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This is a backport PR for branch 42-x-y
codebytere

#53042: fix: illegal access errors when a same-process child window or subframe closes

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codebytere
Created: Aug 20, 2026, 5:50:10 AM
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Target: 42-x-y

Backport of #52964

See that PR for details. Trop could not cherry-pick it cleanly; this branch predates kNoBrowserGlobals, so the save-Blink-fetch blocks stay and there is no WasmResponseExtensions re-install to move, plus the same utility-process context conflict as 43/44.

Notes: Fixed Uncaught illegal access errors and possible renderer crashes after closing a same-process child window or removing an iframe with nodeIntegrationInSubFrames enabled.

Backport Information

Backported from

#52964: fix: illegal access errors when a same-process child window or subframe closes
Original PR Author
codebytere
Original PR Status
Merged
Original PR Merged At
Aug 20, 2026, 3:19:00 AM
Original PR Link
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