Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. My app keeps crashing and i've never used the Debugger befor!
Qt 6.11 is out! See what's new in the release blog

My app keeps crashing and i've never used the Debugger befor!

Scheduled Pinned Locked Moved Unsolved General and Desktop
19 Posts 2 Posters 1.6k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • mrjjM mrjj

    Hi
    It's hard to guess at, but maybe the rt is null and hence it crashes asking for ->d

    In the call stack, it seems to be inside Qt
    but if you scroll to the button some of your code should be shown
    alt text

    Such crashes normally comes from openGl issues.

    Can you run any of the QML or openGl examples that comes with Creator ?

    K Offline
    K Offline
    Kris Revi
    wrote on last edited by
    #3

    @mrjj but if you scroll to the button some of your code should be shown
    im confused here :P button?

    mrjjM 1 Reply Last reply
    0
    • K Kris Revi

      @mrjj but if you scroll to the button some of your code should be shown
      im confused here :P button?

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #4

      @Kris-Revi
      sorry fat fingers. :)
      To the bottom. The scrollbar can be dragged more down to see the start of the call stack.

      1 Reply Last reply
      0
      • K Offline
        K Offline
        Kris Revi
        wrote on last edited by
        #5

        This?

        f7e31d6d-40a6-4358-9513-d00113434aaa-image.png

        mrjjM 1 Reply Last reply
        0
        • K Kris Revi

          This?

          f7e31d6d-40a6-4358-9513-d00113434aaa-image.png

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by
          #6

          @Kris-Revi
          Yes but it didnt show anything interesting.
          Do you call FullScreen any where ?
          seems to start there.

          Also, does other examples work ?
          Could be openGL setup that is messed up.

          K 1 Reply Last reply
          0
          • mrjjM mrjj

            @Kris-Revi
            Yes but it didnt show anything interesting.
            Do you call FullScreen any where ?
            seems to start there.

            Also, does other examples work ?
            Could be openGL setup that is messed up.

            K Offline
            K Offline
            Kris Revi
            wrote on last edited by
            #7

            @mrjj weird hmmm so i found the bit of code that was the cause!

                const QScreen* screen = qApp->primaryScreen();
                w.setGeometry( QRect(QPoint(0,0), screen->geometry().size()) );
                w.setWindowFlag(Qt::MaximizeUsingFullscreenGeometryHint,true);
            
                w.showFullScreen();
            

            but when i now run my App it's loading and "running" but no window comes up :S

            mrjjM 1 Reply Last reply
            1
            • K Kris Revi

              @mrjj weird hmmm so i found the bit of code that was the cause!

                  const QScreen* screen = qApp->primaryScreen();
                  w.setGeometry( QRect(QPoint(0,0), screen->geometry().size()) );
                  w.setWindowFlag(Qt::MaximizeUsingFullscreenGeometryHint,true);
              
                  w.showFullScreen();
              

              but when i now run my App it's loading and "running" but no window comes up :S

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #8

              @Kris-Revi
              Did you remove the fullscreen or how did you make it run ?

              Try with
              w.show()

              K 1 Reply Last reply
              0
              • mrjjM mrjj

                @Kris-Revi
                Did you remove the fullscreen or how did you make it run ?

                Try with
                w.show()

                K Offline
                K Offline
                Kris Revi
                wrote on last edited by
                #9

                @mrjj so i added w.show(); and ran the debugger again and got this
                5b90eb88-8a23-4998-a7ab-c04894bad95e-image.png

                mrjjM 1 Reply Last reply
                0
                • K Kris Revi

                  @mrjj so i added w.show(); and ran the debugger again and got this
                  5b90eb88-8a23-4998-a7ab-c04894bad95e-image.png

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #10

                  @Kris-Revi

                  Ok so it is when it tries to show the render surface.

                  You have to try some of the openGl examples and see.

                  I guess its your openGL since it seems to crash on showing.

                  https://doc.qt.io/qt-5/qtopengl-hellogl2-example.html

                  They are available directly in creator.

                  K 2 Replies Last reply
                  0
                  • mrjjM mrjj

                    @Kris-Revi

                    Ok so it is when it tries to show the render surface.

                    You have to try some of the openGl examples and see.

                    I guess its your openGL since it seems to crash on showing.

                    https://doc.qt.io/qt-5/qtopengl-hellogl2-example.html

                    They are available directly in creator.

                    K Offline
                    K Offline
                    Kris Revi
                    wrote on last edited by
                    #11

                    @mrjj so i just ran that example and it worked without problems

                    mrjjM 1 Reply Last reply
                    0
                    • mrjjM mrjj

                      @Kris-Revi

                      Ok so it is when it tries to show the render surface.

                      You have to try some of the openGl examples and see.

                      I guess its your openGL since it seems to crash on showing.

                      https://doc.qt.io/qt-5/qtopengl-hellogl2-example.html

                      They are available directly in creator.

                      K Offline
                      K Offline
                      Kris Revi
                      wrote on last edited by Kris Revi
                      #12

                      @mrjj i just noticed this

                      QQuickWidget is only supported on OpenGL. Use QQuickWindow::setGraphicsApi() to override the default.

                      could this be it?

                      1 Reply Last reply
                      0
                      • K Kris Revi

                        @mrjj so i just ran that example and it worked without problems

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by
                        #13

                        @Kris-Revi

                        Hi
                        yes it could very well as normally Desktop is using openGl and mobile some other ES? but
                        normally it's automatic.

                        This is a Desktop pc windows right ?

                        Did you compile Qt your self ?

                        Maybe its a Qt6 thing. try setting it to openGl via the setGraphicsApi as it says and then see.

                        K 1 Reply Last reply
                        0
                        • mrjjM mrjj

                          @Kris-Revi

                          Hi
                          yes it could very well as normally Desktop is using openGl and mobile some other ES? but
                          normally it's automatic.

                          This is a Desktop pc windows right ?

                          Did you compile Qt your self ?

                          Maybe its a Qt6 thing. try setting it to openGl via the setGraphicsApi as it says and then see.

                          K Offline
                          K Offline
                          Kris Revi
                          wrote on last edited by
                          #14

                          @mrjj yea it's for desktop now :) 6.2.0 but im compiling for both Android and Desktop in same project! and wanted to test the App on the Desktop

                          mrjjM 1 Reply Last reply
                          0
                          • K Kris Revi

                            @mrjj yea it's for desktop now :) 6.2.0 but im compiling for both Android and Desktop in same project! and wanted to test the App on the Desktop

                            mrjjM Offline
                            mrjjM Offline
                            mrjj
                            Lifetime Qt Champion
                            wrote on last edited by
                            #15

                            @Kris-Revi

                            Can it be that on startup some other API is set ?
                            Or you added some defines to .pro so it thinks its Android ?

                            K 2 Replies Last reply
                            0
                            • mrjjM mrjj

                              @Kris-Revi

                              Can it be that on startup some other API is set ?
                              Or you added some defines to .pro so it thinks its Android ?

                              K Offline
                              K Offline
                              Kris Revi
                              wrote on last edited by
                              #16

                              @mrjj so the App works perfectly with QQuickWindow::setGraphicsApi(QSGRendererInterface::OpenGL); weird why i would need to set that tho :S hmmm

                              1 Reply Last reply
                              0
                              • mrjjM mrjj

                                @Kris-Revi

                                Can it be that on startup some other API is set ?
                                Or you added some defines to .pro so it thinks its Android ?

                                K Offline
                                K Offline
                                Kris Revi
                                wrote on last edited by
                                #17

                                @mrjj question in the pro file can't i do this

                                win32
                                {
                                    CONFIG(release, debug|release): LIBS += -LC:\QMsgPack\bin -lqmsgpack
                                    INCLUDEPATH += C:\QMsgPack\bin
                                    DEPENDPATH += C:\QMsgPack\bin
                                }
                                
                                win32
                                {
                                    CONFIG(debug, debug|release): LIBS += -LC:\QMsgPack\bin -lqmsgpack
                                    INCLUDEPATH += C:\QMsgPack\bin
                                    DEPENDPATH += C:\QMsgPack\bin
                                }
                                unix
                                {
                                    contains(ANDROID_TARGET_ARCH,arm64-v8a)
                                    {
                                        ANDROID_PACKAGE_SOURCE_DIR = \
                                           $$PWD/android
                                
                                        ANDROID_EXTRA_LIBS = \
                                            $$PWD/android/libs/libqmsgpack_arm64-v8a.so
                                    }
                                    LIBS += -L$$PWD/android/libs/ -lqmsgpack_arm64-v8a
                                
                                    INCLUDEPATH += $$PWD/android/libs
                                    DEPENDPATH += $$PWD/android/libs
                                }
                                

                                ? :S

                                mrjjM 1 Reply Last reply
                                0
                                • K Kris Revi

                                  @mrjj question in the pro file can't i do this

                                  win32
                                  {
                                      CONFIG(release, debug|release): LIBS += -LC:\QMsgPack\bin -lqmsgpack
                                      INCLUDEPATH += C:\QMsgPack\bin
                                      DEPENDPATH += C:\QMsgPack\bin
                                  }
                                  
                                  win32
                                  {
                                      CONFIG(debug, debug|release): LIBS += -LC:\QMsgPack\bin -lqmsgpack
                                      INCLUDEPATH += C:\QMsgPack\bin
                                      DEPENDPATH += C:\QMsgPack\bin
                                  }
                                  unix
                                  {
                                      contains(ANDROID_TARGET_ARCH,arm64-v8a)
                                      {
                                          ANDROID_PACKAGE_SOURCE_DIR = \
                                             $$PWD/android
                                  
                                          ANDROID_EXTRA_LIBS = \
                                              $$PWD/android/libs/libqmsgpack_arm64-v8a.so
                                      }
                                      LIBS += -L$$PWD/android/libs/ -lqmsgpack_arm64-v8a
                                  
                                      INCLUDEPATH += $$PWD/android/libs
                                      DEPENDPATH += $$PWD/android/libs
                                  }
                                  

                                  ? :S

                                  mrjjM Offline
                                  mrjjM Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #18

                                  @Kris-Revi
                                  Yes that seems perfect. should not interfere with which backend is used.

                                  I cant tell either. Did you use any new Qt6 things ?
                                  Could be fun to see if it does the same say in 5.12

                                  K 1 Reply Last reply
                                  0
                                  • mrjjM mrjj

                                    @Kris-Revi
                                    Yes that seems perfect. should not interfere with which backend is used.

                                    I cant tell either. Did you use any new Qt6 things ?
                                    Could be fun to see if it does the same say in 5.12

                                    K Offline
                                    K Offline
                                    Kris Revi
                                    wrote on last edited by
                                    #19

                                    @mrjj for some reason with the code above it does this

                                    6912ccb5-dad8-42bc-9ff0-a0f5259f3860-image.png

                                    i've selected the Desktop but it is trying to find the "arm / android" version :S

                                    1 Reply Last reply
                                    0

                                    • Login

                                    • Login or register to search.
                                    • First post
                                      Last post
                                    0
                                    • Categories
                                    • Recent
                                    • Tags
                                    • Popular
                                    • Users
                                    • Groups
                                    • Search
                                    • Get Qt Extensions
                                    • Unsolved