311570 2026-04-06 10:31:00 -0700 NEW TEST(310248@main): [Mac Debug] ASSERTION FAILED: ScriptDisallowedScope::InMainThread::isScriptAllowed() in http/tests/site-isolation/nested-cross-origin-iframe.html 2026-04-06 10:54:58 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 darbinyan webkit-unassigned webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2197270 0 darbinyan 2026-04-06 10:31:00 -0700 http/tests/site-isolation/nested-cross-origin-iframe.html is a flaky crash with assertion on EWS bots across different PRs and also in post-commit bots. ASSERTION FAILED: ScriptDisallowedScope::InMainThread::isScriptAllowed() /Volumes/Data/worker/macOS-Tahoe-Debug-Build-EWS/build/Source/WebCore/loader/FrameLoader.cpp(967) : void WebCore::FrameLoader::checkCompleted() 1 0x3068ec534 WebCore::FrameLoader::checkCompleted() 2 0x3058b5898 WebCore::Document::checkCompleted() 3 0x306e439cc WebCore::RemoteFrame::didFinishLoadInAnotherProcess() 4 0x11b2b3dec WebKit::WebFrame::didFinishLoadInAnotherProcess() 5 0x11b31018c WebKit::WebPage::didFinishLoadInAnotherProcess(WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>) 6 0x118a70450 auto void IPC::callMemberFunction<WebKit::WebPage, WebKit::WebPage, void (WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>>>(WebKit::WebPage*, void (WebKit::WebPage::*)(WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>>&&)::'lambda'(auto&&...)::operator()<WTF::ObjectIdentifierGeneric<WebCore::FrameIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits<unsigned long long>, unsigned long long>>(auto&&...) const Test result: https://ews-build.webkit.org/#/builders/161/builds/22789 Test history: https://results.webkit.org/?suite=layout-tests&test=http%2Ftests%2Fsite-isolation%2Fnested-cross-origin-iframe.html&style=debug&platform=mac 2197271 1 webkit-bug-importer 2026-04-06 10:33:07 -0700 <rdar://problem/174171878> 2197279 2 ews-feeder 2026-04-06 10:54:58 -0700 Test gardening commit 310651@main (90398ba8412f): <https://commits.webkit.org/310651@main> Reviewed commits have been landed. Closing PR #62126 and removing active labels.