Several Tests fail in `test_regrtest.py`

[littlebutt]

Bug report

Bug description:

When I ran .\PCbuild\amd64\python.exe -m test -v test_regrtest in Powershell on Windows 10, it showed that this test case failed with 8 failures. All cases were releted to the subprocess with the wrong encodings. Here is the output of the test case:

== CPython 3.13.0a0 (heads/main:e57ecf6bbc, Sep 17 2023, 15:01:40) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd: C:\Users\luoga\Desktop\cpython\build\test_python_worker_8364æ
== CPU count: 12
== encodings: locale=cp936, FS=utf-8
0:00:00 Run 1 test sequentially
0:00:00 [1/1] test_regrtest
test_cleanup (test.test_regrtest.ArgsTestCase.test_cleanup) ... ok
test_coverage (test.test_regrtest.ArgsTestCase.test_coverage) ... ok
test_crashed (test.test_regrtest.ArgsTestCase.test_crashed) ... ok
test_doctest (test.test_regrtest.ArgsTestCase.test_doctest) ... FAIL
(Successful tests skipped...)
test_ignorefile (test.test_regrtest.ArgsTestCase.test_ignorefile) ... FAIL
test_interrupted (test.test_regrtest.ArgsTestCase.test_interrupted) ... ok
test_leak_tmp_file (test.test_regrtest.ArgsTestCase.test_leak_tmp_file) ... FAIL
test_list_cases (test.test_regrtest.ArgsTestCase.test_list_cases) ... ok
test_list_tests (test.test_regrtest.ArgsTestCase.test_list_tests) ... ok
test_matchfile (test.test_regrtest.ArgsTestCase.test_matchfile) ... FAIL
(Successful tests skipped...)
test_print_warning (test.test_regrtest.ArgsTestCase.test_print_warning) (option='-v') ... FAIL
(Successful tests skipped...)
test_threading_excepthook (test.test_regrtest.ArgsTestCase.test_threading_excepthook) ... FAIL
test_uncollectable (test.test_regrtest.ArgsTestCase.test_uncollectable) ... ok
test_unicode_guard_env (test.test_regrtest.ArgsTestCase.test_unicode_guard_env) ... ok
test_unraisable_exc (test.test_regrtest.ArgsTestCase.test_unraisable_exc) ... FAIL
test_wait (test.test_regrtest.ArgsTestCase.test_wait) ... ok
test_worker_decode_error (test.test_regrtest.ArgsTestCase.test_worker_decode_error) ... FAIL
(Successful tests skipped...)
======================================================================
FAIL: test_doctest (test.test_regrtest.ArgsTestCase.test_doctest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 1839, in test_doctest
    output = self.run_tests("--fail-env-changed", "-v", "-j1", testname,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 786, in run_tests
    return self.run_python(cmdargs, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 636, in run_python
    proc = self.run_command(args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 627, in run_command
    self.fail(msg)
AssertionError: Command ['C:\\Users\\luoga\\Desktop\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-m', 'test', '--testdir=C:\\Users\\luoga\\AppData\\Local\\Temp\\tmppuliyejk', '--fail-env-changed', '-v', '-j1', 'test_regrtest_noop1'] failed with exit code 1, but exit code 2 expected!

stdout:
---
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\luoga\Desktop\cpython\Lib\test\__main__.py", line 2, in <module>
    main()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 511, in main
    Regrtest(ns).main(tests=tests)
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 503, in main
    exitcode = self.run_tests(selected, tests)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 474, in run_tests
    return self._run_tests(selected, tests)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 427, in _run_tests
    display_header()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\utils.py", line 564, in display_header
    print("== cwd:", os.getcwd())
UnicodeEncodeError: 'gbk' codec can't encode character '\xe6' in position 61: illegal multibyte sequence
== CPython 3.13.0a0 (heads/main:e57ecf6bbc, Sep 17 2023, 15:01:40) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd:
---


======================================================================
FAIL: test_ignorefile (test.test_regrtest.ArgsTestCase.test_ignorefile)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 1164, in test_ignorefile
    output = self.run_tests("-v", "--ignorefile", filename, testname)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 786, in run_tests
    return self.run_python(cmdargs, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 636, in run_python
    proc = self.run_command(args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 627, in run_command
    self.fail(msg)
AssertionError: Command ['C:\\Users\\luoga\\Desktop\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-m', 'test', '--testdir=C:\\Users\\luoga\\AppData\\Local\\Temp\\tmpmmu_70er', '-v', '--ignorefile', '@test_8364_tmpæ', 'test_regrtest_noop8'] failed with exit code 1, but exit code 0 expected!

stdout:
---
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\luoga\Desktop\cpython\Lib\test\__main__.py", line 2, in <module>
    main()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 511, in main
    Regrtest(ns).main(tests=tests)
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 503, in main
    exitcode = self.run_tests(selected, tests)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 474, in run_tests
    return self._run_tests(selected, tests)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 427, in _run_tests
    display_header()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\utils.py", line 564, in display_header
    print("== cwd:", os.getcwd())
UnicodeEncodeError: 'gbk' codec can't encode character '\xe6' in position 60: illegal multibyte sequence
== CPython 3.13.0a0 (heads/main:e57ecf6bbc, Sep 17 2023, 15:01:40) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd:
---


======================================================================
FAIL: test_leak_tmp_file (test.test_regrtest.ArgsTestCase.test_leak_tmp_file)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 1748, in test_leak_tmp_file
    output = self.run_tests("--fail-env-changed", "-v", "-j2", *testnames,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 786, in run_tests
    return self.run_python(cmdargs, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 636, in run_python
    proc = self.run_command(args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 627, in run_command
    self.fail(msg)
AssertionError: Command ['C:\\Users\\luoga\\Desktop\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-m', 'test', '--testdir=C:\\Users\\luoga\\AppData\\Local\\Temp\\tmpilk6czg9', '--fail-env-changed', '-v', '-j2', 'test_regrtest_noop9', 'test_regrtest_noop10', 'test_regrtest_noop11'] failed with exit code 1, but exit code 3 expected!

stdout:
---
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\luoga\Desktop\cpython\Lib\test\__main__.py", line 2, in <module>
    main()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 511, in main
    Regrtest(ns).main(tests=tests)
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 503, in main
    exitcode = self.run_tests(selected, tests)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 474, in run_tests
    return self._run_tests(selected, tests)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 427, in _run_tests
    display_header()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\utils.py", line 564, in display_header
    print("== cwd:", os.getcwd())
UnicodeEncodeError: 'gbk' codec can't encode character '\xe6' in position 60: illegal multibyte sequence
== CPython 3.13.0a0 (heads/main:e57ecf6bbc, Sep 17 2023, 15:01:40) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd:
---


======================================================================
FAIL: test_matchfile (test.test_regrtest.ArgsTestCase.test_matchfile)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 1188, in test_matchfile
    output = self.run_tests("-v", testname)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 786, in run_tests
    return self.run_python(cmdargs, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 636, in run_python
    proc = self.run_command(args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 627, in run_command
    self.fail(msg)
AssertionError: Command ['C:\\Users\\luoga\\Desktop\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-m', 'test', '--testdir=C:\\Users\\luoga\\AppData\\Local\\Temp\\tmpvwymz4h0', '-v', 'test_regrtest_noop18'] failed with exit code 1, but exit code 0 expected!

stdout:
---
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\luoga\Desktop\cpython\Lib\test\__main__.py", line 2, in <module>
    main()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 511, in main
    Regrtest(ns).main(tests=tests)
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 503, in main
    exitcode = self.run_tests(selected, tests)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 474, in run_tests
    return self._run_tests(selected, tests)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 427, in _run_tests
    display_header()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\utils.py", line 564, in display_header
    print("== cwd:", os.getcwd())
UnicodeEncodeError: 'gbk' codec can't encode character '\xe6' in position 60: illegal multibyte sequence
== CPython 3.13.0a0 (heads/main:e57ecf6bbc, Sep 17 2023, 15:01:40) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd:
---


======================================================================
FAIL: test_print_warning (test.test_regrtest.ArgsTestCase.test_print_warning) (option='-v')
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 1702, in test_print_warning
    output = self.run_tests(*cmd, exitcode=EXITCODE_ENV_CHANGED)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 786, in run_tests
    return self.run_python(cmdargs, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 636, in run_python
    proc = self.run_command(args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 627, in run_command
    self.fail(msg)
AssertionError: Command ['C:\\Users\\luoga\\Desktop\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-m', 'test', '--testdir=C:\\Users\\luoga\\AppData\\Local\\Temp\\tmp93duw8o3', '--fail-env-changed', '-v', 'test_regrtest_noop26'] failed with exit code 1, but exit code 3 expected!

stdout:
---
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\luoga\Desktop\cpython\Lib\test\__main__.py", line 2, in <module>
    main()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 511, in main
    Regrtest(ns).main(tests=tests)
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 503, in main
    exitcode = self.run_tests(selected, tests)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 474, in run_tests
    return self._run_tests(selected, tests)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 427, in _run_tests
    display_header()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\utils.py", line 564, in display_header
    print("== cwd:", os.getcwd())
UnicodeEncodeError: 'gbk' codec can't encode character '\xe6' in position 60: illegal multibyte sequence
== CPython 3.13.0a0 (heads/main:e57ecf6bbc, Sep 17 2023, 15:01:40) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd:
---


======================================================================
FAIL: test_threading_excepthook (test.test_regrtest.ArgsTestCase.test_threading_excepthook)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 1659, in test_threading_excepthook
    output = self.run_tests("--fail-env-changed", "-v", testname,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 786, in run_tests
    return self.run_python(cmdargs, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 636, in run_python
    proc = self.run_command(args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 627, in run_command
    self.fail(msg)
AssertionError: Command ['C:\\Users\\luoga\\Desktop\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-m', 'test', '--testdir=C:\\Users\\luoga\\AppData\\Local\\Temp\\tmpmugm4wgx', '--fail-env-changed', '-v', 'test_regrtest_noop43'] failed with exit code 1, but exit code 3 expected!

stdout:
---
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\luoga\Desktop\cpython\Lib\test\__main__.py", line 2, in <module>
    main()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 511, in main
    Regrtest(ns).main(tests=tests)
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 503, in main
    exitcode = self.run_tests(selected, tests)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 474, in run_tests
    return self._run_tests(selected, tests)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 427, in _run_tests
    display_header()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\utils.py", line 564, in display_header
    print("== cwd:", os.getcwd())
UnicodeEncodeError: 'gbk' codec can't encode character '\xe6' in position 60: illegal multibyte sequence
== CPython 3.13.0a0 (heads/main:e57ecf6bbc, Sep 17 2023, 15:01:40) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd:
---


======================================================================
FAIL: test_unraisable_exc (test.test_regrtest.ArgsTestCase.test_unraisable_exc)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 1626, in test_unraisable_exc
    output = self.run_tests("--fail-env-changed", "-v", testname,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 786, in run_tests
    return self.run_python(cmdargs, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 636, in run_python
    proc = self.run_command(args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 627, in run_command
    self.fail(msg)
AssertionError: Command ['C:\\Users\\luoga\\Desktop\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-m', 'test', '--testdir=C:\\Users\\luoga\\AppData\\Local\\Temp\\tmpyb99edxj', '--fail-env-changed', '-v', 'test_regrtest_noop45'] failed with exit code 1, but exit code 3 expected!

stdout:
---
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\luoga\Desktop\cpython\Lib\test\__main__.py", line 2, in <module>
    main()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 511, in main
    Regrtest(ns).main(tests=tests)
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 503, in main
    exitcode = self.run_tests(selected, tests)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 474, in run_tests
    return self._run_tests(selected, tests)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 427, in _run_tests
    display_header()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\utils.py", line 564, in display_header
    print("== cwd:", os.getcwd())
UnicodeEncodeError: 'gbk' codec can't encode character '\xe6' in position 60: illegal multibyte sequence
== CPython 3.13.0a0 (heads/main:e57ecf6bbc, Sep 17 2023, 15:01:40) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd:
---


======================================================================
FAIL: test_worker_decode_error (test.test_regrtest.ArgsTestCase.test_worker_decode_error)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 1801, in test_worker_decode_error
    output = self.run_tests("--fail-env-changed", "-v", "-j1", testname)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 786, in run_tests
    return self.run_python(cmdargs, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 636, in run_python
    proc = self.run_command(args, **kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\test_regrtest.py", line 627, in run_command
    self.fail(msg)
AssertionError: Command ['C:\\Users\\luoga\\Desktop\\cpython\\PCbuild\\amd64\\python.exe', '-X', 'faulthandler', '-I', '-m', 'test', '--testdir=C:\\Users\\luoga\\AppData\\Local\\Temp\\tmp_a6en_q3', '--fail-env-changed', '-v', '-j1', 'test_regrtest_noop46'] failed with exit code 1, but exit code 0 expected!

stdout:
---
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\luoga\Desktop\cpython\Lib\test\__main__.py", line 2, in <module>
    main()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 511, in main
    Regrtest(ns).main(tests=tests)
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 503, in main
    exitcode = self.run_tests(selected, tests)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 474, in run_tests
    return self._run_tests(selected, tests)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\main.py", line 427, in _run_tests
    display_header()
  File "C:\Users\luoga\Desktop\cpython\Lib\test\libregrtest\utils.py", line 564, in display_header
    print("== cwd:", os.getcwd())
UnicodeEncodeError: 'gbk' codec can't encode character '\xe6' in position 60: illegal multibyte sequence
== CPython 3.13.0a0 (heads/main:e57ecf6bbc, Sep 17 2023, 15:01:40) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd:
---


----------------------------------------------------------------------
Ran 98 tests in 22.482s

FAILED (failures=8, skipped=3)
test test_regrtest failed
test_regrtest failed (8 failures)

== Tests result: FAILURE ==

1 test failed:
    test_regrtest

Total duration: 22.6 sec
Total tests: run=98 failures=8 skipped=3
Total test files: run=1/1 failed=1
Result: FAILURE

CPython versions tested on:

CPython main branch

Operating systems tested on:

Windows

Linked PRs

• gh-109508: fix test_regrtest #109509
• gh-109508: Fix libregrtest formatting of getcwd() #109537

[littlebutt]

The reason is os.getcwd() returns result with different encoding format due to the localization of PCs. The deep solution is to modify the getcwd() function always return UTF-8 encoding format. If it is okay, I am glad to improve it.

[terryjreedy]

@vstinner Issue with test_regrtest.

[vstinner]

The reason is os.getcwd() returns result with different encoding format due to the localization of PCs

getcwd() returns a Unicode string which has no encoding.

The deep solution is to modify the getcwd() function always return UTF-8 encoding format.

getcwd() is implemented with Unicode native functions on Windows.

On Windows, it's possible to create filenames and directories with names which cannot be encoded with the ANSI code page. By the way, the OEM code page used by the Windows console can be different than the ANSI code page.

No, what is needed here is just to change how cwd is formatted. Easy way, bad: use ascii() formatter. That's bad, since the console is likely able to display most non-ASCII character.

My favorite method:

>>> encoding="gbk"
>>> name="hello\xe6"
>>> formatted = name.encode(encoding, "backslashreplace").decode(encoding)
>>> print(formatted)
hello\xe6

where encoding is sys.stdout.encoding.

I wrote PR #109537 to fix your issue. Can you test it?

[littlebutt]

The reason is os.getcwd() returns result with different encoding format due to the localization of PCs

getcwd() returns a Unicode string which has no encoding.

The deep solution is to modify the getcwd() function always return UTF-8 encoding format.

getcwd() is implemented with Unicode native functions on Windows.

On Windows, it's possible to create filenames and directories with names which cannot be encoded with the ANSI code page. By the way, the OEM code page used by the Windows console can be different than the ANSI code page.

No, what is needed here is just to change how cwd is formatted. Easy way, bad: use ascii() formatter. That's bad, since the console is likely able to display most non-ASCII character.

My favorite method:

>>> encoding="gbk"
>>> name="hello\xe6"
>>> formatted = name.encode(encoding, "backslashreplace").decode(encoding)
>>> print(formatted)
hello\xe6

where encoding is sys.stdout.encoding.

I wrote PR #109537 to fix your issue. Can you test it?

Thank you very much. I just cloned your code and ran the test. It showed okay with the change.

C:\Users\luoga\cpython>"C:\Users\luoga\cpython\PCbuild\amd64\python.exe"  -u -Wd -E -bb -m test  -v test_regrtest
== CPython 3.13.0a0 (heads/libregrtest_cwd:8b7b36719e, Sep 18 2023, 22:22:22) [MSC v.1935 64 bit (AMD64)]
== Windows-10-10.0.19045-SP0 little-endian
== Python build: release with_assert
== cwd: C:\Users\luoga\cpython\build\test_python_worker_700æ
== CPU count: 12
== encodings: locale=cp936, FS=utf-8
0:00:00 Run 1 test sequentially
0:00:00 [1/1] test_regrtest
test_cleanup (test.test_regrtest.ArgsTestCase.test_cleanup) ... ok
test_coverage (test.test_regrtest.ArgsTestCase.test_coverage) ... ok
test_crashed (test.test_regrtest.ArgsTestCase.test_crashed) ... ok
test_doctest (test.test_regrtest.ArgsTestCase.test_doctest) ... ok
test_env_changed (test.test_regrtest.ArgsTestCase.test_env_changed) ... ok
test_failing_test (test.test_regrtest.ArgsTestCase.test_failing_test) ... ok
test_forever (test.test_regrtest.ArgsTestCase.test_forever) ... ok
test_fromfile (test.test_regrtest.ArgsTestCase.test_fromfile) ... ok
...
test_tools_script_run_tests (test.test_regrtest.ProgramsTestCase.test_tools_script_run_tests) ... ok
test_format_duration (test.test_regrtest.TestUtils.test_format_duration) ... ok
test_normalize_test_name (test.test_regrtest.TestUtils.test_normalize_test_name) ... ok

----------------------------------------------------------------------
Ran 98 tests in 23.293s

OK (skipped=3)

== Tests result: SUCCESS ==

1 test OK.

Total duration: 23.6 sec
Total tests: run=98 skipped=3
Total test files: run=1/1
Result: SUCCESS

[vstinner]

Thanks for the bug report and testing my fix. I will backport this fix with all other libregrtest changes once 3.12 branch will be unblocked after 3.12.0 final release.