QQuickTextureFactory's, when will them be freed

[Virgo]

I was messing with the async image provider example, and found this perhaps interesting bit: QQuickTextureFactorys created in QQuickImageResponse::textureFactory() are never(?) freed. Not even after the Images are destroyed.
Is this intended?

off topic: there is a type in qfont.cpp, "indiviaul" should have been "individual".