RESOLVED FIXED297194
[JSC] Fix duplicate `iterator.next` property access in `Set#union` 
https://bugs.webkit.org/show_bug.cgi?id=297194
Summary [JSC] Fix duplicate `iterator.next` property access in `Set#union`
Sosuke Suzuki
Reported 2025-08-10 08:30:05 PDT
`Set#union` C++ implementation added by https://commits.webkit.org/298316@main was accessing `iterator.next` twice instead of once, causing test262 failures[1]. This patch fixes by using `iteratorDirect` with `forEachInIterationRecord` to access the property only once. [1]: https://build.webkit.org/#/builders/1232/builds/9714
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Sosuke Suzuki
Comment 1 2025-08-10 08:32:36 PDT
Pull request: https://github.com/WebKit/WebKit/pull/49198
EWS
Comment 2 2025-08-10 10:51:30 PDT
Committed 298486@main (a56c848d924c): <https://commits.webkit.org/298486@main> Reviewed commits have been landed. Closing PR #49198 and removing active labels.
Radar WebKit Bug Importer
Comment 3 2025-08-10 10:52:12 PDT
<rdar://problem/157986659>
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