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

[Josh Rosenberg]

Josh Rosenberg <shadowranger+python at gmail.com> added the comment:

This seems likely to have been caused by the fixes for #37267, which fixes an issue with os.dup leaving character streams inheritable (when the documentation specifies that the result must be non-inheritable).

The code originally didn't try to make the descriptor non-inheritable because someone believed it wasn't allowed for character files, and the subsequent patch comments say "That was a mistake". Is it possible it wasn't allowed on Windows 7, and is allowed on Windows 10?

I'm nosying the folks from #37267 for input.

----------
nosy: +ZackerySpytz, josh.r, vstinner

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37549>
_______________________________________