[issue3445] Ignore missing attributes in functools.update_wrapper

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

The patch should come with an unit test (in Lib/test/test_functools.py).

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3445>
_______________________________________