Bug 263175

Summary:	REGRESSION(267849@main): MESSAGE_CHECK() failure when mouse events are being handled during a process swap
Product:	WebKit	Reporter:	Charlie Wolfe <charliew>
Component:	WebKit Process Model	Assignee:	Charlie Wolfe <charliew>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Charlie Wolfe 2023-10-15 15:41:36 PDT

If an event is being handled by the web process during a process swap a message check in `WebPageProxy::didReceiveEvent()` will fail.

Comment 1 Charlie Wolfe 2023-10-15 15:42:00 PDT

rdar://116942710

Comment 2 Charlie Wolfe 2023-10-15 15:46:16 PDT

Pull request: https://github.com/WebKit/WebKit/pull/19099

Comment 3 EWS 2023-10-16 10:53:33 PDT

Committed 269366@main (0172e5a8bf88): <https://commits.webkit.org/269366@main>

Reviewed commits have been landed. Closing PR #19099 and removing active labels.