321823 2026-08-14 16:48:36 -0700 [macOS Debug] imported/w3c/web-platform-tests/fullscreen/model/move-to-fullscreen-iframe.html is a flaky crashing 2026-10-15 10:08:19 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED CONFIGURATION CHANGED InRadar P2 Normal --- 276855 1 darbinyan webkit-unassigned fred.wang webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2240491 0 darbinyan 2026-08-14 16:48:36 -0700 The following test is flaky crash on macOS Debug. imported/w3c/web-platform-tests/fullscreen/model/move-to-fullscreen-iframe.html /Volumes/Data/worker/macOS-Tahoe-Debug-Build-EWS/build/Source/WebKit/WebProcess/WebPage/WebPage.cpp(10656) : T WebKit::WebPage::contentsToRootView(WebCore::FrameIdentifier, T) [T = WebCore::FloatRect] 1 0x1201c64dc WebCore::FloatRect WebKit::WebPage::contentsToRootView<WebCore::FloatRect>(WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect) 2 0x1201c6348 WebKit::WebPage::contentsToRootViewRect(WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect, WTF::CompletionHandler<void (WebCore::FloatRect)>&&) 3 0x11d931564 auto void IPC::callMemberFunction<WebKit::WebPage, WebKit::WebPage, void (WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect, WTF::CompletionHandler<void (WebCore::FloatRect)>&&), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect>, void (WebCore::FloatRect)>(WebKit::WebPage*, void (WebKit::WebPage::*)(WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect, WTF::CompletionHandler<void (WebCore::FloatRect)>&&), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect>&&, WTF::CompletionHandler<void (WebCore::FloatRect)>&&)::'lambda'(auto&&...)::operator()<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect>(auto&&...) const 4 0x11d931440 std::__1::__invoke_result_impl<void, auto...>::type std::__1::__invoke[abi:sqn210106]<void IPC::callMemberFunction<WebKit::WebPage, WebKit::WebPage, void (WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect, WTF::CompletionHandler<void (WebCore::FloatRect)>&&), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect>, void (WebCore::FloatRect)>(WebKit::WebPage*, void (WebKit::WebPage::*)(WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect, WTF::CompletionHandler<void (WebCore::FloatRect)>&&), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect>&&, WTF::CompletionHandler<void (WebCore::FloatRect)>&&)::'lambda'(auto&&...), WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect>(auto&&...) 5 0x11d93140c decltype(auto) std::__1::__apply_tuple_impl[abi:sqn210106]<void IPC::callMemberFunction<WebKit::WebPage, WebKit::WebPage, void (WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect, WTF::CompletionHandler<void (WebCore::FloatRect)>&&), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect>, void (WebCore::FloatRect)>(WebKit::WebPage*, void (WebKit::WebPage::*)(WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect, WTF::CompletionHandler<void (WebCore::FloatRect)>&&), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect>&&, WTF::CompletionHandler<void (WebCore::FloatRect)>&&)::'lambda'(auto&&...), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>, WebCore::FloatRect>, 0ul, 1ul>(WebKit::WebPage&&, WebKit::WebPage&&, std::__1::__tuple_indices<0ul, 1ul>) Test results: https://ews-build.webkit.org/#/builders/161/builds/45809 Test history: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Ffullscreen%2Fmodel%2Fmove-to-fullscreen-iframe.html&style=debug 2240492 1 webkit-bug-importer 2026-08-14 16:48:52 -0700 <rdar://problem/184962474> 2240508 2 ews-feeder 2026-08-14 17:50:22 -0700 Test gardening commit 319211@main (20eba49ee7a8): <https://commits.webkit.org/319211@main> Reviewed commits have been landed. Closing PR #71677 and removing active labels. 2260098 3 fred.wang 2026-10-07 08:09:54 -0700 I'm not able to reproduce on macOS with Tools/Scripts/run-webkit-tests --debug --repeat 1000 imported/w3c/web-platform-tests/fullscreen/model/move-to-fullscreen-iframe.html Checking the test history, no crashes have been reported for more than one month. Before that, it was happening relatively Sep 5, Sep 4, Sep 3 (twice), Sep 1 (twice), Aug 25, Aug 24, Aug 22, Aug 21, Aug 20, Aug 17, Aug 15, Aug 12 (twice). So I would say the issue is fixed and we can remove the CRASH label. 2260100 4 fred.wang 2026-10-07 08:17:32 -0700 Test gardening pull request: https://github.com/WebKit/WebKit/pull/76192 2260133 5 ews-feeder 2026-10-07 09:04:04 -0700 Test gardening commit 322985@main (e85fb5ac846b): <https://commits.webkit.org/322985@main> Reviewed commits have been landed. Closing PR #76192 and removing active labels.