python
bpo-32862: Make os.dup2(fd, fd) a no-op for valid fd
os.dup2(fd, fd, inheritable=True) never changed fd inheritability, but with inheritable=False the function might fail or change it in an inconsistent manner depending on the platform.
https://bugs.python.org/issue32862
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This PR is stale because it has been open for 30 days with no activity.
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Last time this PR was modified five years ago and still has unresolved reviews. If it stays abandoned, it will be closed.
I'm going to rebase this PR and address the review within a week, please don't close.
After revisiting this issue I've come to think that the approach taken in this PR may be not the best. I've created an alternative PR #102148.
I intend to keep this PR open until the discussion in issue #77043 comes to a conclusion.