If you setulimit -n unlimited on Solaris and its derivatives (where/dev/poll is available) and importselectors, Python crashes with aMemoryError:

> ulimit -n unlimited> python3.11 -c"import selectors"Traceback (most recentcall last):  File"<string>", line 1, in<module>  File"/usr/lib/python3.11/selectors.py", line 613, in<module>    elif _can_use('devpoll'):^^^^^^^^^^^^^^^^^^^  File"/usr/lib/python3.11/selectors.py", line 594, in _can_use    selector_obj = selector()^^^^^^^^^^MemoryError

The issue is that Python usesRLIMIT_NOFILE to allocatedthat manystruct pollfds, and there is no upper limit. Infinity is represented by something close to INT_MAX, and the allocation thus fails.

Your environment

I tested this on Oracle Solaris with 3.11, 3.9 and 3.7 (where you need a slightly different way to crash it:python3.7 -c "import select; select.devpoll()").

I verified that on SmartOS, it behaves the same way (on SmartOS, you can actually set hugeulimit -n values that break it as well).

Linked PRs

• gh-102494: fix MemoryError when using selectors on Solaris #102495