[vbox-dev] a rare crash in vboxc.dll

[Huihong Luo]

  ntdll.dll!_DbgBreakPoint at 0()  
  ntdll.dll!_RtlpBreakPointHeap at 4()  + 0x28 bytes 
  ntdll.dll!_RtlpCoalesceFreeBlocks at 16()  + 0x1399b bytes 
  ntdll.dll!@RtlpFreeHeap at 16()  + 0x10c bytes 
  ntdll.dll!_RtlFreeHeap at 12()  + 0x2e49 bytes 
  ntdll.dll!_RtlDebugFreeHeap at 12()  + 0x1f8 bytes 
  ntdll.dll!@RtlpFreeHeap at 16()  + 0x13cdd bytes 
  ntdll.dll!_RtlFreeHeap at 12()  + 0x2e49 bytes 
  kernel32.dll!_HeapFree at 12()  + 0x14 bytes 
  msvcr80.dll!free(void * pBlock=0x043f5dd0)  Line 110 C
  VBoxC.dll!HGCMThread::`scalar deleting destructor'()  + 0x57 bytes C++
  VBoxC.dll!hgcmObjDereference(HGCMObject * pObject=0x043f5dd0)  Line 265 + 0x3c bytes C++
> VBoxC.dll!HGCMMsgCore::~HGCMMsgCore()  Line 171 + 0x6 bytes C++
  VBoxC.dll!HGCMMsgSvcUnload::`scalar deleting destructor'()  + 0xb bytes C++
  VBoxC.dll!hgcmObjDereference(HGCMObject * pObject=0x02277880)  Line 265 + 0x3c bytes C++
  VBoxC.dll!hgcmMsgSend(unsigned int hMsg=2147484333)  Line 775 + 0x16 bytes C++
  VBoxC.dll!HGCMService::instanceDestroy()  Line 801 + 0x9 bytes C++
  VBoxC.dll!HGCMService::ReleaseService()  Line 1054 C++
  VBoxC.dll!hgcmThread(unsigned int ThreadHandle=2147483649, void * pvUser=0x00000000)  Line 1761 + 0xf bytes C++
  VBoxC.dll!hgcmWorkerThreadFunc(RTTHREADINT * ThreadSelf=0x022d5878, void * pvUser=0x022d57e8)  Line 199 C++
  VBoxRT.dll!rtThreadMain(RTTHREADINT * pThread=0x022d5878, unsigned int NativeThread=1684, const char * pszThreadName=0x022d5df4)  Line 679 + 0xa bytes C++
  VBoxRT.dll!rtThreadNativeMain(void * pvArgs=0x022d5878)  Line 102 + 0xe bytes C++
  msvcr80.dll!_callthreadstartex()  Line 348 + 0x6 bytes C
  msvcr80.dll!_threadstartex(void * ptd=0x0225a118)  Line 326 + 0x5 bytes C
  kernel32.dll!@BaseThreadInitThunk at 12()  + 0x12 bytes 
  ntdll.dll!___RtlUserThreadStart at 8()  + 0x27 bytes 
  ntdll.dll!__RtlUserThreadStart at 8()  + 0x1b bytes 
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