Unhandled exception at 0x00000000006F38F54A (Qt5Widgets.dll) in ***.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFF.



  • Unhandled exception at 0x00000000006F38F54A (Qt5Widgets.dll) in ***.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFF.
    my app crashed, and got this info....
    what reason normally cause this problem? i use mult-thread, and emit signal to show messagebox in mainthread, and update or Qt ui in mainthread.


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