[Webkit-unassigned] [Bug 177249] New: inspector/dom/content-node-region-info.html and inspector/dom/content-flow tests crashing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177249

            Bug ID: 177249
           Summary: inspector/dom/content-node-region-info.html and
                    inspector/dom/content-flow tests crashing
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ryanhaddad at apple.com

inspector/dom/content-node-region-info.html and inspector/dom/content-flow tests crashing

https://build.webkit.org/results/Apple%20Sierra%20Release%20WK2%20(Tests)/r222259%20(4421)/results.html

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore            0x0000000108621c19 Inspector::InspectorObjectBase::writeJSON(WTF::StringBuilder&) const + 361 (InspectorValues.cpp:784)
1   com.apple.JavaScriptCore            0x0000000108621c22 Inspector::InspectorObjectBase::writeJSON(WTF::StringBuilder&) const + 370 (InspectorValues.cpp:777)
2   com.apple.JavaScriptCore            0x00000001086208f3 Inspector::InspectorValue::toJSONString() const + 83 (InspectorValues.cpp:549)
3   com.apple.JavaScriptCore            0x00000001085d0bf1 Inspector::BackendDispatcher::sendResponse(long, WTF::RefPtr<Inspector::InspectorObject>&&) + 321 (InspectorBackendDispatcher.cpp:197)
4   com.apple.JavaScriptCore            0x00000001085d89fe Inspector::CSSBackendDispatcher::getNamedFlowCollection(long, WTF::RefPtr<Inspector::InspectorObject>&&) + 558 (InspectorBackendDispatchers.cpp:722)
5   com.apple.JavaScriptCore            0x00000001085d5b04 Inspector::CSSBackendDispatcher::dispatch(long, WTF::String const&, WTF::Ref<Inspector::InspectorObject>&&) + 580 (InspectorBackendDispatchers.cpp:257)
6   com.apple.JavaScriptCore            0x00000001085d1685 Inspector::BackendDispatcher::dispatch(WTF::String const&) + 2293 (Ref.h:57)
7   com.apple.WebKit                    0x000000010382f142 void IPC::handleMessage<Messages::WebInspector::SendMessageToBackend, WebKit::WebInspector, void (WebKit::WebInspector::*)(WTF::String const&)>(IPC::Decoder&, WebKit::WebInspector*, void (WebKit::WebInspector::*)(WTF::String const&)) + 66 (HandleMessage.h:127)
8   com.apple.WebKit                    0x000000010366571b IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) + 119 (Connection.cpp:930)
9   com.apple.WebKit                    0x000000010366825a IPC::Connection::dispatchOneMessage() + 176 (Connection.cpp:959)
10  com.apple.JavaScriptCore            0x0000000108ab89d4 WTF::RunLoop::performWork() + 164 (RunLoop.cpp:107)
11  com.apple.JavaScriptCore            0x0000000108ab8bf2 WTF::RunLoop::performWork(void*) + 34 (RunLoopCF.cpp:39)
12  com.apple.CoreFoundation            0x00007fff8b84b3e1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
13  com.apple.CoreFoundation            0x00007fff8b82c65c __CFRunLoopDoSources0 + 556
14  com.apple.CoreFoundation            0x00007fff8b82bb46 __CFRunLoopRun + 934
15  com.apple.CoreFoundation            0x00007fff8b82b544 CFRunLoopRunSpecific + 420
16  com.apple.HIToolbox                 0x00007fff8ad8bebc RunCurrentEventLoopInMode + 240
17  com.apple.HIToolbox                 0x00007fff8ad8bcf1 ReceiveNextEventCommon + 432
18  com.apple.HIToolbox                 0x00007fff8ad8bb26 _BlockUntilNextEventMatchingListInModeWithFilter + 71
19  com.apple.AppKit                    0x00007fff89324a54 _DPSNextEvent + 1120
20  com.apple.AppKit                    0x00007fff89aa07ee -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 2796
21  com.apple.AppKit                    0x00007fff893193db -[NSApplication run] + 926
22  com.apple.AppKit                    0x00007fff892e3e0e NSApplicationMain + 1237
23  libxpc.dylib                        0x00007fffa17bc8c7 _xpc_objc_main + 775
24  libxpc.dylib                        0x00007fffa17bb2e4 xpc_main + 494
25  com.apple.WebKit.WebContent         0x000000010360c69a main + 490 (XPCServiceMain.mm:122)
26  libdyld.dylib                       0x00007fffa1563235 start + 1

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