RESOLVED FIXED307109
[grid-lanes] Fix masonry track sizing to properly handle subgrid children's intrinsic contributions 
https://bugs.webkit.org/show_bug.cgi?id=307109
Summary [grid-lanes] Fix masonry track sizing to properly handle subgrid children's ...
Brandon
Reported 2026-02-05 14:52:03 PST
Rewrite computeDefiniteAndIndefiniteItemsForMasonry() to use the same stack-based traversal as aggregateGridItemsForIntrinsicSizing(), so that subgrid children's contributions flow through to the correct parent tracks. The previous GridIterator-based approach did not walk into subgrids, causing their children's intrinsic sizes to be ignored during masonry track sizing.
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Radar WebKit Bug Importer
Comment 1 2026-02-05 14:52:11 PST
<rdar://problem/169743714>
Brandon
Comment 2 2026-02-05 14:53:06 PST
Pull request: https://github.com/WebKit/WebKit/pull/58000
EWS
Comment 3 2026-02-11 09:18:28 PST
Committed 307260@main (f435986450ce): <https://commits.webkit.org/307260@main> Reviewed commits have been landed. Closing PR #58000 and removing active labels.
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