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Unhandled exception at 0x0000000064E3A45A (Qt5Widgetsd.dll)

    Mesh Viewer(Qt4 version).I was compiled it succssfully with vs2013 addin Qt5, but it throw this exception when I start debugging.

    Unhandled exception at 0x0000000064E3A45A (Qt5Widgetsd.dll) in mview.exe: 0xC0000005: Access violation reading location 0x0000000000000008.

    The cursor which in vs13 Call stack stops here and show some thing.
    Qt5Widgetsd.dll!QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData> >::data() Line 135

    I want to know what happened,and how to solve this problem.

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