Bug 244636

Description: media/modern-media-controls/pip-support/pip-support-click.html The test was added at 182031@main. The last modification to the test was at 221259@main. The first failure I saw on the viewable dashboard was at 243892@main, and the test has been a flaky crash since. REPRODUCTION STEPS I can reproduce this on <commit> but cannot reproduce it on <commit> or earlier. Command: run-webkit-tests --debug --root 254006@main-debug -1 --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --iterations 50 -f --no-retry media/modern-media-controls/pip-support/pip-support-click.html Result: Regressions: Unexpected crashes (1) media/modern-media-controls/pip-support/pip-support-click.html [ Crash ] History: https://results.webkit.org/?suite=layout-tests&test=media%2Fmodern-media-controls%2Fpip-support%2Fpip-support-click.html&platform=mac&flavor=wk1&style=debug&version_name=Monterey&limit=50000&recent=false Crash Log: Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.JavaScriptCore 0x11f7a072e WTFCrash 1 com.apple.JavaScriptCore 0x11f7c1b82 ReportBlockedObjCException(NSException*) 2 com.apple.WebKitLegacy 0x10d14a43c WebChromeClient::enterVideoFullscreenForVideoElement(WebCore::HTMLVideoElement&, unsigned int, bool) 3 com.apple.WebCore 0x12ba43796 WebCore::HTMLMediaElement::enterFullscreen(unsigned int)::$_42::operator()() const 4 com.apple.WebCore 0x12ba43558 WTF::Detail::CallableWrapper<WebCore::HTMLMediaElement::enterFullscreen(unsigned int)::$_42, void>::call() 5 com.apple.WebCore 0x12803e962 WTF::Function<void ()>::operator()() const 6 com.apple.WebCore 0x12ba1f0e8 void WebCore::ActiveDOMObject::queueTaskKeepingObjectAlive<WebCore::HTMLMediaElement>(WebCore::HTMLMediaElement&, WebCore::TaskSource, WTF::Function<void ()>&&)::'lambda'()::operator()() const 7 com.apple.WebCore 0x12ba1ee38 WTF::Detail::CallableWrapper<void WebCore::ActiveDOMObject::queueTaskKeepingObjectAlive<WebCore::HTMLMediaElement>(WebCore::HTMLMediaElement&, WebCore::TaskSource, WTF::Function<void ()>&&)::'lambda'(), void>::call() 8 com.apple.WebCore 0x12803e962 WTF::Function<void ()>::operator()() const 9 com.apple.WebCore 0x12b5f9c58 WebCore::EventLoopFunctionDispatchTask::execute() 10 com.apple.WebCore 0x12b5ec370 WebCore::EventLoop::run()