Windows debug main test_os, test_venv failures

[terryjreedy]

python -m test -uall test_os

test test_os failed -- Traceback (most recent call last):
  File "f:\dev\3x\Lib\test\test_os.py", line 2229, in test_fdopen
    self.check_bool(os.fdopen, encoding="utf-8")
    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "f:\dev\3x\Lib\test\test_os.py", line 2224, in check_bool
    with self.assertRaises(RuntimeWarning):
        f(fd, *args, **kwargs)
AssertionError: RuntimeWarning not raised

python -m test.test_os crash box EDIT: this is with direct unittest run

minkernal\crts\ucrt\src\appcrt\lowio\isatty.cpp
Assertion failed (fh>=0 && (unsigned)fh < (unsigned)_nhandle

python -m test test_venv

Traceback (most recent call last):
  File "f:\dev\3x\Lib\multiprocessing\process.py", line 314, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "f:\dev\3x\Lib\multiprocessing\process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "f:\dev\3x\Lib\test\_test_venv_multiprocessing.py", line 10, in drain_queue
    if code != queue.get():
               ~~~~~~~~~^^
  File "f:\dev\3x\Lib\multiprocessing\queues.py", line 102, in get
    with self._rlock:
        res = self._recv_bytes()
  File "f:\dev\3x\Lib\multiprocessing\synchronize.py", line 98, in __exit__
    return self._semlock.__exit__(*args)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
OSError: [WinError 6] The handle is invalid

test test_venv failed -- Traceback (most recent call last):
  File "f:\dev\3x\Lib\test\test_venv.py", line 277, in test_prefixes
    self.assertEqual(out.strip(), expected.encode(), prefix)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: b'f:\\dev\\3x' != b'f:\\dev\\3x\\' : base_prefix

python -m test -uall -v test_venv hangs with test_with_pip (test.test_venv.EnsurePipTest.test_with_pip)

python -m test.test_venv -vv shows traceback and then hangs

Linked PRs

• gh-116925
• gh-117065
• gh-117076
• gh-117116