https://buildbot.python.org/all/#/builders/224/builds/5

0:46:02 load avg: 1.53 [259/423/1] test__xxsubinterpreters failed -- running: test_httplib (1 min 6 sec), test_mmap (16 min 42 sec)
beginning 6 repetitions
123456
..Exception in thread Thread-28:
Traceback (most recent call last):
  File "D:\buildarea\3.8.ware-win81-release.refleak\build\lib\threading.py", line 923, in _bootstrap_inner
    self.run()
  File "D:\buildarea\3.8.ware-win81-release.refleak\build\lib\threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "D:\buildarea\3.8.ware-win81-release.refleak\build\lib\test\test__xxsubinterpreters.py", line 51, in run
    interpreters.run_string(interp, dedent(f"""
RuntimeError: unrecognized interpreter ID 182
test test__xxsubinterpreters failed -- Traceback (most recent call last):
  File "D:\buildarea\3.8.ware-win81-release.refleak\build\lib\test\test__xxsubinterpreters.py", line 492, in test_subinterpreter
    self.assertTrue(interpreters.is_running(interp))
AssertionError: False is not true

(...)

FAIL: test_still_running (test.test__xxsubinterpreters.DestroyTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\buildarea\3.8.ware-win81-release.refleak\build\lib\test\test__xxsubinterpreters.py", line 765, in test_still_running
    interpreters.destroy(interp)
AssertionError: RuntimeError not raised