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  1. 7th March 2012, 13:56 #1
    realJohnDoe
    realJohnDoe is offline Beginner
    Join Date
    Feb 2012
    Posts
    4
    Qt products
    Qt4
    Platforms
    Windows

    Default Program runs fine in Debug mode, but produces segmentation fault in Release Mode

    Hi Guys,

    Im quite new to Qt and have a problem, which i cant figure out how to solve:

    My program runs fine in Debug mode (using MingW compiler and Windows 7), but when i try to run it in Release mode, it produces "segmentation fault" errors when i close it or when i try to emit a signal in "NewGameWindow:n_pushButton_clicked()". I already searched on the internet and figured out, it probably has to be a wrong pointer, but i do not really know, what to look for in my code. If i show the stack in Debugging mode, it just shows "??" on every level.

    heres my source code:

    Go.pro:
    Qt Code: 
    1. #-------------------------------------------------
    2. #
    3. # Project created by QtCreator 2012-02-29T14:20:46
    4. #
    5. #-------------------------------------------------
    6.  
    7. QT       += core gui
    8.  
    9. TARGET = Go
    10. TEMPLATE = app
    11.  
    12.  
    13. SOURCES += main.cpp\
    14.         Interface/mainwindow.cpp \
    15.     Interface/newgamewindow.cpp \
    16.     Model/TwoDGrid.cpp \
    17.     Model/TwoDCoord.cpp \
    18.     Model/GameLogic.cpp \
    19.     Interface/GraphicsView/mouseovercircle.cpp
    20.  
    21. HEADERS  += Interface/mainwindow.h \
    22.     Interface/newgamewindow.h \
    23.     Model/TwoDGrid.h \
    24.     Model/TwoDCoord.h \
    25.     Model/GameLogic.h \
    26.     Interface/GraphicsView/mouseovercircle.h
    27.  
    28. FORMS    += mainwindow.ui \
    29.     newgamewindow.ui
    30.  
    31. OTHER_FILES += \
    32.     Interface/White Stone60.bmp \
    33.     Interface/White Circle30.bmp \
    34.     Interface/Black Stone60.bmp \
    35.     Interface/Black Circle30.bmp
    36.  
    37. RESOURCES += \
    38.     GameImages.qrc
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    main.cpp:
    Qt Code: 
    1. #include <QtGui/QApplication>
    2. #include "Interface/mainwindow.h"
    3.  
    4. int main(int argc, char *argv[])
    5. {
    6.     QApplication a(argc, argv);
    7.  
    8.     MainWindow MainWdw;
    9.     MainWdw.resize(700, 700);
    10.     MainWdw.show();
    11.  
    12.     return a.exec();
    13. }
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    mainwindow.cpp:
    Qt Code: 
    1. #include "Interface/mainwindow.h"
    2. #include "ui_mainwindow.h"
    3. #include "Interface/newgamewindow.h"
    4. #include "Model/GameLogic.h"
    5.  
    6. #include <QtGui>
    7. #include <QLabel>
    8.  
    9. MainWindow::MainWindow(QWidget *parent) :
    10.     QMainWindow(parent),
    11.     ui(new Ui::MainWindow)
    12. {
    13.     ui->setupUi(this);
    14.  
    15.     scene = new QGraphicsScene(this);
    16.     ui->graphicsView->setScene(scene);
    17.     ui->graphicsView->setSceneRect(-300, -300, 600, 600);
    18.     ui->graphicsView->setRenderHint(QPainter::Antialiasing);
    19.     ui->graphicsView->setBackgroundBrush(QPixmap(":/Background600pattern.jpg"));
    20.  
    21.     connect(&theGameLogic, SIGNAL(FieldChangedOut(int,int,int)), this, SLOT(FieldChanged(int,int,int)));
    22. }
    23.  
    24. MainWindow::~MainWindow()
    25. {
    26.     delete ui;
    27. }
    28.  
    29. void MainWindow::on_actionNew_Game_triggered()
    30. {
    31.     NewGameWindow NewGameWdw(this);
    32.     connect(&NewGameWdw, SIGNAL(BoardSizeSet(int)), this, SLOT(BoardSizeSet(int)));
    33.     connect(&NewGameWdw, SIGNAL(GameStarted()), this, SLOT(GameStarted()));
    34.  
    35.     NewGameWdw.exec();
    36. }
    37. void MainWindow::on_actionExit_triggered()
    38. {
    39.     this->close();
    40. }
    41.  
    42. void MainWindow::BoardSizeSet(int Size)
    43. {    
    44.     if(!theGameLogic.SetSize(Size))
    45.         QMessageBox::warning(this, "Error", "Cannot set size. Game already started!");
    46.     else
    47.     {
    48.         BoardSize = Size;
    49.  
    50.         int LineWidth   = 4;
    51.         BorderWidth = 30;
    52.         GridWidth = (float)(600 - 2 * BorderWidth) / (BoardSize - 1);
    53.  
    54.         QPen LinePen(Qt::black);
    55.         LinePen.setWidth(LineWidth);
    56.         LinePen.setCapStyle(Qt::SquareCap);
    57.  
    58.         for(int i = 0; i < BoardSize; i++)
    59.         {
    60.             scene->addLine(BorderWidth - 300 + (i * GridWidth), BorderWidth - 300, BorderWidth - 300 + (i * GridWidth), 300 - BorderWidth, LinePen);  //paint vertical lines
    61.             scene->addLine(BorderWidth - 300, BorderWidth - 300 + (i * GridWidth), 300 - BorderWidth, BorderWidth - 300 + (i * GridWidth), LinePen);  //paint horizontal lines
    62.         }
    63.     }
    64. }
    65.  
    66. void MainWindow::GameStarted()
    67. {
    68.     if(!theGameLogic.StartGame())
    69.         QMessageBox::warning(this, "Error", "Cannot start game. Game already started!");  
    70.  
    71.     else
    72.     {
    73.         // Allocation of Board //
    74.  
    75.         circle = new MouseoverCircle**[ BoardSize ];
    76.  
    77.         for( int Column = 0; Column < BoardSize; Column++ )
    78.         {
    79.             circle[ Column ] = new MouseoverCircle*[ BoardSize ];
    80.  
    81.             for( int Row = 0; Row < BoardSize; Row++ )
    82.             {
    83.                 circle[ Column ][ Row ] = new MouseoverCircle( Column, Row );
    84.                 scene->addItem(circle[ Column ][ Row ]);
    85.                 circle[ Column ][ Row ]->setPos(-300 + BorderWidth + GridWidth * Column, -300 + BorderWidth + GridWidth * Row);
    86.                 connect(circle[Column][Row], SIGNAL(Mouseover(int,int)), this, SLOT(Mouseover(int,int)));
    87.                 connect(circle[Column][Row], SIGNAL(Clicked(int,int)), this, SLOT(Clicked(int,int)));
    88.             }
    89.         }
    90.     }
    91. }
    92.  
    93. void MainWindow::Mouseover(int Column, int Row)
    94. {
    95.     switch (theGameLogic.LegalTurn(Column, Row))
    96.     {
    97.         case 0:
    98.         {
    99.             circle[Column][Row]->Color = QColor(0, 0, 0, 0);
    100.         }
    101.         case 1:
    102.         {
    103.             circle[Column][Row]->Color = QColor(0, 0, 0, 127);
    104.             break;
    105.         }
    106.         case 2:
    107.         {
    108.             circle[Column][Row]->Color = QColor(255, 255, 255, 127);
    109.             break;
    110.         }
    111.     }
    112. }
    113.  
    114. void MainWindow::Clicked(int Column, int Row)
    115. {
    116.     theGameLogic.ExecuteTurn(Column, Row);
    117. }
    118.  
    119. void MainWindow::FieldChanged(int Column, int Row, int NewValue)
    120. {
    121.     QPen *RPen;
    122.     QBrush *RBrush;
    123.     switch(NewValue)
    124.     {
    125.         case 0:
    126.         {
    127.             RPen = new QPen(QColor(127, 127, 127));
    128.             RBrush = new QBrush(QColor(127, 127, 127));
    129.             break;
    130.         }
    131.         case 1:
    132.         {
    133.             RPen = new QPen(QColor(0, 0, 0));
    134.             RBrush = new QBrush(QColor(0, 0, 0));
    135.             break;
    136.         }
    137.         case 2:
    138.         {
    139.             RPen = new QPen(QColor(255, 255, 255));
    140.             RBrush = new QBrush(QColor(255, 255, 255));
    141.             break;
    142.         }
    143.         default:
    144.         {
    145.             RPen = new QPen(QColor(255, 0, 0));
    146.             RBrush = new QBrush(QColor(255, 0, 0));
    147.             break;
    148.         }
    149.     }
    150.     scene->addEllipse(-325 + BorderWidth + GridWidth * Column, -325 + BorderWidth + GridWidth * Row, 50, 50, *RPen, *RBrush);
    151. }
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    newgamewindow.cpp:
    Qt Code: 
    1. #include "Interface/newgamewindow.h"
    2. #include "ui_newgamewindow.h"
    3.  
    4. #include <QtGui>
    5. #include <QDebug>
    6.  
    7. NewGameWindow::NewGameWindow(QWidget *parent) :
    8.     QDialog(parent),
    9.     ui(new Ui::NewGameWindow)
    10. {
    11.     ui->setupUi(this);
    12. }
    13.  
    14. NewGameWindow::~NewGameWindow()
    15. {
    16.     delete ui;
    17. }
    18.  
    19. void NewGameWindow::on_pushButton_clicked()
    20. {
    21.     if(ui->radioButton->isChecked())
    22.         //QMessageBox::information(this, "board size set", "board size set to 9x9");
    23.         emit BoardSizeSet(9);
    24.     if(ui->radioButton_2->isChecked())
    25.         //QMessageBox::information(this, "board size set", "board size set to 13x13");
    26.         emit BoardSizeSet(13);
    27.     if(ui->radioButton_3->isChecked())
    28.         //QMessageBox::information(this, "board size set", "board size set to 19x19");
    29.         emit BoardSizeSet(19);
    30.     emit GameStarted();
    31.     qDebug() << "test";
    32.     this->close();
    33. }
    To copy to clipboard, switch view to plain text mode 

    if you need further information, just ask. Thank you for your help!

    EDIT: I figured out, the segmentation faults were coming from delete-commands in my model. After i removed them from the code, I now get segmentation faults when a mouseover over a circle occurs.

    EDIT2: Okay, i removed one line to much, so one pointer was set wront. The problem is now solved.
    Last edited by realJohnDoe; 7th March 2012 at 15:16.
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