gh-130932: cwd cannot be removed on Solaris/Illumos

[kulikjak]

Recently introduced test_script_shadowing_stdlib_cwd_failure (#130934) fails on Solaris/Illumos, because, similarly to Windows, cwd cannot be removed. Instead, it fails with OSError: [Errno 22] Invalid argument.

======================================================================
FAIL: test_script_shadowing_stdlib_cwd_failure (test.test_import.ImportTests.test_script_shadowing_stdlib_cwd_failure)
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Traceback (most recent call last):
  File "/builds/jkulik/permanent/buildbot-worker/worker/python-main.ulx-0-oracle-solaris-trunk-amd64/build/components/python/pythonmain/cpython-main/Lib/test/test_import/__init__.py", line 1208, in test_script_shadowing_stdlib_cwd_failure
    self.assertRegex(stdout, expected_error)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: Regex didn't match: b"AttributeError: module 'os' has no attribute 'does_not_exist'" not found in b'Traceback (most recent call last):\n  File "<string>", line 1, in <module>\n    import main\n  File "/tmp/test_python_2l_0nt7c/tmp_zo8bxtz/subtmp/main.py", line 7, in <module>\n  File "/builds/jkulik/permanent/buildbot-worker/worker/python-main.ulx-0-oracle-solaris-trunk-amd64/build/components/python/pythonmain/cpython-main/Lib/shutil.py", line 845, in rmtree\n    _rmtree_impl(path, dir_fd, onexc)\n    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^\n  File "/builds/jkulik/permanent/buildbot-worker/worker/python-main.ulx-0-oracle-solaris-trunk-amd64/build/components/python/pythonmain/cpython-main/Lib/shutil.py", line 714, in _rmtree_safe_fd\n    _rmtree_safe_fd_step(stack, onexc)\n    ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^\n  File "/builds/jkulik/permanent/buildbot-worker/worker/python-main.ulx-0-oracle-solaris-trunk-amd64/build/components/python/pythonmain/cpython-main/Lib/shutil.py", line 795, in _rmtree_safe_fd_step\n    onexc(func, path, err)\n    ~~~~~^^^^^^^^^^^^^^^^^\n  File "/builds/jkulik/permanent/buildbot-worker/worker/python-main.ulx-0-oracle-solaris-trunk-amd64/build/components/python/pythonmain/cpython-main/Lib/shutil.py", line 746, in _rmtree_safe_fd_step\n    os.rmdir(name, dir_fd=dirfd)\n    ~~~~~~~~^^^^^^^^^^^^^^^^^^^^\nOSError: [Errno 22] Invalid argument: \'/tmp/test_python_2l_0nt7c/tmp_zo8bxtz/subtmp\'\n'

• Issue: _PyModule_IsPossiblyShadowing can return -1 without an exception set #130932

[miss-islington-app]

Thanks @kulikjak for the PR, and @vstinner for merging it 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖

[bedevere-app]

GH-131073 is a backport of this pull request to the 3.13 branch.