Intermittent iOS buildbot failure in test_sock_client_racing

Bug report

Bug description:

This is failing on about 10% of attempts. Usually it passes on a rerun:

• https://buildbot.python.org/#/builders/1380/builds/6364
• https://buildbot.python.org/#/builders/1380/builds/6374

But sometimes it fails on the rerun:

• https://buildbot.python.org/#/builders/1380/builds/6331
• https://buildbot.python.org/#/builders/1380/builds/6403

 ERROR: test_sock_client_racing (test.test_asyncio.test_sock_lowlevel.KqueueEventLoopTests.test_sock_client_racing)
 ----------------------------------------------------------------------
 Traceback (most recent call last):
   File "/Users/buildbot/Library/Developer/CoreSimulator/Devices/4F9AFDE7-A49A-46AD-B161-FCA22E48EA55/data/Containers/Bundle/Application/3DAA3568-C09B-454E-9E2B-4749EEB89567/iOSTestbed.app/python/lib/python3.15/test/test_asyncio/test_sock_lowlevel.py", line 273, in test_sock_client_racing
     self.loop.run_until_complete(asyncio.wait_for(
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
         self._basetest_sock_send_racing(listener, sock), 10))
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/Users/buildbot/Library/Developer/CoreSimulator/Devices/4F9AFDE7-A49A-46AD-B161-FCA22E48EA55/data/Containers/Bundle/Application/3DAA3568-C09B-454E-9E2B-4749EEB89567/iOSTestbed.app/python/lib/python3.15/asyncio/base_events.py", line 724, in run_until_complete
     return future.result()
            ~~~~~~~~~~~~~^^
   File "/Users/buildbot/Library/Developer/CoreSimulator/Devices/4F9AFDE7-A49A-46AD-B161-FCA22E48EA55/data/Containers/Bundle/Application/3DAA3568-C09B-454E-9E2B-4749EEB89567/iOSTestbed.app/python/lib/python3.15/asyncio/tasks.py", line 488, in wait_for
     return await fut
            ^^^^^^^^^
   File "/Users/buildbot/Library/Developer/CoreSimulator/Devices/4F9AFDE7-A49A-46AD-B161-FCA22E48EA55/data/Containers/Bundle/Application/3DAA3568-C09B-454E-9E2B-4749EEB89567/iOSTestbed.app/python/lib/python3.15/test/test_asyncio/test_sock_lowlevel.py", line 196, in _basetest_sock_send_racing
     sock.send(b' ' * size)
     ~~~~~~~~~^^^^^^^^^^^^^
 ConnectionResetError: [Errno 54] Connection reset by peer

@freakboy3742: FYI

CPython versions tested on:

CPython main branch

Operating systems tested on:

Other

Bắt đầu với test/test_asyncio/test_sock_lowlevel.py, đặc biệt là KqueueEventLoopTests.test_sock_client_racing và _basetest_sock_send_racing, sau đó so sánh các lỗi và lần chạy lại được liên kết của iOS buildbot. Được xem là hoàn thành khi test không còn thỉnh thoảng thất bại trên iOS buildbot nhưng vẫn phát hiện được các lỗi socket thực sự.