Two issues with overring functions in the global namespace

[pylint-bot]

Originally reported by: Antony Lee (BitBucket: anntzer, GitHub: @anntzer?)

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#!python
func1 = None
def func2(): pass

def override_func():
    global func1, func2
    def func1(): pass
    func2 = None

Pylint gives various spurious warnings here in override_func: it does not realize that def func1():... assigns a new value at the global level too, and thinks that there is no previous binding for func2 before overriding it.

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• Bitbucket: https://bitbucket.org/logilab/pylint/issue/330