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Unhandled exception no stack

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  • V Offline
    V Offline
    VRonin
    wrote on 29 Jan 2018, 12:50 last edited by
    #1

    Hi guys, strange one, I get an access violation in ole32: Unhandled exception at 0x755BC8F6 (ole32.dll) in MyApp.exe: 0xC0000005: Access violation reading location 0xFEEEFEEE. but all stack traces of all threads are empty and the error happens when the application is idle so I don't know how to pinpoint the problem. Ideas?

    "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
    ~Napoleon Bonaparte

    On a crusade to banish setIndexWidget() from the holy land of Qt

    J J 2 Replies Last reply 29 Jan 2018, 12:53
    0
    • V VRonin
      29 Jan 2018, 12:50

      Hi guys, strange one, I get an access violation in ole32: Unhandled exception at 0x755BC8F6 (ole32.dll) in MyApp.exe: 0xC0000005: Access violation reading location 0xFEEEFEEE. but all stack traces of all threads are empty and the error happens when the application is idle so I don't know how to pinpoint the problem. Ideas?

      J Offline
      J Offline
      J.Hilk
      Moderators
      wrote on 29 Jan 2018, 12:53 last edited by
      #2

      @VRonin mmh, have you tried to replace it? Maybe it went corrupt during the last Windows update, Windows doesn't necessarily tell you when it does updates these days.


      Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


      Q: What's that?
      A: It's blue light.
      Q: What does it do?
      A: It turns blue.

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      • V Offline
        V Offline
        VRonin
        wrote on 29 Jan 2018, 14:14 last edited by
        #3

        I'm pretty sure it's something wrong in my code. The crash happens only when I have a particular dialog open. I'd just like to find a way to identify my bug.

        Qt 5.8 MSCV 2013 on Win7 for the record

        "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
        ~Napoleon Bonaparte

        On a crusade to banish setIndexWidget() from the holy land of Qt

        K 1 Reply Last reply 30 Jan 2018, 09:55
        0
        • V VRonin
          29 Jan 2018, 14:14

          I'm pretty sure it's something wrong in my code. The crash happens only when I have a particular dialog open. I'd just like to find a way to identify my bug.

          Qt 5.8 MSCV 2013 on Win7 for the record

          K Offline
          K Offline
          kshegunov
          Moderators
          wrote on 30 Jan 2018, 09:55 last edited by
          #4

          I have seen that with file dialogs on windows, but I don't think it's anything specific to your code. If I remember correctly the exception happens when the file dialog is initialized somewhere deep in windows' stuff and is "harmless". Try using the alien file dialog (if that's your case).

          Read and abide by the Qt Code of Conduct

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          • V VRonin
            29 Jan 2018, 12:50

            Hi guys, strange one, I get an access violation in ole32: Unhandled exception at 0x755BC8F6 (ole32.dll) in MyApp.exe: 0xC0000005: Access violation reading location 0xFEEEFEEE. but all stack traces of all threads are empty and the error happens when the application is idle so I don't know how to pinpoint the problem. Ideas?

            J Offline
            J Offline
            JonB
            wrote on 30 Jan 2018, 15:16 last edited by
            #5

            @VRonin
            You know a lot more than I do, so I'm only throwing this out there as a possible hint....!

            This may not apply because of your ole32 stuff. But often when you cannot get any stack trace at a crash it's indicative that a local variable on the stack has been overwritten beyond the end (like, a local array and you've gone over the end of it) --- that goes up the stack and trashes the call stack information... ?

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            • V Offline
              V Offline
              VRonin
              wrote on 1 Feb 2018, 18:41 last edited by
              #6

              The release build show no crashes. I honestly don't want to know what was going on there (even though I was using QFileDialog so k's answer was probably correct. Thanks for the help everyone

              "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
              ~Napoleon Bonaparte

              On a crusade to banish setIndexWidget() from the holy land of Qt

              K 1 Reply Last reply 1 Feb 2018, 20:07
              0
              • V VRonin
                1 Feb 2018, 18:41

                The release build show no crashes. I honestly don't want to know what was going on there (even though I was using QFileDialog so k's answer was probably correct. Thanks for the help everyone

                K Offline
                K Offline
                kshegunov
                Moderators
                wrote on 1 Feb 2018, 20:07 last edited by
                #7

                Out of curiosity, did using Qt's non-native file dialog show a problem of the kind?

                Read and abide by the Qt Code of Conduct

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                29 Jan 2018, 12:50

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