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comboBox->additem() crash application..

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  • V VRonin
    8 Nov 2018, 18:34

    One more try, add QObject::connect(this,&QObject::destroyed,[]()->void{qDebug("Something big exploded");}); and see if you have any output when you crash the application

    T Offline
    T Offline
    TheCipo76
    wrote on 8 Nov 2018, 18:50 last edited by
    #17

    @VRonin said in comboBox->additem() crash application..:

    QObject::connect(this,&QObject::destroyed,->void{qDebug("Something big exploded");});

    no, i don't see any output..

    1 Reply Last reply
    0
    • V Offline
      V Offline
      VRonin
      wrote on 8 Nov 2018, 18:54 last edited by VRonin 11 Aug 2018, 19:14
      #18

      This is turning into a mistery now. Can you post the stack trace at the moment of crash?

      "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

      T 1 Reply Last reply 8 Nov 2018, 19:51
      2
      • T TheCipo76
        8 Nov 2018, 17:46

        @Cobra91151

        in application output :

        18:45:34: The process was ended forcefully.
        18:45:34: /Users/matteo/Desktop/C++/QT/EasyGest/build-EasyGest-Desktop_Qt_5_11_2_clang_64bit18-Release/EasyGest.app/Contents/MacOS/EasyGest crashed.

        C Offline
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        Cobra91151
        wrote on 8 Nov 2018, 19:35 last edited by Cobra91151 11 Aug 2018, 19:35
        #19

        @TheCipo76

        This crash happens after you addItem() to the ui->comboBox_Cliente?

        Try to change the code to:

        if (cl.exec()) {
            msg.setText("QUI");
            msg.exec();
        
            if (cl.first()) {
                 msg.setText("OK");
                 msg.exec();
            }
        
            do {
                ui->comboBox_Cliente->addItem(cl.value(0).toString());
            } while (cl.next());
         }
        

        and check if it still crashes?

        1 Reply Last reply
        0
        • T TheCipo76
          8 Nov 2018, 16:46

          Hi,
          i've populated from database n.1 comboBox and all is OK

          if i click on Annulla pushbutton (this is the code):

          void inserisciarticolo::on_pushButton_Annulla_clicked()
          {
              // ANNULLA
              if (aDatabase.open()) {
                  aDatabase.close();
              }
              close();
          }
          

          and try to re-load the dialog (from application menu)

          after first record of database additem() crashes the application

          if i comment the additem() all works

          this is the code i've used to load the comboBox data:

          QSqlQuery cl;
              cl.prepare("Select RAGSOC from CLIENTI order by RAGSOC ASC");
              ui->comboBox_Cliente->clear();
              if (cl.exec()) {
                  cl.first();
                  do {
                      ui->comboBox_Cliente->addItem(cl.value(0).toString());
                  } while (cl.next());
              }
          

          ideas??

          Thanks in advance.

          J Offline
          J Offline
          JonB
          wrote on 8 Nov 2018, 19:44 last edited by JonB 11 Aug 2018, 19:47
          #20

          @TheCipo76

          after first record of database additem() crashes the application

          Has nobody yet asked you to run this in a debugger (e.g. from Qt Creator)? And give us the stacktrace? EDIT: Oh, @VRonin has 2 posts above. Please do so!

          1 Reply Last reply
          1
          • V VRonin
            8 Nov 2018, 18:54

            This is turning into a mistery now. Can you post the stack trace at the moment of crash?

            T Offline
            T Offline
            TheCipo76
            wrote on 8 Nov 2018, 19:51 last edited by
            #21

            @VRonin you mean the os x crash report??

            V J 2 Replies Last reply 8 Nov 2018, 19:59
            0
            • T TheCipo76
              8 Nov 2018, 19:51

              @VRonin you mean the os x crash report??

              V Offline
              V Offline
              VRonin
              wrote on 8 Nov 2018, 19:59 last edited by
              #22

              @TheCipo76 said in comboBox->additem() crash application..:

              you mean the os x crash report??

              Nope, the stack trace which is a log of all the functions called up to the point of crash. If you use Qt Creator, see http://doc.qt.io/qtcreator/creator-debug-mode.html#viewing-call-stack-trace

              "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

              1 Reply Last reply
              2
              • T TheCipo76
                8 Nov 2018, 19:51

                @VRonin you mean the os x crash report??

                J Offline
                J Offline
                JonB
                wrote on 8 Nov 2018, 20:00 last edited by JonB 11 Aug 2018, 20:00
                #23

                @TheCipo76
                Do you sit inside Qt Creator and run your app from within there via the debugger? We are expecting that when something "crashes", the debugger will catch that and show a stacktrace of exactly where it was in your code.

                1 Reply Last reply
                2
                • T Offline
                  T Offline
                  TheCipo76
                  wrote on 8 Nov 2018, 20:23 last edited by
                  #24

                  1 QLineEdit::setText(QString const&) 0x1003727e8
                  2 inserisciarticolo::on_comboBox_Cliente_currentTextChanged(QString const&) inserisciarticolo.cpp 497 0x10003ce05
                  3 inserisciarticolo::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *) moc_inserisciarticolo.cpp 92 0x10008ec0d
                  4 inserisciarticolo::qt_metacall(QMetaObject::Call, int, void * *) moc_inserisciarticolo.cpp 124 0x10008eda5
                  5 QMetaObject::activate(QObject *, int, int, void * *) 0x100edf7d6
                  6 QComboBoxPrivate::_q_emitCurrentIndexChanged(QModelIndex const&) 0x100332724
                  7 QComboBoxPrivate::setCurrentIndex(QModelIndex const&) 0x100337121
                  8 QComboBoxPrivate::_q_rowsInserted(QModelIndex const&, int, int) 0x100336048
                  9 QMetaObject::activate(QObject *, int, int, void * *) 0x100edfaaa
                  10 QAbstractItemModel::endInsertRows() 0x100e697f2
                  11 QStandardItemPrivate::insertRows(int, int, QList<QStandardItem *> const&) 0x100b043ca
                  12 QComboBox::insertItem(int, QIcon const&, QString const&, QVariant const&) 0x1003389fc
                  13 QComboBox::insertItem(int, QString const&, QVariant const&) qcombobox.h 279 0x10002106d
                  14 QComboBox::addItem(QString const&, QVariant const&) qcombobox.h 272 0x100017aa7
                  15 inserisciarticolo::inserisciarticolo(QWidget *, QString const&, QString const&) inserisciarticolo.cpp 70 0x1000337d8
                  16 inserisciarticolo::inserisciarticolo(QWidget *, QString const&, QString const&) inserisciarticolo.cpp 19 0x100038c4d
                  17 MainWindow::on_action_InsArticolo_triggered() mainwindow.cpp 100 0x100008ae8
                  18 MainWindow::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *) moc_mainwindow.cpp 162 0x10008d839
                  19 MainWindow::qt_metacall(QMetaObject::Call, int, void * *) moc_mainwindow.cpp 214 0x10008db45
                  20 QMetaObject::activate(QObject *, int, int, void * *) 0x100edf7d6
                  21 QAction::activate(QAction::ActionEvent) 0x10022d615
                  22 QMenuPrivate::activateCausedStack(QVector<QPointer<QWidget>> const&, QAction *, QAction::ActionEvent, bool) 0x1003b010f
                  23 QMenuPrivate::activateAction(QAction *, QAction::ActionEvent, bool) 0x1003ad6c4
                  24 QWidget::event(QEvent *) 0x100271050
                  25 QMenu::event(QEvent *) 0x1003b53c2
                  26 QApplicationPrivate::notify_helper(QObject *, QEvent *) 0x100236d32
                  27 QApplication::notify(QObject *, QEvent *) 0x100239b8d
                  28 QCoreApplication::notifyInternal2(QObject *, QEvent *) 0x100eae85f
                  29 QApplicationPrivate::sendMouseEvent(QWidget *, QMouseEvent *, QWidget *, QWidget *, QWidget * *, QPointer<QWidget>&, bool) 0x100237660
                  30 QWidgetWindow::handleMouseEvent(QMouseEvent *) 0x1002913a1
                  31 QWidgetWindow::event(QEvent *) 0x10028fe60
                  32 QApplicationPrivate::notify_helper(QObject *, QEvent *) 0x100236d32
                  33 QApplication::notify(QObject *, QEvent *) 0x10023810d
                  34 QCoreApplication::notifyInternal2(QObject *, QEvent *) 0x100eae85f
                  35 QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent *) 0x1007ec094
                  36 QWindowSystemInterface::sendWindowSystemEvents(QFlagsQEventLoop::ProcessEventsFlag) 0x1007d3d4b
                  37 QCocoaEventDispatcherPrivate::postedEventsSourceCallback(void *) 0x105a0faf1
                  38 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION 0x7fff3be90155
                  39 __CFRunLoopDoSource0 0x7fff3be900fb
                  40 __CFRunLoopDoSources0 0x7fff3be73b95
                  41 __CFRunLoopRun 0x7fff3be7313e
                  42 CFRunLoopRunSpecific 0x7fff3be72a28
                  43 RunCurrentEventLoopInMode 0x7fff3b10bb35
                  44 ReceiveNextEventCommon 0x7fff3b10b774
                  45 _BlockUntilNextEventMatchingListInModeWithFilter 0x7fff3b10b5e8
                  46 _DPSNextEvent 0x7fff393c7eb7
                  47 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] 0x7fff393c6c56
                  48 -[NSApplication run] 0x7fff393c0cb9
                  49 QCocoaEventDispatcher::processEvents(QFlagsQEventLoop::ProcessEventsFlag) 0x105a0e8ed
                  50 QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) 0x100eaa3b2
                  51 QCoreApplication::exec() 0x100eaef72
                  52 main main.cpp 11 0x100003b54
                  53 start 0x7fff6905508d

                  J 1 Reply Last reply 8 Nov 2018, 20:32
                  0
                  • S Offline
                    S Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on 8 Nov 2018, 20:24 last edited by
                    #25

                    The macOS crash report should also contain useful information in that regard so you can post it.

                    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
                    0
                    • T TheCipo76
                      8 Nov 2018, 20:23

                      1 QLineEdit::setText(QString const&) 0x1003727e8
                      2 inserisciarticolo::on_comboBox_Cliente_currentTextChanged(QString const&) inserisciarticolo.cpp 497 0x10003ce05
                      3 inserisciarticolo::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *) moc_inserisciarticolo.cpp 92 0x10008ec0d
                      4 inserisciarticolo::qt_metacall(QMetaObject::Call, int, void * *) moc_inserisciarticolo.cpp 124 0x10008eda5
                      5 QMetaObject::activate(QObject *, int, int, void * *) 0x100edf7d6
                      6 QComboBoxPrivate::_q_emitCurrentIndexChanged(QModelIndex const&) 0x100332724
                      7 QComboBoxPrivate::setCurrentIndex(QModelIndex const&) 0x100337121
                      8 QComboBoxPrivate::_q_rowsInserted(QModelIndex const&, int, int) 0x100336048
                      9 QMetaObject::activate(QObject *, int, int, void * *) 0x100edfaaa
                      10 QAbstractItemModel::endInsertRows() 0x100e697f2
                      11 QStandardItemPrivate::insertRows(int, int, QList<QStandardItem *> const&) 0x100b043ca
                      12 QComboBox::insertItem(int, QIcon const&, QString const&, QVariant const&) 0x1003389fc
                      13 QComboBox::insertItem(int, QString const&, QVariant const&) qcombobox.h 279 0x10002106d
                      14 QComboBox::addItem(QString const&, QVariant const&) qcombobox.h 272 0x100017aa7
                      15 inserisciarticolo::inserisciarticolo(QWidget *, QString const&, QString const&) inserisciarticolo.cpp 70 0x1000337d8
                      16 inserisciarticolo::inserisciarticolo(QWidget *, QString const&, QString const&) inserisciarticolo.cpp 19 0x100038c4d
                      17 MainWindow::on_action_InsArticolo_triggered() mainwindow.cpp 100 0x100008ae8
                      18 MainWindow::qt_static_metacall(QObject *, QMetaObject::Call, int, void * *) moc_mainwindow.cpp 162 0x10008d839
                      19 MainWindow::qt_metacall(QMetaObject::Call, int, void * *) moc_mainwindow.cpp 214 0x10008db45
                      20 QMetaObject::activate(QObject *, int, int, void * *) 0x100edf7d6
                      21 QAction::activate(QAction::ActionEvent) 0x10022d615
                      22 QMenuPrivate::activateCausedStack(QVector<QPointer<QWidget>> const&, QAction *, QAction::ActionEvent, bool) 0x1003b010f
                      23 QMenuPrivate::activateAction(QAction *, QAction::ActionEvent, bool) 0x1003ad6c4
                      24 QWidget::event(QEvent *) 0x100271050
                      25 QMenu::event(QEvent *) 0x1003b53c2
                      26 QApplicationPrivate::notify_helper(QObject *, QEvent *) 0x100236d32
                      27 QApplication::notify(QObject *, QEvent *) 0x100239b8d
                      28 QCoreApplication::notifyInternal2(QObject *, QEvent *) 0x100eae85f
                      29 QApplicationPrivate::sendMouseEvent(QWidget *, QMouseEvent *, QWidget *, QWidget *, QWidget * *, QPointer<QWidget>&, bool) 0x100237660
                      30 QWidgetWindow::handleMouseEvent(QMouseEvent *) 0x1002913a1
                      31 QWidgetWindow::event(QEvent *) 0x10028fe60
                      32 QApplicationPrivate::notify_helper(QObject *, QEvent *) 0x100236d32
                      33 QApplication::notify(QObject *, QEvent *) 0x10023810d
                      34 QCoreApplication::notifyInternal2(QObject *, QEvent *) 0x100eae85f
                      35 QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent *) 0x1007ec094
                      36 QWindowSystemInterface::sendWindowSystemEvents(QFlagsQEventLoop::ProcessEventsFlag) 0x1007d3d4b
                      37 QCocoaEventDispatcherPrivate::postedEventsSourceCallback(void *) 0x105a0faf1
                      38 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION 0x7fff3be90155
                      39 __CFRunLoopDoSource0 0x7fff3be900fb
                      40 __CFRunLoopDoSources0 0x7fff3be73b95
                      41 __CFRunLoopRun 0x7fff3be7313e
                      42 CFRunLoopRunSpecific 0x7fff3be72a28
                      43 RunCurrentEventLoopInMode 0x7fff3b10bb35
                      44 ReceiveNextEventCommon 0x7fff3b10b774
                      45 _BlockUntilNextEventMatchingListInModeWithFilter 0x7fff3b10b5e8
                      46 _DPSNextEvent 0x7fff393c7eb7
                      47 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] 0x7fff393c6c56
                      48 -[NSApplication run] 0x7fff393c0cb9
                      49 QCocoaEventDispatcher::processEvents(QFlagsQEventLoop::ProcessEventsFlag) 0x105a0e8ed
                      50 QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) 0x100eaa3b2
                      51 QCoreApplication::exec() 0x100eaef72
                      52 main main.cpp 11 0x100003b54
                      53 start 0x7fff6905508d

                      J Offline
                      J Offline
                      JonB
                      wrote on 8 Nov 2018, 20:32 last edited by JonB 11 Aug 2018, 20:38
                      #26

                      @TheCipo76

                      2 inserisciarticolo::on_comboBox_Cliente_currentTextChanged(QString const&) inserisciarticolo.cpp 497 0x10003ce05

                      While executing your comboBox->additem(), you have a slot on_comboBox_Cliente_currentTextChanged, which does a setText(), which you haven't told us about? What is your code for that function...? Because I think you're going to find the crash is there :)

                      P.S.
                      This is why learning to use a debugger will be about the most productive time investment you can make!

                      T 1 Reply Last reply 9 Nov 2018, 07:32
                      3
                      • J JonB
                        8 Nov 2018, 20:32

                        @TheCipo76

                        2 inserisciarticolo::on_comboBox_Cliente_currentTextChanged(QString const&) inserisciarticolo.cpp 497 0x10003ce05

                        While executing your comboBox->additem(), you have a slot on_comboBox_Cliente_currentTextChanged, which does a setText(), which you haven't told us about? What is your code for that function...? Because I think you're going to find the crash is there :)

                        P.S.
                        This is why learning to use a debugger will be about the most productive time investment you can make!

                        T Offline
                        T Offline
                        TheCipo76
                        wrote on 9 Nov 2018, 07:32 last edited by
                        #27

                        @JonB because i think the problem is not there.. arg1 was not used..
                        it's a blanking form slot..

                        void inserisciarticolo::on_comboBox_Cliente_currentTextChanged(const QString &arg1)
                        {
                            if (AzzeraI == true) {
                                for (int i=0;i<10;i++) {
                                    array_Codice[i]->setText("");
                                    array_Descrizione[i]->setText("");
                                    array_Qta[i]->setValue(0);
                                    array_Origine[i]->setCurrentText("");
                                    array_Fornitore[i]->setCurrentText("");
                                }
                            }
                        }
                        

                        You're right!! The problem was "AzzeraI" var..
                        i set it to false on dialog loading and all works!

                        Thanks to all

                        1 Reply Last reply
                        0

                        26/27

                        8 Nov 2018, 20:32

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