Assertion failure in WebCore::FrameLoader::stopLoading() running fast/events tests. The crash log blames fast/events/form-iframe-target-before-load-crash.html, but run-webkit-tests results blames fast/events/form-onchange.html. We likely need to run both tests sequentially to reproduce the assertion failure. Test run: <https://build.webkit.org/builders/Apple%20Yosemite%20Debug%20WK2%20%28Tests%29/builds/7913> Results: <https://build.webkit.org/results/Apple%20Yosemite%20Debug%20WK2%20(Tests)/r191652%20(7913)/results.html> Crash log: <https://build.webkit.org/results/Apple%20Yosemite%20Debug%20WK2%20(Tests)/r191652%20(7913)/fast/events/form-onchange-crash-log.txt> Stack trace for assertion failure: Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.JavaScriptCore 0x0000000113556867 WTFCrash + 39 1 com.apple.WebCore 0x00000001159e438d WebCore::FrameLoader::stopLoading(WebCore::UnloadEventPolicy) + 829 (FrameLoader.cpp:445) 2 com.apple.WebCore 0x00000001159e4a86 WebCore::FrameLoader::closeURL() + 214 (FrameLoader.cpp:536) 3 com.apple.WebCore 0x00000001159ef4a5 WebCore::FrameLoader::detachFromParent() + 53 (FrameLoader.cpp:2503) 4 com.apple.WebKit 0x000000010ff63412 WebKit::WebPage::close() + 3378 (WebPage.cpp:996) 5 com.apple.WebKit 0x000000010ffdaa53 void IPC::callMemberFunctionImpl<WebKit::WebPage, void (WebKit::WebPage::*)(), std::__1::tuple<> >(WebKit::WebPage*, void (WebKit::WebPage::*)(), std::__1::tuple<>&&, std::index_sequence<>) + 131 (HandleMessage.h:17) 6 com.apple.WebKit 0x000000010ffda9c8 void IPC::callMemberFunction<WebKit::WebPage, void (WebKit::WebPage::*)(), std::__1::tuple<>, std::make_index_sequence<0ul> >(std::__1::tuple<>&&, WebKit::WebPage*, void (WebKit::WebPage::*)()) + 88 (HandleMessage.h:23) 7 com.apple.WebKit 0x000000010ffd1f9a void IPC::handleMessage<Messages::WebPage::Close, WebKit::WebPage, void (WebKit::WebPage::*)()>(IPC::MessageDecoder&, WebKit::WebPage*, void (WebKit::WebPage::*)()) + 186 (HandleMessage.h:93) 8 com.apple.WebKit 0x000000010ffca224 WebKit::WebPage::didReceiveWebPageMessage(IPC::Connection&, IPC::MessageDecoder&) + 7604 (WebPageMessageReceiver.cpp:674) 9 com.apple.WebKit 0x000000010ff6c140 WebKit::WebPage::didReceiveMessage(IPC::Connection&, IPC::MessageDecoder&) + 384 (WebPage.cpp:3615) 10 com.apple.WebKit 0x000000010ff6c187 non-virtual thunk to WebKit::WebPage::didReceiveMessage(IPC::Connection&, IPC::MessageDecoder&) + 55 (WebPage.cpp:3615) 11 com.apple.WebKit 0x000000010f9ac9fd IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&, IPC::MessageDecoder&) + 461 (MessageReceiverMap.cpp:103) 12 com.apple.WebKit 0x00000001100ef22d WebKit::WebProcess::didReceiveMessage(IPC::Connection&, IPC::MessageDecoder&) + 61 (WebProcess.cpp:619) 13 com.apple.WebKit 0x000000010f861bf3 IPC::Connection::dispatchMessage(IPC::MessageDecoder&) + 51 (Connection.cpp:901) 14 com.apple.WebKit 0x000000010f858e2e IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::MessageDecoder, std::__1::default_delete<IPC::MessageDecoder> >) + 782 (Connection.cpp:933) 15 com.apple.WebKit 0x000000010f8621ef IPC::Connection::dispatchOneMessage() + 1519 (Connection.cpp:962) 16 com.apple.WebKit 0x000000010f863a6d IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::MessageDecoder, std::__1::default_delete<IPC::MessageDecoder> >)::$_10::operator()() const + 29 (Connection.cpp:895) 17 com.apple.WebKit 0x000000010f863a3c std::__1::__function::__func<IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::MessageDecoder, std::__1::default_delete<IPC::MessageDecoder> >)::$_10, std::__1::allocator<IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::MessageDecoder, std::__1::default_delete<IPC::MessageDecoder> >)::$_10>, void ()>::operator()() + 60 (functional:1370) 18 com.apple.JavaScriptCore 0x0000000112fe173a std::__1::function<void ()>::operator()() const + 26 19 com.apple.JavaScriptCore 0x000000011359ef38 WTF::RunLoop::performWork() + 648 20 com.apple.JavaScriptCore 0x000000011359f564 WTF::RunLoop::performWork(void*) + 36 21 com.apple.CoreFoundation 0x00007fff86770a01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 22 com.apple.CoreFoundation 0x00007fff86762b8d __CFRunLoopDoSources0 + 269 23 com.apple.CoreFoundation 0x00007fff867621bf __CFRunLoopRun + 927 24 com.apple.CoreFoundation 0x00007fff86761bd8 CFRunLoopRunSpecific + 296 25 com.apple.HIToolbox 0x00007fff8835c56f RunCurrentEventLoopInMode + 235 26 com.apple.HIToolbox 0x00007fff8835c2ea ReceiveNextEventCommon + 431 27 com.apple.HIToolbox 0x00007fff8835c12b _BlockUntilNextEventMatchingListInModeWithFilter + 71 28 com.apple.AppKit 0x00007fff8d6c38ab _DPSNextEvent + 978 29 com.apple.AppKit 0x00007fff8d6c2e58 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346 30 com.apple.AppKit 0x00007fff8d6b8af3 -[NSApplication run] + 594 31 com.apple.AppKit 0x00007fff8d635244 NSApplicationMain + 1832 32 libxpc.dylib 0x00007fff945e5928 _xpc_objc_main + 793 33 libxpc.dylib 0x00007fff945e7030 xpc_main + 490 34 com.apple.WebKit.WebContent.Development 0x000000010a6ecbe1 main + 785 (XPCServiceMain.Development.mm:187) 35 libdyld.dylib 0x00007fff923a05c9 start + 1
<rdar://problem/23294110>
The Flakiness Dashboard says this may have started with WebKit trunk r191652: <http://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Fevents%2Fform-onchange.html> <https://trac.webkit.org/changeset/191652>
The assertion seems to be: ASSERT(timing.navigationStart());
Created attachment 264229 [details] Patch
Comment on attachment 264229 [details] Patch Clearing flags on attachment: 264229 Committed r191688: <http://trac.webkit.org/changeset/191688>
All reviewed patches have been landed. Closing bug.