[issue6477] Pickling of NoneType raises PicklingError

[Ezio Melotti]

Changes by Ezio Melotti <ezio.melotti at gmail.com>:


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keywords: +easy
stage:  -> needs patch
versions: +Python 3.3, Python 3.4 -Python 2.6, Python 3.0, Python 3.1

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<http://bugs.python.org/issue6477>
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