CRASH: QMacPixmapData does not check if memory allocation but copies data

    for(;;)
    {
        qDebug() << "allocating....";
        QPixmap* testPixmap = new QPixmap(10000,10000);
        QImage testImage2(10000,10000, QImage::Format_RGB32);
        testPixmap->convertFromImage( testImage2 );
    }

void QMacPixmapData::macCreatePixels()
{
    const int numBytes = bytesPerRow * h;
    quint32 *base_pixels;
    if (pixelsToFree && pixelsToFree != pixels) {
        // Reuse unused block of memory lying around from a previous callback.
        base_pixels = pixelsToFree;                                         // Does this really have the right size????
        pixelsToFree = 0;
    } else {
        // We need a block of memory to do stuff with.
        base_pixels = static_cast<quint32 *>(malloc(numBytes));             // allocatio, no check
    }

    if (pixels)
        memcpy(base_pixels, pixels, qMin(pixelsSize, (uint) numBytes));     // just copy them over, no check for target size
                                                                            // no check if memory was allocated at all
    pixels = base_pixels;
    pixelsSize = numBytes;
}