Quote Originally Posted by wysota View Post
First of all build your app in debug mode.
It was in debug mode... OK, I've loaded system debug symbols but it did not clear anything.
I just can't understand why it happens if I almost do not add any custom code - only a few lines of code from documentation... Something wrong with my system?
Btw, I tried to switch to Qt 4.8.4 - the same story.

Call stack:
Qt Code: 
  1. >	KernelBase.dll!_RaiseException@16()  + 0x58 bytes	
  2.  	rpcrt4.dll!_RpcpRaiseException@4()  + 0x2f bytes	
  3.  	rpcrt4.dll!NdrpRaisePipeException()  + 0x16 bytes	
  4.  	rpcrt4.dll!NdrReceive()  + 0x1e55 bytes	
  5.  	rpcrt4.dll!NdrLastAsyncReceive()  + 0x2c bytes	
  6.  	rpcrt4.dll!NdrpCompleteAsyncClientCall()  + 0x85 bytes	
  7.  	rpcrt4.dll!Ndr64pCompleteAsyncCall()  + 0x67 bytes	
  8.  	rpcrt4.dll!_RpcAsyncCompleteCall@8()  + 0x1e bytes	
  9.  	wlanapi.dll!_ClientRpcCallback@12()  + 0xa0 bytes	
  10.  	rpcrt4.dll!I_RpcAPCRoutine()  + 0x2c bytes	
  11.  	ntdll.dll!_KiUserApcDispatcher@16()  + 0x25 bytes	
  12.  	kernel32.dll!_WaitForSingleObjectExImplementation@12()  + 0x43 bytes	
  13.  	wlanapi.dll!_NotificationApcThreadProc@4()  + 0x54 bytes	
  14.  	kernel32.dll!@BaseThreadInitThunk@12()  + 0x12 bytes	
  15.  	ntdll.dll!___RtlUserThreadStart@8()  + 0x27 bytes	
  16.  	ntdll.dll!__RtlUserThreadStart@8()  + 0x1b bytes
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Threads:
Qt Code: 
  1. Unflagged		47848	0	Main Thread	Main Thread	QPushButton::`scalar deleting destructor'	Normal
  2. Unflagged		48388	0	Worker Thread	_TppWaiterpThread@4	_ZwWaitForMultipleObjects@20	Normal
  3. Unflagged		47932	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
  4. Unflagged		48856	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
  5. Unflagged		31392	0	RPC Thread	RPC Callback Thread	CROIDTable::WorkerThreadLoop	Normal
  6. Unflagged		48988	0	Worker Thread	_timeThread@4	_ZwWaitForMultipleObjects@20	Time Critical
  7. Unflagged		43132	0	Worker Thread	bearerThread	_NtWaitForSingleObject@12	Normal
  8. Unflagged	>	45812	0	Worker Thread	_NotificationApcThreadProc@4	_RaiseException@16	Normal
  9. Unflagged		49048	0	Worker Thread	httpThread	_ZwWaitForMultipleObjects@20	Normal
  10. Unflagged		48496	0	Worker Thread	Thread (pooled)	_NtWaitForSingleObject@12	Normal
  11. Unflagged		49036	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
  12. Unflagged		48080	0	Worker Thread	_SockAsyncThread@4	_ZwRemoveIoCompletion@20	Above Normal
  13. Unflagged		48172	0	Worker Thread	Win32 Thread	_ZwWaitForMultipleObjects@20	Normal
  14. Unflagged		48000	0	Worker Thread	_TppWorkerThread@4	_NtWaitForWorkViaWorkerFactory@8	Normal
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