fail to find NameError in for loop expression_list

[pylint-bot]

Originally reported by: BitBucket: hacman, GitHub: @hacman?

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the following code is not caught by pylint. obviously, x will be a NameError at runtime.

for x in x:
pass

if the loop variable is different, then pylint properly catches a name error. e.g., the following is caught by pylint (undefined-variable as expected):

for i in L:
pass

I hope this report was helpful. Thanks for pylint! It makes my life so much easier.

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• Bitbucket: https://bitbucket.org/logilab/pylint/issue/498