Bug 311942

Summary: [Grid] Crash under GridTrackSizingAlgorithm::copyUsedTrackSizesForSubgrid when paint containment changes on subgrid
Product: WebKit Reporter: Sammy Gill <sgill26>
Component: Layout and RenderingAssignee: Sammy Gill <sgill26>
Status: RESOLVED FIXED    
Severity: Normal CC: bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://github.com/web-platform-tests/wpt/pull/59106
Attachments:
Description Flags
Testcase none

Sammy Gill
Reported 2026-04-10 09:47:59 PDT
Created attachment 478996 [details] Testcase The following test case triggers a RELEASE_ASSERT in GridTrackSizingAlgorithm::copyUsedTrackSizesForSubgrid.
Attachments
Testcase (437 bytes, text/html)
2026-04-10 09:47 PDT, Sammy Gill 		no flags
Details
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Sammy Gill
Comment 1 2026-04-10 09:48:22 PDT
rdar://172724120
Sammy Gill
Comment 2 2026-04-10 10:00:40 PDT
Pull request: https://github.com/WebKit/WebKit/pull/62421
Sammy Gill
Comment 3 2026-04-10 10:52:55 PDT
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/59106
EWS
Comment 4 2026-04-10 16:47:03 PDT
Committed 310968@main (2cc90f478c7e): <https://commits.webkit.org/310968@main> Reviewed commits have been landed. Closing PR #62421 and removing active labels.
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