Changing the image on a QLabel crashes

I am using QLabel::setPixmap() to set a pixmap to a QLabel and calling it a second time to change the image. The application crashes on the first paintEvent() call after I call the setPixmap to replace the pixmap. I have tracked the crash down to the OpenVG engines code. I can see that the crash occurs somewhere onside the rpEndPolygon() call on vg_image_handler.c

This is tested on Symbian emulator only. Also attached is the images and the small example code to demonstrate the problem.