QDeclarativeImageProvider::requestTexture leak textures

Textures returned from QDeclarativeImageProvider::requestTexture are not deleted. Easy to re-produce with ListView together with an Image delegate using a custom image provider.

The first hint is given by qmlscene's default output at exit. In my particular case:
"Number of leaked textures: 17"

And if I "qDebug() << m_cache.size()" in QDeclarativePixmapStore's destructor, I get exactly the same number. Not sure if it is related though.

The destructor of the texture returned from ::requestTexture is never called, so something is obviously broken.