As subtype_dealloc decref'ed the HeapType I thought the dealloc method was the most appropriate place to decrement the refcount of the type.
However you still agree that these types need to be recounted properly, don't you? In that case, where would you place the decref of the type?
I have talked with Martin v. Löwis about this issue, and I think he was quite comfortable with placing the decref inside the dealloc method.