QComboBox crashes my application

[powlee]

Hi,

I have a little bit of trouble with my application crashing while filling a combo box.

gameLabel = new QLabel(tr("Spielname:"));
    gameCombo = new QComboBox();
 
    connect(gameCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(loadGameInfo(int)));
 
    QSqlTableModel *games = new QSqlTableModel();
 
    games->setTable("games");
    games->setSort(1, Qt::AscendingOrder);
    games->select();
 
   qDebug() << "LoadGameDialog: Row Count";
   qDebug() << games->rowCount();
 
    for (int i = 0; i < games->rowCount(); ++i) {
 
        QSqlRecord r = games->record(i);
 
        qDebug() << "LoadGameDialog: name ";
        qDebug() << r.value("name").toString();
        qDebug() << "LoadGameDialog: id_games";
        qDebug() << r.value("id_games");
 
        gameCombo->addItem(r.value("name").toString(), r.value("id_games"));
 
        qDebug() << "Item added to combo box";
 
    }

gameLabel = new QLabel(tr("Spielname:"));
    gameCombo = new QComboBox();

    connect(gameCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(loadGameInfo(int)));

    QSqlTableModel *games = new QSqlTableModel();

    games->setTable("games");
    games->setSort(1, Qt::AscendingOrder);
    games->select();

   qDebug() << "LoadGameDialog: Row Count";
   qDebug() << games->rowCount();

    for (int i = 0; i < games->rowCount(); ++i) {

        QSqlRecord r = games->record(i);

        qDebug() << "LoadGameDialog: name ";
        qDebug() << r.value("name").toString();
        qDebug() << "LoadGameDialog: id_games";
        qDebug() << r.value("id_games");

        gameCombo->addItem(r.value("name").toString(), r.value("id_games"));

        qDebug() << "Item added to combo box";

    }

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I'm not even sure if the addItem() function is the problem since it worked fine till now. But the commandline output lead me to the conclusion that the crash is caused by the addItem() function.

Here is the Console

Starte E:\Workspace\MASA\trunk\MASA-build-desktop\debug\MASA.exe...
[Main] Cannot load translation file
[DbConnection] DB Connection "qt_sql_default_connection" established 
Enter MainWindow::loadGame 
before new dialog 
LoadGameDialog: Row Count 
72 
LoadGameDialog: name  
"20120207-TestKameraeinstellungUSZ" 
LoadGameDialog: id_games 
QVariant(int, 73) 
E:\Workspace\MASA\trunk\MASA-build-desktop\debug\MASA.exe beendet, Rückgabewert -1073741819

Starte E:\Workspace\MASA\trunk\MASA-build-desktop\debug\MASA.exe...
[Main] Cannot load translation file
[DbConnection] DB Connection "qt_sql_default_connection" established 
Enter MainWindow::loadGame 
before new dialog 
LoadGameDialog: Row Count 
72 
LoadGameDialog: name  
"20120207-TestKameraeinstellungUSZ" 
LoadGameDialog: id_games 
QVariant(int, 73) 
E:\Workspace\MASA\trunk\MASA-build-desktop\debug\MASA.exe beendet, Rückgabewert -1073741819

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[Lykurg]

That is not how you normally debug. See the backtrace to identify what really crashes the application. I bet it is not the addItem! What is it: You have a connect statement before you fill the box, thus the connection is established after you add a item, so loadGameInfo() is called. Look there for the crash!

[powlee]

Thx for the info, it seemed really wired to me that this function would crash. Unfortunatly my debugger is not working atm, I have some issues with other librarys not beeing built with the same compiler. Hope to fix that soon. Anyways thx for the hint.