[BUG] WebKit under debug crashes on Windows

[pavelfeldman]

WTF!WTFCrash+0x1f
JavaScriptCore!WTFCrashWithInfo+0x31
JavaScriptCore!Inspector::InspectorTarget::setResumeCallback+0x83
WebKit2!WebKit::WebPageInspectorController::setContinueLoadingCallback+0xea
WebKit2!WebKit::WebPageProxy::decidePolicyForNavigationActionAsync+0x21c
WebKit2!IPC::callMemberFunctionImpl<WebKit::WebPageProxy,void (__cdecl WebKit::WebPageProxy::*)(WTF::ObjectIdentifier<enum WebCore::FrameIdentifierType>,WebCore::SecurityOriginData &&,WebCore::PolicyCheckIdentifier,unsigned __int64,WebKit::NavigationActionData &&,WebKit::FrameInfoData &&,WTF::Optional<WTF::ObjectIdentifier<enum WebKit::WebPageProxyIdentifierType> >,WebCore::ResourceRequest const &,WebCore::ResourceRequest &&,IPC::FormDataReference &&,WebCore::ResourceResponse &&,WebKit::UserData const &,unsigned __int64),std::tuple<WTF::ObjectIdentifier<enum WebCore::FrameIdentifierType>,WebCore::SecurityOriginData,WebCore::PolicyCheckIdentifier,unsigned __int64,WebKit::NavigationActionData,WebKit::FrameInfoData,WTF::Optional<WTF::ObjectIdentifier<enum WebKit::WebPageProxyIdentifierType> >,WebCore::ResourceRequest,WebCore::ResourceRequest,IPC::FormDataReference,WebCore::ResourceResponse,WebKit::UserData,unsigned __int64>,0,1,2,3,4,5,6,7,8,9,10,11,12>+0x501
WebKit2!IPC::callMemberFunction<WebKit::WebPageProxy,void (__cdecl WebKit::WebPageProxy::*)(WTF::ObjectIdentifier<enum WebCore::FrameIdentifierType>,WebCore::SecurityOriginData &&,WebCore::PolicyCheckIdentifier,unsigned __int64,WebKit::NavigationActionData &&,WebKit::FrameInfoData &&,WTF::Optional<WTF::ObjectIdentifier<enum WebKit::WebPageProxyIdentifierType> >,WebCore::ResourceRequest const &,WebCore::ResourceRequest &&,IPC::FormDataReference &&,WebCore::ResourceResponse &&,WebKit::UserData const &,unsigned __int64),std::tuple<WTF::ObjectIdentifier<enum WebCore::FrameIdentifierType>,WebCore::SecurityOriginData,WebCore::PolicyCheckIdentifier,unsigned __int64,WebKit::NavigationActionData,WebKit::FrameInfoData,WTF::Optional<WTF::ObjectIdentifier<enum WebKit::WebPageProxyIdentifierType> >,WebCore::ResourceRequest,WebCore::ResourceRequest,IPC::FormDataReference,WebCore::ResourceResponse,WebKit::UserData,unsigned __int64>,std::integer_sequence<unsigned __int64,0,1,2,3,4,5,6,7,8,9,10,11,12> >+0x92
WebKit2!IPC::handleMessage<Messages::WebPageProxy::DecidePolicyForNavigationActionAsync,WebKit::WebPageProxy,void (__cdecl WebKit::WebPageProxy::*)(WTF::ObjectIdentifier<enum WebCore::FrameIdentifierType>,WebCore::SecurityOriginData &&,WebCore::PolicyCheckIdentifier,unsigned __int64,WebKit::NavigationActionData &&,WebKit::FrameInfoData &&,WTF::Optional<WTF::ObjectIdentifier<enum WebKit::WebPageProxyIdentifierType> >,WebCore::ResourceRequest const &,WebCore::ResourceRequest &&,IPC::FormDataReference &&,WebCore::ResourceResponse &&,WebKit::UserData const &,unsigned __int64)>+0x150
WebKit2!WebKit::WebPageProxy::didReceiveMessage+0x18af
WebKit2!IPC::MessageReceiverMap::dispatchMessage+0x199
WebKit2!WebKit::AuxiliaryProcessProxy::dispatchMessage+0x4a
WebKit2!WebKit::WebProcessProxy::didReceiveMessage+0x56
WebKit2!IPC::Connection::dispatchMessage+0x261
WebKit2!IPC::Connection::dispatchMessage+0x393
WebKit2!IPC::Connection::dispatchIncomingMessages+0x284

[pavelfeldman]

ExceptionAddress: 00007ff84dc91f9f (WTF!WTFCrash+0x000000000000001f)
   ExceptionCode: c0000005 (Access violation)
  ExceptionFlags: 00000000
NumberParameters: 2
   Parameter[0]: 0000000000000001
   Parameter[1]: 00000000bbadbeef
Attempt to write to address 00000000bbadbeef

PROCESS_NAME:  MiniBrowser.exe

WRITE_ADDRESS:  00000000bbadbeef 

ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%p referenced memory at 0x%p. The memory could not be %s.

EXCEPTION_CODE_STR:  c0000005

EXCEPTION_PARAMETER1:  0000000000000001

EXCEPTION_PARAMETER2:  00000000bbadbeef

[aslushnikov]

This was an assert; assert has been removed.