RESOLVED FIXED287450
[Site Isolation] Main frame navigation to a site loaded in a child frame should not reuse message receivers 
https://bugs.webkit.org/show_bug.cgi?id=287450
Summary [Site Isolation] Main frame navigation to a site loaded in a child frame shou...
Charlie Wolfe
Reported 2025-02-10 17:58:05 PST
Currently, if the main frame navigates to a site that is already loaded in a child frame, ProvisionalPageProxy reuses the remote page’s message receiver and page identifier. This cannot work when we need to cache the iframe’s page that is being navigated away from. Reusing the message receiver and page’s main frame is only necessary when a new window is opened, so we should restrict this behavior to that case.
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Radar WebKit Bug Importer
Comment 1 2025-02-10 17:58:17 PST
<rdar://problem/144577663>
Charlie Wolfe
Comment 2 2025-02-10 18:00:46 PST
Pull request: https://github.com/WebKit/WebKit/pull/40384
EWS
Comment 3 2025-02-11 10:29:01 PST
Committed 290219@main (cbe8887ec479): <https://commits.webkit.org/290219@main> Reviewed commits have been landed. Closing PR #40384 and removing active labels.
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