Bug 112326 – REGRESSION: Nightly builds crashes in ScriptDebugServer::updateCallFrameAndPauseIfNeeded

• Component: JavaScriptCore
• Status: RESOLVED WORKSFORME

[Ryosuke Niwa]

Sample stack trace:

Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000000bbadbeef

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebCore             	0x000000010c26b2b5 WebCore::ScriptDebugServer::updateCallFrameAndPauseIfNeeded(JSC::DebuggerCallFrame const&, long, int, int) + 117 (ScriptDebugServer.cpp:403)
1   com.apple.WebCore             	0x000000010c26b586 WebCore::ScriptDebugServer::exception(JSC::DebuggerCallFrame const&, long, int, int, bool) + 134 (ScriptDebugServer.cpp:487)
2   com.apple.JavaScriptCore      	0x0000000109cefc25 JSC::Interpreter::throwException(JSC::ExecState*&, JSC::JSValue&, unsigned int) + 853 (Interpreter.cpp:777)
3   com.apple.JavaScriptCore      	0x0000000109d119d6 JSC::genericThrow(JSC::JSGlobalData*, JSC::ExecState*, JSC::JSValue, unsigned int) + 166 (JITExceptions.cpp:45)
4   com.apple.JavaScriptCore      	0x0000000109e03e7b JSC::LLInt::callToThrow(JSC::ExecState*, JSC::Instruction*) + 155 (LLIntExceptions.cpp:89)
5   com.apple.JavaScriptCore      	0x0000000109e0fa4b JSC::LLInt::handleHostCall(JSC::ExecState*, JSC::Instruction*, JSC::JSValue, JSC::CodeSpecializationKind) + 731 (LLIntSlowPaths.cpp:1374)
6   com.apple.JavaScriptCore      	0x0000000109e107dc JSC::LLInt::setUpCall(JSC::ExecState*, JSC::Instruction*, JSC::CodeSpecializationKind, JSC::JSValue, JSC::LLIntCallLinkInfo*) + 92 (LLIntSlowPaths.cpp:1408)
7   com.apple.JavaScriptCore      	0x0000000109e10766 JSC::LLInt::genericCall(JSC::ExecState*, JSC::Instruction*, JSC::CodeSpecializationKind) + 246 (LLIntSlowPaths.cpp:1464)
8   com.apple.JavaScriptCore      	0x0000000109e0d85c llint_slow_path_call + 60 (LLIntSlowPaths.cpp:1470)
9   com.apple.JavaScriptCore      	0x0000000109e16575 llint_op_call + 184
10  com.apple.JavaScriptCore      	0x0000000109cf4bf4 JSC::JITCode::execute(JSC::JSStack*, JSC::ExecState*, JSC::JSGlobalData*) + 84 (JITCode.h:135)
11  com.apple.JavaScriptCore      	0x0000000109cf16b8 JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::JSObject*) + 4728 (Interpreter.cpp:987)
12  com.apple.JavaScriptCore      	0x0000000109b63927 JSC::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, JSC::JSValue*) + 519 (Completion.cpp:75)
13  com.apple.WebCore             	0x000000010b9d1702 WebCore::JSMainThreadExecState::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, JSC::JSValue*) + 82 (JSMainThreadExecState.h:77)
14  com.apple.WebCore             	0x000000010c25f763 WebCore::ScriptController::evaluateInWorld(WebCore::ScriptSourceCode const&, WebCore::DOMWrapperWorld*) + 339 (ScriptController.cpp:141)
15  com.apple.WebCore             	0x000000010c25f8b4 WebCore::ScriptController::evaluate(WebCore::ScriptSourceCode const&) + 68 (ScriptController.cpp:158)
16  com.apple.WebCore             	0x000000010b60c2cf WebCore::InspectorClient::doDispatchMessageOnFrontendPage(WebCore::Page*, WTF::String const&) + 367 (ScriptSourceCode.h:46)
17  com.apple.WebKit2             	0x0000000108856018 WebKit::WebInspectorClient::sendMessageToFrontend(WTF::String const&) + 104 (WebInspectorClient.cpp:103)
18  com.apple.WebKit2             	0x000000010885606f non-virtual thunk to WebKit::WebInspectorClient::sendMessageToFrontend(WTF::String const&) + 47
19  com.apple.WebCore             	0x000000010b68b4fa WebCore::InspectorFrontend::Debugger::scriptParsed(WTF::String const&, WTF::String const&, int, int, int, int, bool const*, WTF::String const*, bool const*) + 1130 (InspectorFrontend.cpp:779)
20  com.apple.WebCore             	0x000000010b655edd WebCore::InspectorDebuggerAgent::didParseSource(WTF::String const&, WebCore::ScriptDebugListener::Script const&) + 493 (InspectorDebuggerAgent.cpp:667)
21  com.apple.WebCore             	0x000000010b656447 non-virtual thunk to WebCore::InspectorDebuggerAgent::didParseSource(WTF::String const&, WebCore::ScriptDebugListener::Script const&) + 55
22  com.apple.WebCore             	0x000000010c26aba4 WebCore::ScriptDebugServer::dispatchDidParseSource(WTF::HashSet<WebCore::ScriptDebugListener*, WTF::PtrHash<WebCore::ScriptDebugListener*>, WTF::HashTraits<WebCore::ScriptDebugListener*> > const&, JSC::SourceProvider*, bool) + 548 (ScriptDebugServer.cpp:313)
23  com.apple.WebCore             	0x000000010c26af41 WebCore::ScriptDebugServer::sourceParsed(JSC::ExecState*, JSC::SourceProvider*, int, WTF::String const&) + 337 (ScriptDebugServer.cpp:365)
24  com.apple.JavaScriptCore      	0x0000000109d8066d JSC::JSGlobalObject::createProgramCodeBlock(JSC::ExecState*, JSC::ProgramExecutable*, JSC::JSObject**) + 413 (JSGlobalObject.cpp:612)
25  com.apple.JavaScriptCore      	0x0000000109cc0fc2 JSC::ProgramExecutable::initializeGlobalProperties(JSC::JSGlobalData&, JSC::ExecState*, JSC::JSScope*) + 322 (Executable.cpp:384)
26  com.apple.JavaScriptCore      	0x0000000109cf140b JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::JSObject*) + 4043 (Interpreter.cpp:959)
27  com.apple.JavaScriptCore      	0x0000000109b63927 JSC::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, JSC::JSValue*) + 519 (Completion.cpp:75)
28  com.apple.JavaScriptCore      	0x0000000109d55f40 JSEvaluateScript + 304 (JSBase.cpp:57)
29  com.apple.Safari.framework    	0x00000001131cdc3a Safari::FrameMetadata::FrameMetadata(Safari::WK::BundleFrame const&) + 504
30  com.apple.Safari.framework    	0x00000001131cf17f Safari::FormMetadataController::frameMetadata(Safari::WK::BundleFrame const&) + 79
31  com.apple.Safari.framework    	0x00000001131cecf4 Safari::FormMetadataController::getTextFieldMetadata(Safari::WK::BundleFrame const&, Safari::WK::BundleNodeHandle const&, Safari::WK::Dictionary&, Safari::WK::Dictionary&, bool&) + 60
32  com.apple.Safari.framework    	0x00000001130a2b90 Safari::BrowserBundlePageFormClient::textDidChangeInTextField(Safari::WK::BundlePage const&, Safari::WK::BundleFrame const&, Safari::WK::BundleNodeHandle const&) + 70
33  com.apple.Safari.framework    	0x000000011311f6b8 Safari::WK::textDidChangeInTextField(OpaqueWKBundlePage const*, OpaqueWKBundleNodeHandle const*, OpaqueWKBundleFrame const*, void const*) + 91
34  com.apple.WebKit2             	0x000000010864b7e4 WebKit::InjectedBundlePageFormClient::textDidChangeInTextField(WebKit::WebPage*, WebCore::HTMLInputElement*, WebKit::WebFrame*) + 180 (InjectedBundlePageFormClient.cpp:75)
35  com.apple.WebKit2             	0x000000010881dad1 WebKit::WebEditorClient::textDidChangeInTextField(WebCore::Element*) + 193 (WebEditorClient.cpp:345)
36  com.apple.WebCore             	0x000000010b194890 WebCore::Editor::textDidChangeInTextField(WebCore::Element*) + 80 (Editor.cpp:2697)
37  com.apple.WebCore             	0x000000010c5afe06 WebCore::TextFieldInputType::didSetValueByUserEdit(WebCore::TextFieldInputType::ValueChangeState) + 182 (TextFieldInputType.cpp:476)
38  com.apple.WebCore             	0x000000010c5afd45 WebCore::TextFieldInputType::subtreeHasChanged() + 421 (TextFieldInputType.cpp:465)
39  com.apple.WebCore             	0x000000010b4a2b59 WebCore::HTMLInputElement::subtreeHasChanged() + 57 (HTMLInputElement.cpp:556)
40  com.apple.WebCore             	0x000000010b5139e5 WebCore::HTMLTextFormControlElement::defaultEventHandler(WebCore::Event*) + 165 (HTMLTextFormControlElement.cpp:108)
41  com.apple.WebCore             	0x000000010b4a5e6c WebCore::HTMLInputElement::defaultEventHandler(WebCore::Event*) + 1676 (HTMLInputElement.cpp:1217)
42  com.apple.WebCore             	0x000000010c5a2153 WebCore::TextControlInnerTextElement::defaultEventHandler(WebCore::Event*) + 147 (TextControlInnerElements.cpp:98)
43  com.apple.WebCore             	0x000000010b1d7c6b WebCore::EventDispatcher::dispatchEventPostProcess(void*) + 379 (EventDispatcher.cpp:213)
44  com.apple.WebCore             	0x000000010b1d70a9 WebCore::EventDispatcher::dispatch() + 681 (EventDispatcher.cpp:131)
45  com.apple.WebCore             	0x000000010b1d8e26 WebCore::EventDispatchMediator::dispatchEvent(WebCore::EventDispatcher*) const + 134 (EventDispatchMediator.cpp:54)
46  com.apple.WebCore             	0x000000010b1d65d9 WebCore::EventDispatcher::dispatchEvent(WebCore::Node*, WTF::PassRefPtr<WebCore::EventDispatchMediator>) + 281 (EventDispatcher.cpp:56)
47  com.apple.WebCore             	0x000000010be0f861 WebCore::Node::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) + 209 (Node.cpp:2339)
48  com.apple.WebCore             	0x000000010b2070b9 WebCore::EventTarget::dispatchEvent(WTF::PassRefPtr<WebCore::Event>, int&) + 233 (EventTarget.cpp:147)
49  com.apple.WebCore             	0x000000010b18af84 WebCore::dispatchEditableContentChangedEvents(WebCore::Element*, WebCore::Element*) + 132 (Editor.cpp:829)
50  com.apple.WebCore             	0x000000010b18acca WebCore::Editor::appliedEditing(WTF::PassRefPtr<WebCore::CompositeEditCommand>) + 186 (Editor.cpp:841)
51  com.apple.WebCore             	0x000000010c611e37 WebCore::TypingCommand::typingAddedToOpenCommand(WebCore::TypingCommand::ETypingCommand) + 119 (TypingCommand.cpp:340)
52  com.apple.WebCore             	0x000000010c611f3e WebCore::TypingCommand::insertTextRunWithoutNewlines(WTF::String const&, bool) + 206 (TypingCommand.cpp:369)
53  com.apple.WebCore             	0x000000010c6128b2 WebCore::TypingCommandLineOperation::operator()(unsigned long, unsigned long, bool) const + 146 (TypingCommand.cpp:63)
54  com.apple.WebCore             	0x000000010c612665 void WebCore::forEachLineInString<WebCore::TypingCommandLineOperation>(WTF::String const&, WebCore::TypingCommandLineOperation const&) + 165 (TextInsertionBaseCommand.h:61)
55  com.apple.WebCore             	0x000000010c611188 WebCore::TypingCommand::insertText(WTF::String const&, bool) + 72 (TypingCommand.cpp:360)
56  com.apple.WebCore             	0x000000010c611a00 WebCore::TypingCommand::doApply() + 336 (TypingCommand.cpp:283)
57  com.apple.WebCore             	0x000000010ad38d93 WebCore::CompositeEditCommand::apply() + 451 (CompositeEditCommand.cpp:215)
58  com.apple.WebCore             	0x000000010ad38bc1 WebCore::applyCommand(WTF::PassRefPtr<WebCore::CompositeEditCommand>) + 17 (CompositeEditCommand.cpp:171)
59  com.apple.WebCore             	0x000000010c5b0bf7 WebCore::TextInsertionBaseCommand::applyTextInsertionCommand(WebCore::Frame*, WTF::PassRefPtr<WebCore::TextInsertionBaseCommand>, WebCore::VisibleSelection const&, WebCore::VisibleSelection const&) + 119 (TextInsertionBaseCommand.cpp:49)
60  com.apple.WebCore             	0x000000010c6110e0 WebCore::TypingCommand::insertText(WebCore::Document*, WTF::String const&, WebCore::VisibleSelection const&, unsigned int, WebCore::TypingCommand::TextCompositionType) + 848 (TypingCommand.cpp:198)
61  com.apple.WebCore             	0x000000010b187451 WebCore::Editor::insertTextWithoutSendingTextEvent(WTF::String const&, bool, WebCore::TextEvent*) + 1041 (Editor.cpp:983)
62  com.apple.WebCore             	0x000000010b18696c WebCore::Editor::handleTextEvent(WebCore::TextEvent*) + 460 (Editor.cpp:243)
63  com.apple.WebCore             	0x000000010b1ebe98 WebCore::EventHandler::defaultTextInputEventHandler(WebCore::TextEvent*) + 40 (EventHandler.cpp:3629)
64  com.apple.WebCore             	0x000000010be109fc WebCore::Node::defaultEventHandler(WebCore::Event*) + 764 (Node.cpp:2504)
65  com.apple.WebCore             	0x000000010b5139fa WebCore::HTMLTextFormControlElement::defaultEventHandler(WebCore::Event*) + 186 (HTMLTextFormControlElement.cpp:112)
66  com.apple.WebCore             	0x000000010b4a5e6c WebCore::HTMLInputElement::defaultEventHandler(WebCore::Event*) + 1676 (HTMLInputElement.cpp:1217)
67  com.apple.WebCore             	0x000000010b1d7c6b WebCore::EventDispatcher::dispatchEventPostProcess(void*) + 379 (EventDispatcher.cpp:213)
68  com.apple.WebCore             	0x000000010b1d70a9 WebCore::EventDispatcher::dispatch() + 681 (EventDispatcher.cpp:131)
69  com.apple.WebCore             	0x000000010b1d8e26 WebCore::EventDispatchMediator::dispatchEvent(WebCore::EventDispatcher*) const + 134 (EventDispatchMediator.cpp:54)
70  com.apple.WebCore             	0x000000010b1d65d9 WebCore::EventDispatcher::dispatchEvent(WebCore::Node*, WTF::PassRefPtr<WebCore::EventDispatchMediator>) + 281 (EventDispatcher.cpp:56)
71  com.apple.WebCore             	0x000000010be0f861 WebCore::Node::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) + 209 (Node.cpp:2339)
72  com.apple.WebCore             	0x000000010b2070b9 WebCore::EventTarget::dispatchEvent(WTF::PassRefPtr<WebCore::Event>, int&) + 233 (EventTarget.cpp:147)
73  com.apple.WebCore             	0x000000010b1ebc7d WebCore::EventHandler::handleTextInputEvent(WTF::String const&, WebCore::Event*, WebCore::TextEventInputType) + 557 (EventHandler.cpp:3594)
74  com.apple.WebCore             	0x000000010b18b856 WebCore::Editor::insertText(WTF::String const&, WebCore::Event*) + 54 (Editor.cpp:928)
75  com.apple.WebKit2             	0x00000001088b3848 WebKit::WebPage::executeKeypressCommandsInternal(WTF::Vector<WebCore::KeypressCommand, 0ul> const&, WebCore::KeyboardEvent*) + 424 (WebPageMac.mm:170)
76  com.apple.WebKit2             	0x00000001088b44f2 WebKit::WebPage::handleEditingKeyboardEvent(WebCore::KeyboardEvent*, bool) + 882 (WebPageMac.mm:234)
77  com.apple.WebKit2             	0x0000000108821bb6 WebKit::WebEditorClient::handleKeyboardEvent(WebCore::KeyboardEvent*) + 38 (WebEditorClientMac.mm:64)
78  com.apple.WebCore             	0x000000010b186742 WebCore::Editor::handleKeyboardEvent(WebCore::KeyboardEvent*) + 66 (Editor.cpp:213)
79  com.apple.WebCore             	0x000000010b1eab00 WebCore::EventHandler::defaultKeyboardEventHandler(WebCore::KeyboardEvent*) + 432 (EventHandler.cpp:3329)
80  com.apple.WebCore             	0x000000010be107f0 WebCore::Node::defaultEventHandler(WebCore::Event*) + 240 (Node.cpp:2473)
81  com.apple.WebCore             	0x000000010b5139fa WebCore::HTMLTextFormControlElement::defaultEventHandler(WebCore::Event*) + 186 (HTMLTextFormControlElement.cpp:112)
82  com.apple.WebCore             	0x000000010b4a59da WebCore::HTMLInputElement::defaultEventHandler(WebCore::Event*) + 506 (HTMLInputElement.cpp:1157)
83  com.apple.WebCore             	0x000000010b1d7c6b WebCore::EventDispatcher::dispatchEventPostProcess(void*) + 379 (EventDispatcher.cpp:213)
84  com.apple.WebCore             	0x000000010b1d70a9 WebCore::EventDispatcher::dispatch() + 681 (EventDispatcher.cpp:131)
85  com.apple.WebCore             	0x000000010b1d8e26 WebCore::EventDispatchMediator::dispatchEvent(WebCore::EventDispatcher*) const + 134 (EventDispatchMediator.cpp:54)
86  com.apple.WebCore             	0x000000010b1d65d9 WebCore::EventDispatcher::dispatchEvent(WebCore::Node*, WTF::PassRefPtr<WebCore::EventDispatchMediator>) + 281 (EventDispatcher.cpp:56)
87  com.apple.WebCore             	0x000000010be0f861 WebCore::Node::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) + 209 (Node.cpp:2339)
88  com.apple.WebCore             	0x000000010b2070b9 WebCore::EventTarget::dispatchEvent(WTF::PassRefPtr<WebCore::Event>, int&) + 233 (EventTarget.cpp:147)
89  com.apple.WebCore             	0x000000010b1ea7d5 WebCore::EventHandler::keyEvent(WebCore::PlatformKeyboardEvent const&) + 2357 (EventHandler.cpp:3240)
90  com.apple.WebKit2             	0x000000010888ae85 WebKit::handleKeyEvent(WebKit::WebKeyboardEvent const&, WebCore::Page*) + 261 (WebPage.cpp:1645)
91  com.apple.WebKit2             	0x000000010888ad17 WebKit::WebPage::keyEvent(WebKit::WebKeyboardEvent const&) + 103 (WebPage.cpp:1655)
92  com.apple.WebKit2             	0x00000001088d1e07 void CoreIPC::callMemberFunction<WebKit::WebPage, void (WebKit::WebPage::*)(WebKit::WebKeyboardEvent const&), WebKit::WebKeyboardEvent>(CoreIPC::Arguments1<WebKit::WebKeyboardEvent> const&, WebKit::WebPage*, void (WebKit::WebPage::*)(WebKit::WebKeyboardEvent const&)) + 135 (HandleMessage.h:22)
93  com.apple.WebKit2             	0x00000001088c445c void CoreIPC::handleMessage<Messages::WebPage::KeyEvent, WebKit::WebPage, void (WebKit::WebPage::*)(WebKit::WebKeyboardEvent const&)>(CoreIPC::MessageDecoder&, WebKit::WebPage*, void (WebKit::WebPage::*)(WebKit::WebKeyboardEvent const&)) + 124 (HandleMessage.h:341)
94  com.apple.WebKit2             	0x00000001088be81c WebKit::WebPage::didReceiveWebPageMessage(CoreIPC::Connection*, CoreIPC::MessageDecoder&) + 1612 (WebPageMessageReceiver.cpp:127)
95  com.apple.WebKit2             	0x000000010888f047 WebKit::WebPage::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageDecoder&) + 471 (WebPage.cpp:3010)
96  com.apple.WebKit2             	0x000000010888f087 non-virtual thunk to WebKit::WebPage::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageDecoder&) + 55
97  com.apple.WebKit2             	0x0000000108663727 CoreIPC::MessageReceiverMap::dispatchMessage(CoreIPC::Connection*, CoreIPC::MessageDecoder&) + 519 (MessageReceiverMap.cpp:87)
98  com.apple.WebKit2             	0x000000010896b42a WebKit::WebProcess::didReceiveMessage(CoreIPC::Connection*, CoreIPC::MessageDecoder&) + 58 (WebProcess.cpp:598)
99  com.apple.WebKit2             	0x00000001085c1bf3 CoreIPC::Connection::dispatchMessage(CoreIPC::MessageDecoder&) + 51 (Connection.cpp:758)
100 com.apple.WebKit2             	0x00000001085be3da CoreIPC::Connection::dispatchMessage(WTF::PassOwnPtr<CoreIPC::MessageDecoder>) + 218 (Connection.cpp:780)
101 com.apple.WebKit2             	0x00000001085c1b8b CoreIPC::Connection::dispatchOneMessage() + 203 (Connection.cpp:806)
102 com.apple.WebKit2             	0x00000001085cd202 WTF::FunctionWrapper<void (CoreIPC::Connection::*)()>::operator()(CoreIPC::Connection*) + 114 (Functional.h:218)
103 com.apple.WebKit2             	0x00000001085cd185 WTF::BoundFunctionImpl<WTF::FunctionWrapper<void (CoreIPC::Connection::*)()>, void (CoreIPC::Connection*)>::operator()() + 53 (Functional.h:496)
104 com.apple.WebCore             	0x000000010c2440e9 WTF::Function<void ()>::operator()() const + 137 (Functional.h:704)
105 com.apple.WebCore             	0x000000010c243daf WebCore::RunLoop::performWork() + 207 (RunLoop.cpp:93)
106 com.apple.WebCore             	0x000000010c24510e WebCore::RunLoop::performWork(void*) + 62 (RunLoopCF.cpp:66)
107 com.apple.CoreFoundation      	0x00007fff8aab1101 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
108 com.apple.CoreFoundation      	0x00007fff8aab0a25 __CFRunLoopDoSources0 + 245
109 com.apple.CoreFoundation      	0x00007fff8aad3dc5 __CFRunLoopRun + 789
110 com.apple.CoreFoundation      	0x00007fff8aad36b2 CFRunLoopRunSpecific + 290
111 com.apple.HIToolbox           	0x00007fff88fb80a4 RunCurrentEventLoopInMode + 209
112 com.apple.HIToolbox           	0x00007fff88fb7e42 ReceiveNextEventCommon + 356
113 com.apple.HIToolbox           	0x00007fff88fb7cd3 BlockUntilNextEventMatchingListInMode + 62
114 com.apple.AppKit              	0x00007fff8ae0a613 _DPSNextEvent + 685
115 com.apple.AppKit              	0x00007fff8ae09ed2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
116 com.apple.AppKit              	0x00007fff8ae01283 -[NSApplication run] + 517
117 com.apple.WebCore             	0x000000010c245d59 WebCore::RunLoop::run() + 105 (RunLoopMac.mm:44)
118 com.apple.WebKit2             	0x00000001087dae85 int WebKit::ChildProcessMain<WebKit::WebProcess, WebKit::WebContentProcessMainDelegate>(int, char**) + 917 (ChildProcessEntryPoint.h:98)
119 com.apple.WebKit2             	0x00000001087daadb WebContentProcessMain + 27 (WebContentProcessMain.mm:179)
120 com.apple.WebProcess          	0x0000000108559d44 WebKit::BootstrapMain(int, char**) + 308 (ChildProcessMain.mm:73)
121 com.apple.WebProcess          	0x0000000108559c02 main + 34 (ChildProcessMain.mm:80)
122 libdyld.dylib                 	0x00007fff8d78a7e1 start + 1

[Geoffrey Garen]

Ryosuke, can you add some steps to reproduce here?

[Ryosuke Niwa]

(In reply to comment #1)
> Ryosuke, can you add some steps to reproduce here?

It appears to happen when I'm typing something in Bugzilla but I haven't nailed down the the exact step yet. It could be related to some navigations as well.

[Ryosuke Niwa]

I haven’t seen this crash since that nightly build. It was probably a temporary bustage.