Sure. Still, I think interpreter diagnostics should be pointing to the exact place of trouble. At least, __getattribute__ must appear somewhere in the traceback to give a hint where from __repr__ was attempted to be called.
When you write a faulty __getattribute__ that returns None instead of raising AttributeError, it's not realistic to expect __getattribute__ to be in the stack trace.
--Guido van Rossum (home page: http://www.python.org/%7Eguido/)