[issue32270] subprocess closes redirected fds even if they are in pass_fds

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

Thanks for the report and the investigation!

> 1. The fact that file descriptors specified for redirection are closed (even with close_fds=False) unless in range [0, 2] is not documented and not tested.

That sounds like a bug to me, so we should fix it if decently possible.

> 2. pass_fds interaction with (1) should be fixed and documented. We may either raise ValueError if pass_fds contains a redirected fd or don't close such a redirected fd.

Same here, it seems like a bug which deserves fixing.

Do you want to submit a PR for this?

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32270>
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