[Qgis-developer] What's the difference between provider.geometryType() and layer.geometryType()

[Anita Graser]

Hi Victor,

I've been porting one of my scripts to the new Processing. Everything  
seems fine but I'm confused about one issue:
It seems like almost everything can be accessed via the layer now, e.g.  
crs(), pendingFields(), etc. However, if I try to use layer.geometryType()  
in the VectorWriter constructor, I get an error. It only works if I do:

writer = VectorWriter(output, None, fields, provider.geometryType(),  
layer.crs() )

What's the reason for this unintuitive behavior?

Thanks and best wishes,
Anita