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PyQt6 App crashes on windows due to stack buffer overrun

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  • I Offline
    I Offline
    iff7378
    wrote on 20 Jun 2024, 13:20 last edited by
    #1

    I have a simple python application using PyQt6 for a GUI framework that is packaged into an exe using pyinstaller.

    The program runs fine on my development PC and a few production machines in Windows 10 Enterprise LTSC. However, on some production machines running Window 10 Enterprise 2016 LTSB the program crashes as soon as I make any calls to anything in QtCore like .isRunning() or start(). The windows error log has the following:

    Sig[0].Name=Application Name
    Sig[0].Value=datalogger.exe
    Sig[1].Name=Application Version
    Sig[1].Value=0.1.4.0
    Sig[2].Name=Application Timestamp
    Sig[2].Value=667340f9
    Sig[3].Name=Fault Module Name
    Sig[3].Value=Qt6Core.dll
    Sig[4].Name=Fault Module Version
    Sig[4].Value=6.7.1.0
    Sig[5].Name=Fault Module Timestamp
    Sig[5].Value=663b5bfb
    Sig[6].Name=Exception Offset
    Sig[6].Value=0000000000025508
    Sig[7].Name=Exception Code
    Sig[7].Value=c0000409
    Sig[8].Name=Exception Data
    Sig[8].Value=0000000000000007
    DynamicSig[1].Name=OS Version
    DynamicSig[1].Value=10.0.14393.2.0.0.256.125
    DynamicSig[2].Name=Locale ID
    DynamicSig[2].Value=1033
    DynamicSig[22].Name=Additional Information 1
    DynamicSig[22].Value=ce64
    DynamicSig[23].Name=Additional Information 2
    DynamicSig[23].Value=ce64f5808a4df595b5b54fc8c2342a6f
    DynamicSig[24].Name=Additional Information 3
    DynamicSig[24].Value=b544
    DynamicSig[25].Name=Additional Information 4
    DynamicSig[25].Value=b5447422a04d91cb71947b30f1ebcc35

    Its a buffer overrun according to the exception code. Any idea why this would be happening? Is it a Windows issue?

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    • I Offline
      I Offline
      iff7378
      wrote on 20 Jun 2024, 19:20 last edited by
      #2

      Found the issue here. Turned out to be not initializing the a class properly and then tried to refer to it later in the code. Odd that it threw this error instead of an error in python

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      • S Offline
        S Offline
        SGaist
        Lifetime Qt Champion
        wrote on 20 Jun 2024, 20:56 last edited by
        #3

        Hi and welcome to devnet,

        What kind of object was not properly initialized ?

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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        1/3

        20 Jun 2024, 13:20

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