Bug 271348

Summary: REGRESSION (UI-side compositing?): Sporadic failures in layout tests due to wrong test images
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: Tools / TestsAssignee: Simon Fraser (smfr) <simon.fraser>
Status: REOPENED ---    
Severity: Normal CC: commit-queue, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on: 271720    
Bug Blocks:    

Description Simon Fraser (smfr) 2024-03-20 16:54:09 PDT 
When running layout tests locally on Sonoma on an AS Mac, I can reliably reproduce an issue where some ref tests fail because the test snapshot image is wrong; it is an image of the previous test. I can reproduce this when just running LayoutTests/compositing.

It does not always affect the same test.
Comment 1 Simon Fraser (smfr) 2024-03-20 16:54:24 PDT 
<rdar://120050275>
Comment 2 Simon Fraser (smfr) 2024-03-20 17:02:11 PDT 
Pull request: https://github.com/WebKit/WebKit/pull/26214
Comment 3 EWS 2024-03-21 14:11:26 PDT 
Committed 276494@main (b289d5f2461d): <https://commits.webkit.org/276494@main>

Reviewed commits have been landed. Closing PR #26214 and removing active labels.
Comment 4 WebKit Commit Bot 2024-03-26 12:47:42 PDT 
Re-opened since this is blocked by bug 271720