Access violation reading when drawing QImage

#include <Qt>
#include <QImage>
#include <QPainter>
#include <QString>


const quint32 GUARD1 = 1;
const quint32 GUARD2 = 2;

const int IMG_WIDTH  = 4;
const int IMG_HEIGHT = 2;

const uint SRC_COLOR = 0xAAAAAAAA;
const uint DST_COLOR = 0;


int main( int /*agrc*/, char ** /*argv*/ )
{
    // The image format should be QImage::Format_ARGB32_Premultiplied, because
    // the issue is in src/gui/painting/qpaintengine_raster.cpp, method
    // void QRasterPaintEngine::drawImage(const QRectF &r,
    //                                    const QImage &img,
    //                                    const QRectF &sr,
    //                                    Qt::ImageConversionFlags),
    // line 2777
    QImage src( IMG_WIDTH, IMG_HEIGHT, QImage::Format_ARGB32_Premultiplied );
    src.fill( SRC_COLOR );

    QImage dst( IMG_WIDTH, IMG_HEIGHT, QImage::Format_ARGB32_Premultiplied );
    dst.fill( DST_COLOR );

    QPainter painter( &dst );
    // The issue is here!
    painter.drawImage( QPointF( 0, 0 ), src, QRectF( 0.0, 0.5, IMG_WIDTH, 1.5 ) );

    const uint * dstData = reinterpret_cast<const uint *>( dst.bits() );
    for ( int y = 0; y < IMG_HEIGHT; ++y )
    {
        for ( int x = 0; x < IMG_WIDTH; ++x )
        {
            uint pixel = *( dstData + y * IMG_WIDTH + x );
            Q_ASSERT_X(
                pixel == SRC_COLOR || pixel == DST_COLOR,
                "",
                QString( "x = %1, y = %2, pixel = 0x%3, expected 0x%4 or 0x%5" ).
                    arg( x ).arg( y ).arg( pixel, 0, 16 ).
                    arg( SRC_COLOR, 0, 16 ).arg( DST_COLOR, 0, 16 ).
                    toAscii()
            );
        }
    }

    return 0;
}