test(webkit): DO NOT MERGE - webkit GC leak matrix on macos-15-xlarge - #42680
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Yury Semikhatsky (yury-s) wants to merge 3 commits into
Draft
test(webkit): DO NOT MERGE - webkit GC leak matrix on macos-15-xlarge#42680Yury Semikhatsky (yury-s) wants to merge 3 commits into
Yury Semikhatsky (yury-s) wants to merge 3 commits into
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Diagnostic branch. Runs page-leaks plus a per-operation variant matrix on the one bot that reproduces the r2359 GC regression, to determine whether the failure really is confined to the expect path. All other workflows are removed on this branch so the draft PR runs nothing else.
First run showed waitFor failing 10/10 here while page-leaks' own waitFor test passed 10/10 on the same bot. The tests differ only in that the expect test registers WeakRefs before the loop as well as after, and every variant here copies that shape. These two controls drop the pre-loop registration to confirm it is a necessary ingredient rather than the assertion path.
Resolves the modify/delete conflict that blocked CI: a conflicting PR has no merge ref, so GitHub skipped the pull_request workflow entirely and the second commit never ran. Only the 8 workflows that can fire on a pull_request stay deleted. The other 13 are restored - they trigger on issues, schedule, workflow_dispatch, workflow_call, workflow_run, or push to release-*, none of which a PR can reach - which shrinks the conflict surface from 21 files to 8.
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Summary
Diagnostic only — do not merge. Pushed to get one signal off
macos-15-xlarge.page-leaks.spec.ts›expect should not leakhas failed ~70% of runs onwebkit-macos-15-xlargesince2dec18d7e(roll to WebKit r2359), while the click/fill/waitFor tests beside it are 0/88. This adds a variant matrix over the same scenario — one test per locator call, plus raw-DOM equivalents — to find out whether that asymmetry is real or a timing artifact.waitForequivalent, which does not fit the expect-specific story.