[Webkit-unassigned] [Bug 223838] Crash under FrameDestructionObserver::frame() on a GC thread

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=223838

--- Comment #1 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
Created attachment 424443

  --> https://bugs.webkit.org/attachment.cgi?id=424443&action=review

Crash log

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