[Webkit-unassigned] [Bug 194871] Crash in DOMWindowExtension::suspendForPageCache

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=194871

--- Comment #2 from Ryosuke Niwa <rniwa at webkit.org> ---
I suspect what might be happening here is that DOMWindowExtension is getting removed / unregistered
inside the client delegate callbacks in dispatchWillDisconnectDOMWindowExtensionFromGlobalObject
and dispatchWillDestroyGlobalObjectForDOMWindowExtension.

In DOMWindow::willDestroyCachedFrame, for example, there is a comment about how this may happen:
// It is necessary to copy m_properties to a separate vector because the DOMWindowProperties may
// unregister themselves from the DOMWindow as a result of the call to willDestroyGlobalObjectInFrame.

I think what we didn't account is notifying one DOMWindowExtension removing another DOMWindowExtension.

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