[issue2344] Using an iteration variable outside a list comprehension needs a Py3K warning

[Taek Joo Kim]

Taek Joo Kim <taicki at gmail.com> added the comment:

>>> i = 3
>>> [i for i in range(10)]
>>> i
9

In 2.6, the original value of a variable is changed by the list
comprehension. In 3.0, it is not. To fix this, we need many changes on AST.

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nosy: +taicki

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