test_socket: NetworkConnectionAttributesTest.clientTearDown() raised AttributeError on AMD64 RHEL7 Refleaks 3.x

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NetworkConnectionAttributesTest.clientTearDown() raised AttributeError: 'NetworkConnectionAttributesTest' object has no attribute 'cli'.

AMD64 RHEL7 Refleaks 3.x:

(...)
3:19:42 load avg: 0.00 running (1): test_socket (3 hour 17 min)
3:20:12 load avg: 0.00 running (1): test_socket (3 hour 18 min)
3:20:42 load avg: 0.00 running (1): test_socket (3 hour 18 min)
3:21:12 load avg: 0.00 running (1): test_socket (3 hour 19 min)
3:21:42 load avg: 0.00 running (1): test_socket (3 hour 19 min)
3:22:12 load avg: 0.00 [467/467/2] test_socket worker non-zero exit code (Exit code 1)
beginning 6 repetitions
123456
..Warning -- Unraisable exception
Exception ignored in thread started by: <bound method ThreadableTest.clientRun of <test.test_socket.NetworkConnectionAttributesTest testMethod=testSourceAddress>>
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/test/test_socket.py", line 406, in clientRun
    self.clientTearDown()
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/test/test_socket.py", line 5368, in clientTearDown
    self.cli.close()
    ^^^^^^^^
AttributeError: 'NetworkConnectionAttributesTest' object has no attribute 'cli'
Timeout (3:20:00)!
Thread 0x00007f268deaf740 (most recent call first):
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/socket.py", line 295 in accept
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/test/test_socket.py", line 5373 in _justAccept
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/unittest/case.py", line 589 in _callTestMethod
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/unittest/case.py", line 636 in run
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/unittest/case.py", line 692 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/unittest/suite.py", line 122 in run
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/unittest/suite.py", line 84 in __call__
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/test/support/testresult.py", line 146 in run
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/test/support/__init__.py", line 1155 in _run_suite
  File "/home/buildbot/buildarea/3.x.cstratak-RHEL7-x86_64.refleak/build/Lib/test/support/__init__.py", line 1282 in run_unittest

build: https://buildbot.python.org/all/#/builders/562/builds/902

Linked PRs

• gh-110391: socket NetworkConnectionAttributesTest always declare cli #110401
• [3.12] gh-110391: socket NetworkConnectionAttributesTest always declare cli (GH-110401) #110405
• [3.11] gh-110391: socket NetworkConnectionAttributesTest always declare cli (GH-110401) #110406

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I don't know the root cause of this issue, but the merged change e37d455 should unblock test_socket which may provide more information if the test fails again.