[issue37549] os.dup() fails for standard streams on Windows 7

[DaveB]

DaveB <junkmail4dave at gmail.com> added the comment:

Results with Python 3.7.4 on Windows 7

>>> import os, msvcrt
>>> msvcrt.get_osfhandle(0)
15
>>> os.set_handle_inheritable(msvcrt.get_osfhandle(0), False)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
OSError: [WinError 87] The parameter is incorrect
>>>

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<https://bugs.python.org/issue37549>
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