Bug report

Bug description:

Summary

Multiple sites inModules/selectmodule.c checkif (errno < 0) after close/epoll_ctl calls. Sinceerrno is anint set to positive values (POSIX), this check is always false. Close errors are silently swallowed.

Fix

Changeif (errno < 0) toif (retval < 0) (check the return value, not errno directly).

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-146205: Check the errno with != 0 in close impls in select module #146206