[Webkit-unassigned] [Bug 137529] New: [Win] Crashing in inspector-protocol tests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=137529

           Summary: [Win] Crashing in inspector-protocol tests
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bfulgham at webkit.org


We are experiencing two inspector-protocol failures:

inspector-protocol/debugger/terminate-dedicated-worker-while-paused.html
inspector-protocol/debugger/pause-on-assert.html

It appears that the inspector is getting disconnected from the worker process before all messages have been processed. When this happens, we attempt to dereference a null pointer and the process crashes:

Call stack:
>	WebKit.dll!WebCore::WorkerMessagingProxy::postMessageToPageInspector::__l3::<lambda>(WebCore::ScriptExecutionContext & __formal) Line 299	C++
     [External Code]    
     WebKit.dll!WebCore::ScriptExecutionContext::Task::performTask(WebCore::ScriptExecutionContext & context) Line 144    C++
     WebKit.dll!WebCore::Document::postTask::__l8::<lambda>() Line 5012    C++
     [External Code]    
     WTF.dll!WTF::callFunctionObject(void * context) Line 213    C++
     WTF.dll!WTF::dispatchFunctionsFromMainThread() Line 165    C++
     WTF.dll!WTF::ThreadingWindowWndProc(HWND__ * hWnd, unsigned int message, unsigned int wParam, long lParam) Line 47    C++
     [External Code]    
     DumpRenderTree.dll!runTest(const std::basic_string<char,std::char_traits<char>,std::allocator<char> > & inputLine) Line 1095    C++
     DumpRenderTree.dll!main(int argc, const char * * argv) Line 1383    C++
     DumpRenderTree.dll!dllLauncherEntryPoint(int argc, const char * * argv) Line 1408    C++
     DumpRenderTree.exe!main(int argc, const char * * argv) Line 235    C++
     [External Code]    

m_pageInspector is 0, because WorkerMessagingProxy::disconnectFromInspector was called before the worker runloop was empty of messages for the inspector.

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