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GeezerVison is showing github.com — gh-157159: improve the tabnanny usage message by gpshead · Pull Request #157160 · python/cpython

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@gpshead

@gpshead gpshead commented Sep 8, 2026 •
edited by bedevere-app Bot
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The usage message embedded sys.argv[0], which under python -m tabnanny is the absolute path of tabnanny.py, and a meaningless virtual path when the standard library is in a zip archive or embedded in an executable. Print f"Usage: {sys.executable} -m tabnanny [-v] file_or_directory ..." instead, and make the test expect that form instead of a file that may not exist.

  • Issue: tabnanny help message test is over-pedantic #157159

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@gpshead
pythongh-157159: improve the tabnanny usage message
513907a 
The usage message embedded sys.argv[0], which under `python -m tabnanny`
is the absolute path of tabnanny.py, and a meaningless virtual path when
the standard library is in a zip archive or embedded in an executable.
Print f"Usage: {sys.executable} -m tabnanny [-v] file_or_directory ..."
instead, and make the test expect that fixed form.
@gpshead gpshead self-assigned this Sep 8, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Sep 8, 2026
tabnanny help message test is over-pedantic #157159
Closed
@bedevere-app bedevere-app Bot added the awaiting core review label Sep 8, 2026
@gpshead
gpshead enabled auto-merge (squash) September 8, 2026 04:25
@gpshead gpshead added needs backport to 3.13 only security fixes needs backport to 3.14 bugs and security fixes needs backport to 3.15 bugs and security fixes labels Sep 8, 2026
@gpshead
gpshead merged commit 5ddd59f into python:main Sep 8, 2026
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@miss-islington-app

miss-islington-app Bot commented Sep 8, 2026

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Thanks @gpshead for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14, 3.15.
🐍🍒⛏🤖 I'm not a witch! I'm not a witch!
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@bedevere-app bedevere-app Bot removed the awaiting core review label Sep 8, 2026
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bedevere-app Bot commented Sep 8, 2026

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GH-157163 is a backport of this pull request to the 3.15 branch.
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@bedevere-app bedevere-app Bot removed the needs backport to 3.15 bugs and security fixes label Sep 8, 2026
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bedevere-app Bot commented Sep 8, 2026

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GH-157164 is a backport of this pull request to the 3.14 branch.
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@bedevere-app bedevere-app Bot removed the needs backport to 3.14 bugs and security fixes label Sep 8, 2026
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bedevere-app Bot commented Sep 8, 2026

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GH-157166 is a backport of this pull request to the 3.13 branch.
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@bedevere-app bedevere-app Bot removed the needs backport to 3.13 only security fixes label Sep 8, 2026
gpshead added a commit that referenced this pull request Sep 8, 2026
@miss-islington @gpshead
[3.13] gh-157159: improve the tabnanny usage message (GH-157160) (#15…
59f15f3 
…7166)

gh-157159: improve the tabnanny usage message (GH-157160)

The usage message embedded sys.argv[0], which under `python -m tabnanny`
is the absolute path of tabnanny.py, and a meaningless virtual path when
the standard library is in a zip archive or embedded in an executable.
Print f"Usage: {sys.executable} -m tabnanny [-v] file_or_directory ..."
instead, and make the test expect that fixed form.
(cherry picked from commit 5ddd59f)

Co-authored-by: Gregory P. Smith <[email protected]>
gpshead added a commit that referenced this pull request Sep 8, 2026
@miss-islington @gpshead
[3.14] gh-157159: improve the tabnanny usage message (GH-157160) (#15…
aa41833 
…7164)

gh-157159: improve the tabnanny usage message (GH-157160)

The usage message embedded sys.argv[0], which under `python -m tabnanny`
is the absolute path of tabnanny.py, and a meaningless virtual path when
the standard library is in a zip archive or embedded in an executable.
Print f"Usage: {sys.executable} -m tabnanny [-v] file_or_directory ..."
instead, and make the test expect that fixed form.
(cherry picked from commit 5ddd59f)

Co-authored-by: Gregory P. Smith <[email protected]>
hugovk pushed a commit that referenced this pull request Sep 8, 2026
@miss-islington @gpshead
[3.15] gh-157159: improve the tabnanny usage message (GH-157160) (#15…
cf312cf 
…7163)

gh-157159: improve the tabnanny usage message (GH-157160)

The usage message embedded sys.argv[0], which under `python -m tabnanny`
is the absolute path of tabnanny.py, and a meaningless virtual path when
the standard library is in a zip archive or embedded in an executable.
Print f"Usage: {sys.executable} -m tabnanny [-v] file_or_directory ..."
instead, and make the test expect that fixed form.
(cherry picked from commit 5ddd59f)

Co-authored-by: Gregory P. Smith <[email protected]>
@bedevere-bot

bedevere-bot commented Sep 8, 2026

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⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Arch Linux Asan Debug 3.13 (tierless) has failed when building commit 59f15f3.

What do you need to do:

  1. Don't panic.
  2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
  3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1439/builds/1222) and take a look at the build logs.
  4. Check if the failure is related to this commit (59f15f3) or if it is a false positive.
  5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1439/builds/1222

Failed tests:

  • test_io

Failed subtests:

  • test_daemon_threads_shutdown_stdout_deadlock - test.test_io.CMiscIOTest.test_daemon_threads_shutdown_stdout_deadlock
  • test_daemon_threads_shutdown_stderr_deadlock - test.test_io.CMiscIOTest.test_daemon_threads_shutdown_stderr_deadlock

Summary of the results of the build (if available):

==

Click to see traceback logs 
Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan_debug/build/Lib/test/test_io.py", line 4821, in test_daemon_threads_shutdown_stderr_deadlock
    self.check_daemon_threads_shutdown_deadlock('stderr')
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan_debug/build/Lib/test/test_io.py", line 4809, in check_daemon_threads_shutdown_deadlock
    self.assertRegex(err, pattern)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
AssertionError: Regex didn't match: "Fatal Python error: _enter_buffered_busy: could not acquire lock for <(_io\\.)?BufferedWriter name='<stderr>'> at interpreter shutdown, possibly due to daemon threads" not found in '....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................


Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan_debug/build/Lib/test/test_io.py", line 4821, in test_daemon_threads_shutdown_stderr_deadlock
    self.check_daemon_threads_shutdown_deadlock('stderr')
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan_debug/build/Lib/test/test_io.py", line 4809, in check_daemon_threads_shutdown_deadlock
    self.assertRegex(err, pattern)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
AssertionError: Regex didn't match: "Fatal Python error: _enter_buffered_busy: could not acquire lock for <(_io\\.)?BufferedWriter name='<stderr>'> at interpreter shutdown, possibly due to daemon threads" not found in '...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................


Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan_debug/build/Lib/test/test_io.py", line 4816, in test_daemon_threads_shutdown_stdout_deadlock
    self.check_daemon_threads_shutdown_deadlock('stdout')
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan_debug/build/Lib/test/test_io.py", line 4809, in check_daemon_threads_shutdown_deadlock
    self.assertRegex(err, pattern)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
AssertionError: Regex didn't match: "Fatal Python error: _enter_buffered_busy: could not acquire lock for <(_io\\.)?BufferedWriter name='<stdout>'> at interpreter shutdown, possibly due to daemon threads" not found in '=================================================================\n==350361==ERROR: AddressSanitizer: heap-use-after-free on address 0x7caaf2870d68 at pc 0x55ee59b832c7 bp 0x7b7af05fdff0 sp 0x7b7af05fdfe0\nREAD of size 8 at 0x7caaf2870d68 thread T1\n    #0 0x55ee59b832c6 in _Py_atomic_load_uintptr_relaxed Include/cpython/pyatomic_gcc.h:347\n    #1 0x55ee59b832c6 in _Py_eval_breaker_bit_is_set Include/internal/pycore_ceval.h:292\n    #2 0x55ee59b832c6 in drop_gil Python/ceval_gil.c:266\n    #3 0x55ee59b85286 in _PyEval_ReleaseLock Python/ceval_gil.c:603\n    #4 0x55ee59bf113f in detach_thread Python/pystate.c:2152\n    #5 0x55ee59bf392f in _PyThreadState_Detach Python/pystate.c:2158\n    #6 0x55ee59b85476 in PyEval_SaveThread Python/ceval_gil.c:647\n    #7 0x55ee59cbe071 in _enter_buffered_busy Modules/_io/bufferedio.c:302\n    #8 0x55ee59cc32ae in _io_BufferedWriter_write_impl Modules/_io/bufferedio.c:2078\n    #9 0x55ee59cc4271 in _io_BufferedWriter_write Modules/_io/clinic/bufferedio.c.h:1095\n    #10 0x55ee598a21af in method_vectorcall_O Objects/descrobject.c:475\n    #11 0x55ee59885b0d in _PyObject_VectorcallTstate Include/internal/pycore_call.h:168\n    #12 0x55ee59887448 in PyObject_VectorcallMethod Objects/call.c:857\n    #13 0x55ee59ccb70e in PyObject_CallMethodOneArg Include/cpython/abstract.h:74\n    #14 0x55ee59cd0539 in _textiowrapper_writeflush Modules/_io/textio.c:1631\n    #15 0x55ee59cd0cdc in _io_TextIOWrapper_flush_impl Modules/_io/textio.c:3121\n    #16 0x55ee59cd0f2b in _io_TextIOWrapper_flush Modules/_io/clinic/textio.c.h:1111\n    #17 0x55ee59aeb262 in _PyEval_EvalFrameDefault Python/generated_cases.c.h:1753\n    #18 0x55ee59b0dc69 in _PyEval_EvalFrame Include/internal/pycore_ceval.h:120\n    #19 0x55ee59b0de56 in _PyEval_Vector Python/ceval.c:1820\n    #20 0x55ee5988560a in _PyFunction_Vectorcall Objects/call.c:413\n    #21 0x55ee5988b6f0 in _PyObject_VectorcallTstate Include/internal/pycore_call.h:168\n    #22 0x55ee5988bba1 in method_vectorcall Objects/classobject.c:71\n    #23 0x55ee59888f3a in _PyVectorcall_Call Objects/call.c:273\n    #24 0x55ee5988943d in _PyObject_Call Objects/call.c:348\n    #25 0x55ee59889484 in PyObject_Call Objects/call.c:373\n    #26 0x55ee59d2736c in thread_run Modules/_threadmodule.c:343\n    #27 0x55ee59c28acd in pythread_wrapper Python/thread_pthread.h:242\n    #28 0x7f7af3e61858  (/usr/lib/libasan.so.8+0x61858) (BuildId: b28f87d70f4aadfdfe6abce3776c226f5569bd6a)\n    #29 0x7f7af3a97738  (/usr/lib/libc.so.6+0x97738) (BuildId: d8ceb52a8c6e1fefece4ca75f7396d1d5bffc565)\n    #30 0x7f7af3b1bedb  (/usr/lib/libc.so.6+0x11bedb) (BuildId: d8ceb52a8c6e1fefece4ca75f7396d1d5bffc565)\n\n0x7caaf2870d68 is located 40 bytes inside of 368-byte region [0x7caaf2870d40,0x7caaf2870eb0)\nfreed by thread T0 here:\n    #0 0x7f7af3f2ae91  (/usr/lib/libasan.so.8+0x12ae91) (BuildId: b28f87d70f4aadfdfe6abce3776c226f5569bd6a)\n    #1 0x55ee59942b0f in _PyMem_RawFree Objects/obmalloc.c:90\n    #2 0x55ee59944da1 in _PyMem_DebugRawFree Objects/obmalloc.c:2860\n    #3 0x55ee5996babd in PyMem_RawFree Objects/obmalloc.c:1005\n    #4 0x55ee59bf0318 in free_threadstate Python/pystate.c:1471\n    #5 0x55ee59bf6671 in _PyThreadState_DeleteList Python/pystate.c:1941\n    #6 0x55ee59bec89f in _Py_Finalize Python/pylifecycle.c:2092\n    #7 0x55ee59beca1d in Py_FinalizeEx Python/pylifecycle.c:2261\n    #8 0x55ee59c5321e in Py_RunMain Modules/main.c:836\n    #9 0x55ee59c533fa in pymain_main Modules/main.c:864\n    #10 0x55ee59c53785 in Py_BytesMain Modules/main.c:888\n    #11 0x55ee596f4a81 in main Programs/python.c:15\n    #12 0x7f7af3a27740  (/usr/lib/libc.so.6+0x27740) (BuildId: d8ceb52a8c6e1fefece4ca75f7396d1d5bffc565)\n    #13 0x7f7af3a27878 in __libc_start_main (/usr/lib/libc.so.6+0x27878) (BuildId: d8ceb52a8c6e1fefece4ca75f7396d1d5bffc565)\n    #14 0x55ee596f49a4 in _start (/buildbot/b


Traceback (most recent call last):
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan_debug/build/Lib/test/test_io.py", line 4816, in test_daemon_threads_shutdown_stdout_deadlock
    self.check_daemon_threads_shutdown_deadlock('stdout')
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/buildbot/buildarea/3.13.pablogsal-arch-x86_64.asan_debug/build/Lib/test/test_io.py", line 4809, in check_daemon_threads_shutdown_deadlock
    self.assertRegex(err, pattern)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
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clin1234 pushed a commit to clin1234/cpython that referenced this pull request Sep 12, 2026
@gpshead @clin1234
pythongh-157159: improve the tabnanny usage message (pythonGH-157160)
a6b922f 
The usage message embedded sys.argv[0], which under `python -m tabnanny`
is the absolute path of tabnanny.py, and a meaningless virtual path when
the standard library is in a zip archive or embedded in an executable.
Print f"Usage: {sys.executable} -m tabnanny [-v] file_or_directory ..."
instead, and make the test expect that fixed form.
johnslavik pushed a commit to johnslavik/cpython that referenced this pull request Sep 14, 2026
@gpshead @johnslavik
pythongh-157159: improve the tabnanny usage message (pythonGH-157160)
d226940 
The usage message embedded sys.argv[0], which under `python -m tabnanny`
is the absolute path of tabnanny.py, and a meaningless virtual path when
the standard library is in a zip archive or embedded in an executable.
Print f"Usage: {sys.executable} -m tabnanny [-v] file_or_directory ..."
instead, and make the test expect that fixed form.
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