QPainter drawImage can cause crash

#include <QApplication>
#include <QtCore>
#include <QtGui>
#include <QPainter>

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);

	QImage brush(":/optimized.png");// cause crash
	//QImage brush(":/non-optimized.png"); //no crash
	QImage brush2(":/non-optimized.png");
	QImage *canvas = new QImage(300, 300, QImage::Format_ARGB32_Premultiplied);
	QPainter painter1(&brush);
	painter1.drawImage (brush.rect (),brush2);

	QPainter painter2(canvas);
	painter2.drawImage(QPoint(0,0),brush);// crash here

	return 0;
}