[issue7839] Popen should raise ValueError if pass a string when shell=False or a list when shell=True

[Andrew Svetlov]

Andrew Svetlov <andrew.svetlov at gmail.com> added the comment:

I like Eric's proposition, e.g. raising error if  (list, shell=True) or (str, shell=False)

If nobody object I can try to make initial patch for that.

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<http://bugs.python.org/issue7839>
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