[issue18999] Robustness issues in multiprocessing.{get, set}_start_method

[Lars Buitinck]

Changes by Lars Buitinck <larsmans at gmail.com>:


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title: Allow multiple calls to multiprocessing.set_start_method -> Robustness issues in multiprocessing.{get,set}_start_method

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18999>
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