no compile error, error on run

[sincnarf]

I can compile my project with no error, but a windows error (send report, end task) suddenly appears when the program executes this function.

By the way, I am trying to resize a loaded Image to the scene's size keeping the image's aspect ratio. any other suggestions would be nice.

void MainWindow::loadGraphicsViewParameter(QGraphicsView *graphicsView)
{
    QString fileName = QFileDialog::getOpenFileName(this,
                       tr("Open Image"), QDir::currentPath());
    if (!fileName.isEmpty())
    {
        QImage tempImage(fileName);
        if (tempImage.isNull())
        {
            QMessageBox::information(this, tr("Load Warning"),
                                     tr("Cannot load %1.").arg(fileName));
            return;
        }
        QImage image = tempImage.convertToFormat(QImage::Format_ARGB32);
        QGraphicsScene *scene = new QGraphicsScene;
        QGraphicsScene* viewScene = graphicsView->scene();
        QPixmap pixmap = QPixmap::fromImage(image);
 
        scene->addPixmap(pixmap.scaled(QSize((int)viewScene->width(), (int)viewScene->height()), Qt::KeepAspectRatio, Qt::SmoothTransformation));
 
		qDebug() << "Width = " << viewScene->width();
		qDebug() << "Height = " << viewScene->height();
 
        graphicsView->setScene(scene);
        graphicsView->show();
    }
}

void MainWindow::loadGraphicsViewParameter(QGraphicsView *graphicsView)
{
    QString fileName = QFileDialog::getOpenFileName(this,
                       tr("Open Image"), QDir::currentPath());
    if (!fileName.isEmpty())
    {
        QImage tempImage(fileName);
        if (tempImage.isNull())
        {
            QMessageBox::information(this, tr("Load Warning"),
                                     tr("Cannot load %1.").arg(fileName));
            return;
        }
        QImage image = tempImage.convertToFormat(QImage::Format_ARGB32);
        QGraphicsScene *scene = new QGraphicsScene;
        QGraphicsScene* viewScene = graphicsView->scene();
        QPixmap pixmap = QPixmap::fromImage(image);

        scene->addPixmap(pixmap.scaled(QSize((int)viewScene->width(), (int)viewScene->height()), Qt::KeepAspectRatio, Qt::SmoothTransformation));

		qDebug() << "Width = " << viewScene->width();
		qDebug() << "Height = " << viewScene->height();
	
        graphicsView->setScene(scene);
        graphicsView->show();
    }
}

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