imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-049.html Is a flaky crash on Catalina wk2 Debug, Catalina gpurocess Debug, and iOS 15 Debug. The test is also showing up on macOS-AppleSilicon-Big-Sur-Debug-WK2-Tests-EWS. History: https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-contain%2Fcontent-visibility%2Fcontent-visibility-049.html Result page: https://build.webkit.org/results/Apple-Catalina-Debug-WK2-Tests/r284150%20(16826)/results.html Stderr: ASSERTION FAILED: other.underlyingStringIsValid() /Volumes/Data/worker/catalina-debug/build/WebKitBuild/Debug/usr/local/include/wtf/text/StringView.h(288) : WTF::StringView::StringView(const WTF::StringView &) 1 0x8280ecdd9 WTFCrash 2 0x803a29b7b WTFCrashWithInfo(int, char const*, char const*, int) 3 0x803ada03b WTF::StringView::StringView(WTF::StringView const&) 4 0x803ad9a4d WTF::StringView::StringView(WTF::StringView const&) 5 0x807dec0e6 WebCore::FragmentDirectiveParser::fragmentDirective() const 6 0x807debe9d WebCore::FrameView::scrollToFragment(WTF::URL const&) 7 0x807b6bcb9 WebCore::FrameLoader::scrollToFragmentWithParentBoundary(WTF::URL const&, bool) 8 0x807b69f8e WebCore::FrameLoader::finishedParsing() 9 0x807b69918 WebCore::FrameLoader::stopLoading(WebCore::UnloadEventPolicy) 10 0x807b6a149 WebCore::FrameLoader::closeURL() 11 0x807b7dd69 WebCore::FrameLoader::detachFromParent() 12 0x7f24e1b8e WebKit::WebPage::close() 13 0x7f259cc94 void IPC::callMemberFunctionImpl<WebKit::WebPage, void (WebKit::WebPage::*)(), std::__1::tuple<> >(WebKit::WebPage*, void (WebKit::WebPage::*)(), std::__1::tuple<>&&, std::__1::integer_sequence<unsigned long>) 14 0x7f259cba0 void IPC::callMemberFunction<WebKit::WebPage, void (WebKit::WebPage::*)(), std::__1::tuple<>, std::__1::integer_sequence<unsigned long> >(std::__1::tuple<>&&, WebKit::WebPage*, void (WebKit::WebPage::*)()) 15 0x7f255ee00 void IPC::handleMessage<Messages::WebPage::Close, WebKit::WebPage, void (WebKit::WebPage::*)()>(IPC::Connection&, IPC::Decoder&, WebKit::WebPage*, void (WebKit::WebPage::*)()) 16 0x7f2553c2a WebKit::WebPage::didReceiveWebPageMessage(IPC::Connection&, IPC::Decoder&) 17 0x7f24f3aee WebKit::WebPage::didReceiveMessage(IPC::Connection&, IPC::Decoder&) 18 0x7f05f0ed5 IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&, IPC::Decoder&) 19 0x7f1dca707 WebKit::WebProcess::didReceiveMessage(IPC::Connection&, IPC::Decoder&) 20 0x7f0095714 IPC::Connection::dispatchMessage(IPC::Decoder&) 21 0x7f0095eff IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) 22 0x7f0096530 IPC::Connection::dispatchOneIncomingMessage() 23 0x7f00b8008 IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_12::operator()() 24 0x7f00b7efe WTF::Detail::CallableWrapper<IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_12, void>::call() 25 0x82811a9f2 WTF::Function<void ()>::operator()() const 26 0x8281a6200 WTF::RunLoop::performWork() 27 0x8281aab81 WTF::RunLoop::performWork(void*) 28 0x7fff38e45d52 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ 29 0x7fff38e45cf1 __CFRunLoopDoSource0 30 0x7fff38e45b0b __CFRunLoopDoSources0 31 0x7fff38e4483a __CFRunLoopRun com.apple.WebKit.WebContent.Development terminated (pid 42754) because the process crashed LEAK: 3 WebPageProxy
Created attachment 441244 [details] Crash log
<rdar://problem/84265525>
Marked test expectations https://trac.webkit.org/changeset/284181/webkit
I was not able to reproduce the failure locally on BigSur using run-webkit-tests imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-049.html --debug --force -f --iterations 50 --exit-after-n-crashes-or-timeouts 1. I will try to see if I can reproduce on Catalina. According to the history, it looks like the test started flaky recently.
WebCore::FragmentDirectiveParser::fragmentDirective() is new, added with https://trac.webkit.org/changeset/284143/webkit
Reverted the expectation change in https://trac.webkit.org/changeset/284328/webkit Reverted the root cause in https://trac.webkit.org/changeset/284326/webkit I wasn't able to repro locally either, so I didn't manage to fix this.
(In reply to Tim Horton from comment #6) > Reverted the expectation change in > https://trac.webkit.org/changeset/284328/webkit > Reverted the root cause in https://trac.webkit.org/changeset/284326/webkit > I wasn't able to repro locally either, so I didn't manage to fix this. I commented on the original patch to explain why this is happening.
(In reply to Chris Dumez from comment #7) > (In reply to Tim Horton from comment #6) > > Reverted the expectation change in > > https://trac.webkit.org/changeset/284328/webkit > > Reverted the root cause in https://trac.webkit.org/changeset/284326/webkit > > I wasn't able to repro locally either, so I didn't manage to fix this. > > I commented on the original patch to explain why this is happening. Thank you!