[Webkit-unassigned] [Bug 242235] [iOS 15.3+] Crash at -[UIViewController presentViewController:withAnimationController:completion:], called on a wrong thread

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=242235

Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ap at webkit.org,
                   |                            |cdumez at apple.com,
                   |                            |eric.carlson at apple.com,
                   |                            |jer.noble at apple.com,
                   |                            |wenson_hsieh at apple.com
            Summary|[iOS 15.3+]Crash at         |[iOS 15.3+] Crash at
                   |-[UIViewController          |-[UIViewController
                   |presentViewController:withA |presentViewController:withA
                   |nimationController:completi |nimationController:completi
                   |on:]                        |on:], called on a wrong
                   |                            |thread

--- Comment #2 from Alexey Proskuryakov <ap at webkit.org> ---
There is an assertion in -[_UISimpleFenceProvider trackSystemAnimationFence:] that says "main thread only", and we are clearly calling it on WebThread.

And this seems like a weird mix of WebKit and WebKitLegacy code?

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