My app crashes when trying to quit

[superg]

Hi, my app used to close properly but a few days back it started to crash when trying to quit.
I can't find where's the mistake.
Everything is OK until I call qApp->quit() (It happens also with QApplication::quit() and exit(1)).
Here's what I see in my app Output:

2022-12-15 16:38:29.252285-0300 ProyectoPola[49557:596442] [qt.core.library] "/Users/santiagocarlos/Qt/6.4.1/macos/plugins/imageformats/libqgif.dylib" unloaded library (faked)
ProyectoPola(49557,0x100307dc0) malloc: *** error for object 0x101c07310: pointer being freed was not allocated
ProyectoPola(49557,0x100307dc0) malloc: *** set a breakpoint in malloc_error_break to debug
Detected Qt Version: 0x60401 (namespace='no namespace')
Found function QObject::property: 0x1012372e0
Found function QObject::customEvent: 0x10122f120

When the crash happens, this is the first function that I see in the debugger that has a problem. It's in the qarraydata.h file, in the following function:

static void deallocate(QArrayData *data) noexcept
    {
        static_assert(sizeof(QTypedArrayData) == sizeof(QArrayData));
        QArrayData::deallocate(data, sizeof(T), alignof(AlignmentDummy));
    }

All of this happens when I try to quit the app in my MainWindow. Here's the code for reference:

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // Carga de logos.
    QPixmap logoBio(":/images/Resources/logobiotandil.png");
    ui->logoBio->setPixmap(logoBio);
    QPixmap nombreBio(":/images/Resources/logobiotandil2.png");
    ui->nombreBio->setPixmap(nombreBio);
    QPixmap nombreRed(":/images/Resources/redimecfondo.png");
    ui->redimec->setPixmap(nombreRed);

    // Cargo pantallas



    // Set connection to database
    /*
    db = QSqlDatabase::addDatabase("QMARIADB");
    db.setHostName("200.41.196.243");
    db.setPort(3307);
    db.setDatabaseName("polarimetro");
    db.setUserName("polarimetrolbt");
    db.setPassword("polarimetrolbt");

    qDebug() << "db connection on menu: " << db.open();*/

}

void MainWindow::on_offButton_clicked() {
    qApp->quit();
}

void MainWindow::on_onButton_clicked() {
    Menu* menuEnsayos = new Menu(this);
    ui->stackedWidget->addWidget(menuEnsayos);
    ui->stackedWidget->setCurrentWidget(menuEnsayos);
}

MainWindow::~MainWindow()
{
    delete ui;
}

I run the app and immediately push the "off button". I do not press the "on button" at all.

Can anyone help me, please?
Thanks in advance.

[SGaist]

Right now, I don't. I remember having that kind of stuff happening from time to time on Windows. I would just nuked the build folder and start fresh.

[SGaist]

Hi,

Which version of macOS are you using ?
Which version of Xcode are you using ?
Does it also happen if you implement that in a default application ?

[superg]

@SGaist Hi! I'm using MacOS Catalina 10.15.7 and the command line tools version 12.0.

It's very weird, I just duplicated the project and run the app again, and works again. It might been a bug in the build folder, or something like that.

Do you know what could throw that kind of error?

[SGaist]

Right now, I don't. I remember having that kind of stuff happening from time to time on Windows. I would just nuked the build folder and start fresh.

[superg]

@SGaist That seems to be the solution, haha! Thanks.