[New-bugs-announce] [issue4322] function with modified __name__ uses original name when there's an arg error

[Erick Tryzelaar]

New submission from Erick Tryzelaar <idadesub at users.sourceforge.net>:

I ran into a case where I modified the __name__ attribute of a function 
and then didn't specify the right number of arguments, and I got a 
TypeError that used the original function name, as demonstrated here:

>>> def foo(): pass
... 
>>> foo.__name__ = 'bar'
>>> foo(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: foo() takes no arguments (1 given)

I would have expected it to say "TypeError: bar() ...". I'm guessing 
that the interpreter isn't using the __name__ attribute in this case.

----------
components: Library (Lib)
messages: 75853
nosy: erickt
severity: normal
status: open
title: function with modified __name__ uses original name when there's an arg error
type: behavior
versions: Python 3.0

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4322>
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