[3.14] gh-135906: Test more internal headers in test_cext/test_cppext

[vstinner]

• Issue: Use _PyObject_CAST in internal headers #135906

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @vstinner for commit b868f86 🤖

Results will be shown at:

https://buildbot.python.org/all/#/grid?branch=refs%2Fpull%2F144758%2Fmerge

If you want to schedule another build, you need to add the 🔨 test-with-buildbots label again.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Windows11 Refleaks 3.14 (tier-1) has failed when building commit c11e70a.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1682/builds/460) and take a look at the build logs.
4. Check if the failure is related to this commit (c11e70a) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1682/builds/460

Failed tests:

• test_httpservers

Failed subtests:

• test_large_content_length_truncated - test.test_httpservers.CGIHTTPServerTestCase.test_large_content_length_truncated

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File "b:\uildarea\3.14.ware-win11.refleak\build\Lib\test\test_httpservers.py", line 1139, in test_large_content_length_truncated
    res = self.request('/cgi-bin/file1.py', 'POST', b'x', headers)
  File "b:\uildarea\3.14.ware-win11.refleak\build\Lib\test\test_httpservers.py", line 131, in request
    self.connection.request(method, uri, body, headers)
    ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "b:\uildarea\3.14.ware-win11.refleak\build\Lib\http\client.py", line 1358, in request
    self._send_request(method, url, body, headers, encode_chunked)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "b:\uildarea\3.14.ware-win11.refleak\build\Lib\http\client.py", line 1404, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "b:\uildarea\3.14.ware-win11.refleak\build\Lib\http\client.py", line 1353, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "b:\uildarea\3.14.ware-win11.refleak\build\Lib\http\client.py", line 1152, in _send_output
    self.send(chunk)
    ~~~~~~~~~^^^^^^^
  File "b:\uildarea\3.14.ware-win11.refleak\build\Lib\http\client.py", line 1077, in send
    self.sock.sendall(data)
    ~~~~~~~~~~~~~~~~~^^^^^^
ConnectionAbortedError: [WinError 10053] An established connection was aborted by the software in your host machine


Traceback (most recent call last):
  File "b:\uildarea\3.14.ware-win11.refleak\build\Lib\test\libregrtest\single.py", line 236, in _runtest_env_changed_exc
    return
ResourceWarning: unclosed <socket.socket fd=428, family=2, type=1, proto=0, laddr=('127.0.0.1', 55669), raddr=('127.0.0.1', 55668)>


Traceback (most recent call last):
  File "b:\uildarea\3.14.ware-win11.refleak\build\Lib\test\libregrtest\single.py", line 236, in _runtest_env_changed_exc
    return
ResourceWarning: unclosed <socket.socket fd=700, family=2, type=1, proto=0, laddr=('127.0.0.1', 50248), raddr=('127.0.0.1', 50247)>