Attached patch passes the regrtest and makes test-functools.py raise an exception rather than crash.  The proposed change will make functions like partial.__setstate__ require tuple argument even though currently it would accept any container.  This is not an issue with __setstate__ because it should only be called with arguments produced by __reduce__ and in the case of partial, __reduce__ produces state as a tuple.  Other functions may need to be modified if they need to continue to accept arbitrary sequences.