Since the descriptor is classified as a routine (inspect.isroutine() returns True because inspect.ismethoddescriptor() returns True), pydoc outputs it in the "Methods defined here" section and uses the docroutine(). But docroutine() requires the __name__ attribute for determining whether this is an original method or an alias. That descriptor doesn't have the __name__ attribute. Actually it is even not callable, so it is questionable whether it can be classified as a method.

I don't know on what level this should be fixed. docroutine()? classify_class_attrs()? isroutine()? ismethoddescriptor()?