[Webkit-unassigned] [Bug 234358] [iOS 15] Crash during WebProcessProxy::didClose while writing to NSUserDefaults on another thread

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=234358

Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
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--- Comment #4 from Alexey Proskuryakov <ap at webkit.org> ---
This offset in WebPageProxy::resetStateAfterProcessTermination corresponds to line 7951 in https://trac.webkit.org/browser/webkit/tags/Safari-612.2.9.0.20/Source/WebKit/UIProcess/WebPageProxy.cpp

        pageClient().processDidExit();

Tracing into what it could be calling, I don't see anything helpful (seems like it would be [CATransaction commit] in WebViewImpl::setAcceleratedCompositingRootLayer, based on omitted frames?.. But trying to guess execution flow based on missing frames is a long shot.

Can you say what key the Chrome thread is writing? Maybe that would help see who is observing it, and whether there is a refcounting bug.

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