[issue4926] putenv() accepts names containing '=', return value of unsetenv() not checked

[eryksun]

eryksun added the comment:

AFAICT, on Windows using the posix_putenv_garbage dict is unnecessary. The Windows C runtime creates a private copy of the string, so there's no need to keep a reference. Moreover, since there's no unsetenv, deleting a variable is accomplished by calling putenv with an empty value, e.g. putenv('foo', ''). This leaks an item in posix_putenv_garbage, which is left set as ('foo', 'foo=').

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nosy: +eryksun
versions: +Python 3.4, Python 3.5, Python 3.6 -Python 3.1, Python 3.2

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<http://bugs.python.org/issue4926>
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