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QtCreator crashed and now will not start due to segfault

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  • T TMcSquared
    9 Aug 2018, 19:20

    already did that.

    M Offline
    M Offline
    mrjj
    Lifetime Qt Champion
    wrote on 9 Aug 2018, 19:28 last edited by
    #19

    @TMcSquared
    Best guess is that it gets wrong QtDLLs maybe via
    path.

    1 Reply Last reply
    1
    • T Offline
      T Offline
      TMcSquared
      wrote on 9 Aug 2018, 20:30 last edited by
      #20

      My PATH variable has zero Qt paths in it. even after a clean install.

      M 1 Reply Last reply 9 Aug 2018, 20:32
      0
      • T TMcSquared
        9 Aug 2018, 20:30

        My PATH variable has zero Qt paths in it. even after a clean install.

        M Offline
        M Offline
        mrjj
        Lifetime Qt Champion
        wrote on 9 Aug 2018, 20:32 last edited by
        #21

        @TMcSquared
        I have no idea then.
        last test
        can you start with
        qtcreator -noload Welcome -noload QmlDesigner -noload QmlProfiler
        from shell and see if still crash ?

        T 1 Reply Last reply 9 Aug 2018, 20:51
        2
        • M mrjj
          9 Aug 2018, 20:32

          @TMcSquared
          I have no idea then.
          last test
          can you start with
          qtcreator -noload Welcome -noload QmlDesigner -noload QmlProfiler
          from shell and see if still crash ?

          T Offline
          T Offline
          TMcSquared
          wrote on 9 Aug 2018, 20:51 last edited by
          #22

          :O It opened with qtcreator -noload Welcome -noload QmlDesigner -noload QmlProfiler

          1 Reply Last reply
          1
          • S Offline
            S Offline
            SGaist
            Lifetime Qt Champion
            wrote on 9 Aug 2018, 20:52 last edited by
            #23

            Hi,

            Then it sounds like a graphic driver issue then. Are you sure there wasn't any modification in that regard on your machine ?

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

            1 Reply Last reply
            3
            • T TMcSquared
              9 Aug 2018, 16:55

              Hmm I'll try adding it to the PATH xD

              EDIT: that didn't work

              J Offline
              J Offline
              JonB
              wrote on 9 Aug 2018, 20:55 last edited by JonB 8 Sept 2018, 20:56
              #24

              @TMcSquared
              You could check whether Windows Update snuck in and did anything since it last worked... :)

              1 Reply Last reply
              0
              • T Offline
                T Offline
                TMcSquared
                wrote on 9 Aug 2018, 21:23 last edited by TMcSquared 8 Sept 2018, 21:24
                #25

                That's completely possible, thanks for your guy's help!
                @SGaist I have no idea, it quit working while I was logged in.

                1 Reply Last reply
                1
                • N Offline
                  N Offline
                  nwoki
                  wrote on 19 Oct 2018, 11:10 last edited by
                  #26

                  Hi all. Sorry to revive this topic but this problem has occurred to me as well but on an application I wrote for a client. The application was running fine. Then it crashed (just like @TMcSquared ) and hasn't opened since.
                  My access violation is in the QtWidgets.dll module.

                  Any clues? (i don't have the welcome/QmlDesigner/etc modules to disable on load as does qtcreatorI)

                  M 1 Reply Last reply 19 Oct 2018, 11:24
                  0
                  • N nwoki
                    19 Oct 2018, 11:10

                    Hi all. Sorry to revive this topic but this problem has occurred to me as well but on an application I wrote for a client. The application was running fine. Then it crashed (just like @TMcSquared ) and hasn't opened since.
                    My access violation is in the QtWidgets.dll module.

                    Any clues? (i don't have the welcome/QmlDesigner/etc modules to disable on load as does qtcreatorI)

                    M Offline
                    M Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on 19 Oct 2018, 11:24 last edited by
                    #27

                    @nwoki
                    Hi
                    Do you use QML?
                    if yes, could be a driver issue.

                    Do you have data files?
                    if yes, it could be damaged data files crashing app on load.

                    It could be client installed other app using Qt dlls and now your app finds the wrong version of Qt dll.

                    Buts its nearly impossible to guess on without far more concrete information :)

                    N 1 Reply Last reply 19 Oct 2018, 12:06
                    0
                    • M mrjj
                      19 Oct 2018, 11:24

                      @nwoki
                      Hi
                      Do you use QML?
                      if yes, could be a driver issue.

                      Do you have data files?
                      if yes, it could be damaged data files crashing app on load.

                      It could be client installed other app using Qt dlls and now your app finds the wrong version of Qt dll.

                      Buts its nearly impossible to guess on without far more concrete information :)

                      N Offline
                      N Offline
                      nwoki
                      wrote on 19 Oct 2018, 12:06 last edited by
                      #28

                      @mrjj said in QtCreator crashed and now will not start due to segfault:

                      @nwoki
                      Hi
                      Do you use QML?
                      if yes, could be a driver issue.

                      This is reproducable only on the client pc. Any way I can debug this?

                      Do you have data files?
                      if yes, it could be damaged data files crashing app on load.

                      Cleaned and still no dice

                      It could be client installed other app using Qt dlls and now your app finds the wrong version of Qt dll.

                      No other Qt applications are installed

                      Buts its nearly impossible to guess on without far more concrete information :)

                      Any idea on how I can help gather more info for furthur debugging?

                      M 1 Reply Last reply 19 Oct 2018, 12:16
                      0
                      • N nwoki
                        19 Oct 2018, 12:06

                        @mrjj said in QtCreator crashed and now will not start due to segfault:

                        @nwoki
                        Hi
                        Do you use QML?
                        if yes, could be a driver issue.

                        This is reproducable only on the client pc. Any way I can debug this?

                        Do you have data files?
                        if yes, it could be damaged data files crashing app on load.

                        Cleaned and still no dice

                        It could be client installed other app using Qt dlls and now your app finds the wrong version of Qt dll.

                        No other Qt applications are installed

                        Buts its nearly impossible to guess on without far more concrete information :)

                        Any idea on how I can help gather more info for furthur debugging?

                        M Offline
                        M Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on 19 Oct 2018, 12:16 last edited by
                        #29

                        Hi

                        This is reproducible only on the client pc. Any way I can debug this?
                        Not really. you can ask him to update drivers and also
                        collect information about opengl version supported.
                        I take it, the project does use QML?

                        Any idea on how I can help gather more info for furthur debugging?

                        Well, i would add some logging to the app.
                        So you can see if dies before main.
                        That will give a hint if its related to actual user code or a DLL issue.

                        N 1 Reply Last reply 19 Oct 2018, 13:18
                        0
                        • M mrjj
                          19 Oct 2018, 12:16

                          Hi

                          This is reproducible only on the client pc. Any way I can debug this?
                          Not really. you can ask him to update drivers and also
                          collect information about opengl version supported.
                          I take it, the project does use QML?

                          Any idea on how I can help gather more info for furthur debugging?

                          Well, i would add some logging to the app.
                          So you can see if dies before main.
                          That will give a hint if its related to actual user code or a DLL issue.

                          N Offline
                          N Offline
                          nwoki
                          wrote on 19 Oct 2018, 13:18 last edited by
                          #30

                          @mrjj doesn't even start, so adding any logging is futile. Double click on app -> immediate crash. I can see the crash errors in the windows EventViewer

                          M 1 Reply Last reply 19 Oct 2018, 14:18
                          0
                          • N nwoki
                            19 Oct 2018, 13:18

                            @mrjj doesn't even start, so adding any logging is futile. Double click on app -> immediate crash. I can see the crash errors in the windows EventViewer

                            M Offline
                            M Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on 19 Oct 2018, 14:18 last edited by
                            #31

                            @nwoki
                            Hi
                            and there is no code in main.cpp that could crash it ?
                            that is 100% for sure ?

                            Then it really sounds like DLL issue.

                            Do you know what happens to client pc between app working and crashing ?
                            Windows update or anything like that ?

                            N 1 Reply Last reply 19 Oct 2018, 15:03
                            0
                            • M mrjj
                              19 Oct 2018, 14:18

                              @nwoki
                              Hi
                              and there is no code in main.cpp that could crash it ?
                              that is 100% for sure ?

                              Then it really sounds like DLL issue.

                              Do you know what happens to client pc between app working and crashing ?
                              Windows update or anything like that ?

                              N Offline
                              N Offline
                              nwoki
                              wrote on 19 Oct 2018, 15:03 last edited by nwoki
                              #32

                              @mrjj said in QtCreator crashed and now will not start due to segfault:

                              @nwoki
                              Hi
                              and there is no code in main.cpp that could crash it ?
                              that is 100% for sure ?

                              This is the main.cpp

                              int main(int argc, char *argv[])
                              {
                                  QLocale::setDefault(QLocale::c());
                              
                                  // Test fix
                              #ifdef Q_OS_WIN
                              //    QApplication::setAttribute(Qt::AA_UseSoftwareOpenGL);
                              //    QApplication::setAttribute(Qt::AA_UseDesktopOpenGL);
                              //    QApplication::setAttribute(Qt::AA_UseOpenGLES);
                              #endif
                                  // ----------
                              
                                  QApplication a(argc, argv);
                              
                                  QApplication::setOrganizationName("Organization");
                                  QApplication::setOrganizationDomain("organization.com/");
                                  QApplication::setApplicationName("MyAppName");
                              
                                  // Setup QML
                                  qmlRegisterType<CommunicationCenter>("com.organization.myappname", 1, 0, "CommunicationCenter");
                              
                                  PasswordRequestDialog pwdReqDialog;
                                  MainWindow w(&a);
                              
                                  // is a password set?
                                  if (PasswordManager::isPasswordSet()) {
                                      pwdReqDialog.show();
                              
                                      QObject::connect(&pwdReqDialog, &PasswordRequestDialog::passwordAccepted, [&w] () {
                                          w.show();
                                      });
                                  } else {
                                      w.show();
                                  }
                              
                                  // don't need to do anything on the "rejected" signal. We just exit the application
                              
                                  return a.exec();
                              

                              Then it really sounds like DLL issue.

                              Do you know what happens to client pc between app working and crashing ?
                              Windows update or anything like that ?

                              Don't know. The client said "I didn't do anything. It just stopped working..". What dlls are problematic? I find it strange that the app is working one day and just stops the next.

                              M 1 Reply Last reply 19 Oct 2018, 15:34
                              0
                              • N nwoki
                                19 Oct 2018, 15:03

                                @mrjj said in QtCreator crashed and now will not start due to segfault:

                                @nwoki
                                Hi
                                and there is no code in main.cpp that could crash it ?
                                that is 100% for sure ?

                                This is the main.cpp

                                int main(int argc, char *argv[])
                                {
                                    QLocale::setDefault(QLocale::c());
                                
                                    // Test fix
                                #ifdef Q_OS_WIN
                                //    QApplication::setAttribute(Qt::AA_UseSoftwareOpenGL);
                                //    QApplication::setAttribute(Qt::AA_UseDesktopOpenGL);
                                //    QApplication::setAttribute(Qt::AA_UseOpenGLES);
                                #endif
                                    // ----------
                                
                                    QApplication a(argc, argv);
                                
                                    QApplication::setOrganizationName("Organization");
                                    QApplication::setOrganizationDomain("organization.com/");
                                    QApplication::setApplicationName("MyAppName");
                                
                                    // Setup QML
                                    qmlRegisterType<CommunicationCenter>("com.organization.myappname", 1, 0, "CommunicationCenter");
                                
                                    PasswordRequestDialog pwdReqDialog;
                                    MainWindow w(&a);
                                
                                    // is a password set?
                                    if (PasswordManager::isPasswordSet()) {
                                        pwdReqDialog.show();
                                
                                        QObject::connect(&pwdReqDialog, &PasswordRequestDialog::passwordAccepted, [&w] () {
                                            w.show();
                                        });
                                    } else {
                                        w.show();
                                    }
                                
                                    // don't need to do anything on the "rejected" signal. We just exit the application
                                
                                    return a.exec();
                                

                                Then it really sounds like DLL issue.

                                Do you know what happens to client pc between app working and crashing ?
                                Windows update or anything like that ?

                                Don't know. The client said "I didn't do anything. It just stopped working..". What dlls are problematic? I find it strange that the app is working one day and just stops the next.

                                M Offline
                                M Offline
                                mrjj
                                Lifetime Qt Champion
                                wrote on 19 Oct 2018, 15:34 last edited by
                                #33

                                @nwoki
                                well, i would first check if his openGL is (still) working.
                                Normally crash like this can happen if any other Qt dll are present in the system path
                                and it loads that instead of the one
                                in app folder.
                                It can also be unexpected version of mingw/ visual studio runtime or
                                any DLL that has unexpected version.

                                If possible, i would send him a test exe that is just an empty QT GUI app.
                                If that doesn't crashes, it means its not one of the Qt dlls.

                                And yes, i agree taht normally apps just dont stop, so something has happens to his windows.

                                N 1 Reply Last reply 22 Oct 2018, 14:42
                                0
                                • M mrjj
                                  19 Oct 2018, 15:34

                                  @nwoki
                                  well, i would first check if his openGL is (still) working.
                                  Normally crash like this can happen if any other Qt dll are present in the system path
                                  and it loads that instead of the one
                                  in app folder.
                                  It can also be unexpected version of mingw/ visual studio runtime or
                                  any DLL that has unexpected version.

                                  If possible, i would send him a test exe that is just an empty QT GUI app.
                                  If that doesn't crashes, it means its not one of the Qt dlls.

                                  And yes, i agree taht normally apps just dont stop, so something has happens to his windows.

                                  N Offline
                                  N Offline
                                  nwoki
                                  wrote on 22 Oct 2018, 14:42 last edited by
                                  #34

                                  @mrjj said in QtCreator crashed and now will not start due to segfault:

                                  @nwoki
                                  well, i would first check if his openGL is (still) working.
                                  Normally crash like this can happen if any other Qt dll are present in the system path
                                  and it loads that instead of the one
                                  in app folder.
                                  It can also be unexpected version of mingw/ visual studio runtime or
                                  any DLL that has unexpected version.

                                  If possible, i would send him a test exe that is just an empty QT GUI app.
                                  If that doesn't crashes, it means its not one of the Qt dlls.

                                  And yes, i agree taht normally apps just dont stop, so something has happens to his windows.

                                  Sorry about the delay, had some problems with the visual studio compiler and libs. I created a test app (simple empty gui as suggested) and launched it from the same folder of the application that won't run. It works. So now what does this mean?

                                  M 1 Reply Last reply 22 Oct 2018, 19:55
                                  0
                                  • N nwoki
                                    22 Oct 2018, 14:42

                                    @mrjj said in QtCreator crashed and now will not start due to segfault:

                                    @nwoki
                                    well, i would first check if his openGL is (still) working.
                                    Normally crash like this can happen if any other Qt dll are present in the system path
                                    and it loads that instead of the one
                                    in app folder.
                                    It can also be unexpected version of mingw/ visual studio runtime or
                                    any DLL that has unexpected version.

                                    If possible, i would send him a test exe that is just an empty QT GUI app.
                                    If that doesn't crashes, it means its not one of the Qt dlls.

                                    And yes, i agree taht normally apps just dont stop, so something has happens to his windows.

                                    Sorry about the delay, had some problems with the visual studio compiler and libs. I created a test app (simple empty gui as suggested) and launched it from the same folder of the application that won't run. It works. So now what does this mean?

                                    M Offline
                                    M Offline
                                    mrjj
                                    Lifetime Qt Champion
                                    wrote on 22 Oct 2018, 19:55 last edited by
                                    #35

                                    @nwoki
                                    Hi
                                    It means even it reports thats its QtWidgets that crashes, its likely not that DLL
                                    if a plain empty GUI project works. ( for exact same folder , same pc)
                                    I would next add some openGL to the test project see if it still runs.
                                    As it seems might be direclt related to Qt ( like wrong Qt dll loaded)
                                    so it could be the openGL for clients gfx card.

                                    1 Reply Last reply
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