Failure during the print of select.select output with unblocking sys.stdin

Bug report

Bug description:

This code terminates with error messages after several loop iterations:

import sys
import os
import select

os.set_blocking(sys.stdin.fileno(), False)

while True:
    print('>')
    ready = select.select([sys.stdin, ], [], [], 0.0)[0]
    print(f'< ready={ready}')

$ python3.11 stdin-nonblocking-bug-report.py
<... skip many iterations ...>
< ready=[]
>
< ready=[]
>
< ready=[]
Traceback (most recent call last):
Exception ignored in: <_io.TextIOWrapper name='<stdout>' mode='w' encoding='utf-8'>
Exception ignored in sys.unraisablehook: <built-in function unraisablehook>

$ echo $?
120

The failure occurs in print(f'< ready={ready}').

Python-3.11
FreeBSD 14.1

CPython versions tested on:

3.11

Operating systems tested on:

Other

从提供的 reproducer 开始，该 reproducer 将 sys.stdin 设置为 nonblocking，并在打印前反复调用 select.select。在 Python 3.11 和 FreeBSD 14.1 上复现该故障，然后跟踪 stdout 打印和 shutdown 路径以确定原因。在所述条件下循环不再产生报告的 unraisable I/O error，即表示完成。