[issue4315] On some Python builds, exec in a function can't create shadows of variables if these are declared "global" in another function of the same module

[Gabriel Genellina]

Changes by Gabriel Genellina <gagsl-py2 at yahoo.com.ar>:


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nosy: +gagenellina

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4315>
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