-results/css3/filters/reference-filter-change-repaint-expected.txt
+++ /Volumes/Data/worker/Apple-Monterey-Release-AppleSilicon-WK2-Tests/build/layout-test-results/css3/filters/reference-filter-change-repaint-actual.txt
@@ -1,4 +1 @@
- (repaint rects
-  (rect 8 8 200 200)
-)

Comment 1 Fujii Hironori 2023-04-12 20:49:35 PDT

Caused by 262844@main (bug#255258)???

Comment 2 Fujii Hironori 2023-04-12 21:10:27 PDT

This is reproducible with WinCairo Debug on my PC.
I confirmed reverting 262844@main fixes the flaky failure.

Comment 3 Chris Dumez 2023-04-12 23:14:51 PDT

Ok, I can investigate tomorrow. Hopefully I'll be able to reproduce.
Thanks for the heads up.

Comment 4 Chris Dumez 2023-04-13 08:57:43 PDT

I can reproduce the flakiness locally. I am debugging.

Comment 5 Chris Dumez 2023-04-13 09:04:27 PDT

Pull request: https://github.com/WebKit/WebKit/pull/12699

Comment 6 EWS 2023-04-14 12:47:09 PDT

Committed 262985@main (2e76ca3e586a): <https://commits.webkit.org/262985@main>

Reviewed commits have been landed. Closing PR #12699 and removing active labels.

Comment 7 Radar WebKit Bug Importer 2023-04-14 12:48:16 PDT

<rdar://problem/108061699>