gh-129483: Make `TestLocalTimeDisambiguation`'s time format locale independent #142193

gkirchou · 2025-12-02T15:23:53Z

Test with:

./configure --enable-optimizations --with-lto
make -s -j $(nproc);

Issue: Python 3.13.1 test_datetime failures #129483

StanFromIreland

IMO making the tests locale independent would be a better solution than this (i.e. just replace %c with our desired order).

gkirchou · 2025-12-03T00:58:15Z

IMO making the tests locale independent would be a better solution than this (i.e. just replace %c with our desired order).

Addressed

StanFromIreland

LGTM, thanks!

python-cla-bot · 2025-12-03T10:09:21Z

All commit authors signed the Contributor License Agreement.

vstinner

LGTM

pganssle · 2025-12-04T13:33:37Z

This is failing in 3.13, right? So we should backport it? Anyone know how far back it is causing issues?

miss-islington-app · 2025-12-04T13:37:32Z

Thanks @gkirchou for the PR, and @pganssle for merging it 🌮🎉.. I'm working now to backport this PR to: 3.14.
🐍🍒⛏🤖

…ale independent (pythonGH-142193) * Change to update %c to the exact time format. --------- (cherry picked from commit 8392095) Co-authored-by: Kir Chou <148194051+gkirchou@users.noreply.github.com> Co-authored-by: Kir Chou <note351@hotmail.com>

bedevere-app · 2025-12-04T13:37:51Z

GH-142258 is a backport of this pull request to the 3.14 branch.

miss-islington-app · 2025-12-04T13:38:15Z

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

…ale independent (pythonGH-142193) * Change to update %c to the exact time format. --------- (cherry picked from commit 8392095) Co-authored-by: Kir Chou <148194051+gkirchou@users.noreply.github.com> Co-authored-by: Kir Chou <note351@hotmail.com>

bedevere-app · 2025-12-04T13:38:27Z

GH-142259 is a backport of this pull request to the 3.13 branch.

vstinner · 2025-12-04T13:40:04Z

This is failing in 3.13, right? So we should backport it? Anyone know how far back it is causing issues?

Right, the issue was reported on Python 3.13.1. We should backport the change to 3.13 and 3.14 branches. Other branches no longer accept bugfixes.

…cale independent (GH-142193) (#142259) gh-129483: Make `TestLocalTimeDisambiguation`'s time format locale independent (GH-142193) * Change to update %c to the exact time format. --------- (cherry picked from commit 8392095) Co-authored-by: Kir Chou <148194051+gkirchou@users.noreply.github.com> Co-authored-by: Kir Chou <note351@hotmail.com>

…cale independent (GH-142193) (#142258) gh-129483: Make `TestLocalTimeDisambiguation`'s time format locale independent (GH-142193) * Change to update %c to the exact time format. --------- (cherry picked from commit 8392095) Co-authored-by: Kir Chou <148194051+gkirchou@users.noreply.github.com> Co-authored-by: Kir Chou <note351@hotmail.com>

bedevere-bot · 2025-12-04T15:06:40Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Stable LTO + PGO 3.13 (tier-3) has failed when building commit e68066e.

What do you need to do:

Don't panic.
Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1633/builds/552) and take a look at the build logs.
Check if the failure is related to this commit (e68066e) or if it is a false positive.
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/1633/builds/552

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

Click to see traceback logs

remote: Enumerating objects: 5, done.        
remote: Counting objects:  20% (1/5)        
remote: Counting objects:  40% (2/5)        
remote: Counting objects:  60% (3/5)        
remote: Counting objects:  80% (4/5)        
remote: Counting objects: 100% (5/5)        
remote: Counting objects: 100% (5/5), done.        
remote: Total 5 (delta 4), reused 4 (delta 4), pack-reused 0 (from 0)        
From https://github.com/python/cpython
 * branch                    3.13       -> FETCH_HEAD
Note: switching to 'e68066eb0957f5cad8e8959ea8f3f681bfda0994'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at e68066eb095 [3.13] gh-129483: Make `TestLocalTimeDisambiguation`'s time format locale independent (GH-142193) (#142259)
Switched to and reset branch '3.13'

find: ‘build’: No such file or directory
find: ‘build’: No such file or directory
find: ‘build’: No such file or directory
find: ‘build’: No such file or directory
make[2]: [Makefile:3127: clean-retain-profile] Error 1 (ignored)
In function ‘hashtable_key_from_2_strings’,
    inlined from ‘_extensions_cache_find_unlocked’ at Python/import.c:1264:17:
Python/import.c:1177:5: warning: ‘strncpy’ output truncated before terminating nul copying as many bytes from a string as its length [-Wstringop-truncation]
 1177 |     strncpy(key, str1_data, str1_len);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Python/import.c:1163:27: note: length computed here
 1163 |     Py_ssize_t str1_len = strlen(str1_data);
      |                           ^~~~~~~~~~~~~~~~~
test_denial_of_service_prevented_int_to_str (test.test_int.IntStrDigitLimitsTests.test_denial_of_service_prevented_int_to_str)
Regression test: ensure we fail before performing O(N**2) work. ... ok
test_denial_of_service_prevented_str_to_int (test.test_int.IntStrDigitLimitsTests.test_denial_of_service_prevented_str_to_int)
Regression test: ensure we fail before performing O(N**2) work. ... ok
test_disabled_limit (test.test_int.IntStrDigitLimitsTests.test_disabled_limit) ... ok
test_int_from_other_bases (test.test_int.IntStrDigitLimitsTests.test_int_from_other_bases) ... ok
test_int_max_str_digits_is_per_interpreter (test.test_int.IntStrDigitLimitsTests.test_int_max_str_digits_is_per_interpreter) ... ok
test_max_str_digits (test.test_int.IntStrDigitLimitsTests.test_max_str_digits) ... ok
test_max_str_digits_edge_cases (test.test_int.IntStrDigitLimitsTests.test_max_str_digits_edge_cases)
Ignore the +/- sign and space padding. ... ok
test_power_of_two_bases_unlimited (test.test_int.IntStrDigitLimitsTests.test_power_of_two_bases_unlimited)
The limit does not apply to power of 2 bases. ... ok
test_sign_not_counted (test.test_int.IntStrDigitLimitsTests.test_sign_not_counted) ... ok
test_underscores_ignored (test.test_int.IntStrDigitLimitsTests.test_underscores_ignored) ... ok
test_denial_of_service_prevented_int_to_str (test.test_int.IntSubclassStrDigitLimitsTests.test_denial_of_service_prevented_int_to_str)
Regression test: ensure we fail before performing O(N**2) work. ... ok
test_denial_of_service_prevented_str_to_int (test.test_int.IntSubclassStrDigitLimitsTests.test_denial_of_service_prevented_str_to_int)
Regression test: ensure we fail before performing O(N**2) work. ... FAIL
test_disabled_limit (test.test_int.IntSubclassStrDigitLimitsTests.test_disabled_limit) ... ok
test_int_from_other_bases (test.test_int.IntSubclassStrDigitLimitsTests.test_int_from_other_bases) ... ok
test_int_max_str_digits_is_per_interpreter (test.test_int.IntSubclassStrDigitLimitsTests.test_int_max_str_digits_is_per_interpreter) ... ok
test_max_str_digits (test.test_int.IntSubclassStrDigitLimitsTests.test_max_str_digits) ... ok
test_max_str_digits_edge_cases (test.test_int.IntSubclassStrDigitLimitsTests.test_max_str_digits_edge_cases)
Ignore the +/- sign and space padding. ... ok
test_power_of_two_bases_unlimited (test.test_int.IntSubclassStrDigitLimitsTests.test_power_of_two_bases_unlimited)
The limit does not apply to power of 2 bases. ... ok
test_sign_not_counted (test.test_int.IntSubclassStrDigitLimitsTests.test_sign_not_counted) ... ok
test_underscores_ignored (test.test_int.IntSubclassStrDigitLimitsTests.test_underscores_ignored) ... ok
test_basic (test.test_int.IntTestCases.test_basic) ... ok
test_error_message (test.test_int.IntTestCases.test_error_message) ... ok
test_int_base_bad_types (test.test_int.IntTestCases.test_int_base_bad_types)
Not integer types are not valid bases; issue16772. ... ok
test_int_base_indexable (test.test_int.IntTestCases.test_int_base_indexable) ... ok
test_int_base_limits (test.test_int.IntTestCases.test_int_base_limits)
Testing the supported limits of the int() base parameter. ... ok
test_int_memoryview (test.test_int.IntTestCases.test_int_memoryview) ... ok
test_int_returns_int_subclass (test.test_int.IntTestCases.test_int_returns_int_subclass) ... ok
test_int_subclass_with_index (test.test_int.IntTestCases.test_int_subclass_with_index) ... ok
test_int_subclass_with_int (test.test_int.IntTestCases.test_int_subclass_with_int) ... ok
test_intconversion (test.test_int.IntTestCases.test_intconversion) ... ok
test_invalid_signs (test.test_int.IntTestCases.test_invalid_signs) ... ok
test_issue31619 (test.test_int.IntTestCases.test_issue31619) ... ok
test_keyword_args (test.test_int.IntTestCases.test_keyword_args) ... ok
test_no_args (test.test_int.IntTestCases.test_no_args) ... ok
test_non_numeric_input_types (test.test_int.IntTestCases.test_non_numeric_input_types) ... ok
test_small_ints (test.test_int.IntTestCases.test_small_ints) ... ok
test_string_float (test.test_int.IntTestCases.test_string_float) ... ok
test_underscores (test.test_int.IntTestCases.test_underscores) ... ok
test_unicode (test.test_int.IntTestCases.test_unicode) ... ok
test_pylong_int_divmod (test.test_int.PyLongModuleTests.test_pylong_int_divmod) ... ok
test_pylong_int_to_decimal (test.test_int.PyLongModuleTests.test_pylong_int_to_decimal) ... ok
test_pylong_int_to_decimal_2 (test.test_int.PyLongModuleTests.test_pylong_int_to_decimal_2) ... skipped "resource 'cpu' is not enabled"
test_pylong_misbehavior_error_path_from_str (test.test_int.PyLongModuleTests.test_pylong_misbehavior_error_path_from_str) ... ok
test_pylong_misbehavior_error_path_to_str (test.test_int.PyLongModuleTests.test_pylong_misbehavior_error_path_to_str) ... ok
test_pylong_roundtrip (test.test_int.PyLongModuleTests.test_pylong_roundtrip) ... ok
test_pylong_str_to_int (test.test_int.PyLongModuleTests.test_pylong_str_to_int) ... ok

======================================================================
FAIL: test_denial_of_service_prevented_str_to_int (test.test_int.IntSubclassStrDigitLimitsTests.test_denial_of_service_prevented_str_to_int)
Regression test: ensure we fail before performing O(N**2) work.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/buildbot/buildarea/3.13.cstratak-fedora-stable-s390x.lto-pgo/build/Lib/test/test_int.py", line 740, in test_denial_of_service_prevented_str_to_int
    self.assertLessEqual(sw_fail_extra_huge.seconds, sw_convert.seconds/2)
    ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 0.09443029399999858 not less than or equal to 0.022935383500000128

----------------------------------------------------------------------
Ran 46 tests in 1.140s

FAILED (failures=1, skipped=1)
test test_int failed
make: *** [Makefile:906: profile-run-stamp] Error 2

…ale independent (python#142193) * Change to update %c to the exact time format. --------- Co-authored-by: Kir Chou <note351@hotmail.com>

Force TestLocalTimeDisambiguation to run on LC_ALL=C

31a11cd

gkirchou requested review from abalkin and pganssle as code owners December 2, 2025 15:23

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Python 3.13.1 test_datetime failures #129483

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bedevere-app bot added the awaiting review label Dec 2, 2025

StanFromIreland reviewed Dec 2, 2025

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Change to update %c to the exact time format.

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gkirchou changed the title ~~gh-129483: Force TestLocalTimeDisambiguation to run on LC_ALL=C~~ gh-129483: Clarify TestLocalTimeDisambiguation's time format Dec 3, 2025

gkirchou requested a review from StanFromIreland December 3, 2025 01:19

StanFromIreland added the skip news label Dec 3, 2025

StanFromIreland changed the title ~~gh-129483: Clarify TestLocalTimeDisambiguation's time format~~ gh-129483: Make TestLocalTimeDisambiguation's time format locale independent Dec 3, 2025

StanFromIreland approved these changes Dec 3, 2025

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bedevere-app bot added awaiting core review and removed awaiting review labels Dec 3, 2025

Merge branch 'main' into pythongh-129483

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vstinner approved these changes Dec 3, 2025

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bedevere-app bot added awaiting merge and removed awaiting core review labels Dec 3, 2025

Merge branch 'main' into pythongh-129483

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pganssle merged commit 8392095 into python:main Dec 4, 2025
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bedevere-app bot removed the awaiting merge label Dec 4, 2025

vstinner added the needs backport to 3.14 bugs and security fixes label Dec 4, 2025

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bedevere-app bot removed the needs backport to 3.13 bugs and security fixes label Dec 4, 2025

gkirchou deleted the gh-129483 branch December 8, 2025 04:52

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gh-129483: Make TestLocalTimeDisambiguation's time format locale independent #142193

gh-129483: Make TestLocalTimeDisambiguation's time format locale independent #142193

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gh-129483: Make `TestLocalTimeDisambiguation`'s time format locale independent #142193

gh-129483: Make `TestLocalTimeDisambiguation`'s time format locale independent #142193

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