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kumaraditya303 · 2025-05-09T09:00:02Z

Issue: nogil segmentation fault on ordered dict operations #125996

colesbury

Would you please also provide some timing measurements for basic operations?

kumaraditya303 · 2025-07-05T13:10:14Z

colesbury

LGTM

Co-authored-by: Sam Gross <colesbury@gmail.com>

miss-islington-app · 2025-10-13T17:25:11Z

Thanks @kumaraditya303 for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14.
🐍🍒⛏🤖

miss-islington-app · 2025-10-13T17:25:13Z

Sorry, @kumaraditya303, I could not cleanly backport this to 3.14 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 6481539a6d9692ddf13ab01baad1bc9133409413 3.14

bedevere-app · 2025-10-13T17:27:52Z

GH-140053 is a backport of this pull request to the 3.14 branch.

pythonGH-133734) (cherry picked from commit 6481539) Co-authored-by: Kumar Aditya <kumaraditya@python.org>

…133734) (#140053) (cherry picked from commit 6481539)

bedevere-bot · 2025-10-13T20:56:21Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 FreeBSD Refleaks 3.14 (tier-3) has failed when building commit 5110780.

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/1800/builds/552) and take a look at the build logs.
Check if the failure is related to this commit (5110780) 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/1800/builds/552

Failed tests:

test.test_concurrent_futures.test_interpreter_pool

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1333, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1267, in _find_spec
  File "<frozen importlib._bootstrap_external>", line 1296, in find_spec
  File "<frozen importlib._bootstrap_external>", line 1270, in _get_spec
  File "<frozen importlib._bootstrap_external>", line 1388, in find_spec
  File "<frozen importlib._bootstrap_external>", line 166, in _path_isfile
  File "<frozen importlib._bootstrap_external>", line 158, in _path_is_mode_type
  File "<frozen importlib._bootstrap_external>", line 152, in _path_stat
ValueError: embedded null byte
Exception in initializer:
RuntimeError: Failed to import encodings module


Traceback (most recent call last):
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/futures/thread.py", line 99, in _worker
    ctx.initialize()
    ~~~~~~~~~~~~~~^^
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/futures/interpreter.py", line 62, in initialize
    self.interp = interpreters.create()
                  ~~~~~~~~~~~~~~~~~~~^^
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/interpreters/__init__.py", line 65, in create
    id = _interpreters.create(reqrefs=True)
concurrent.interpreters.InterpreterError: interpreter creation failed
Timeout (0:45:00)!
Thread 0x000000084442aa00 [InterpreterPoolExec] (most recent call first):
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/interpreters/__init__.py", line 220 in _call
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/interpreters/__init__.py", line 238 in call
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/futures/interpreter.py", line 85 in run
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/futures/thread.py", line 86 in run
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/futures/thread.py", line 119 in _worker
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/threading.py", line 1023 in run
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/threading.py", line 1081 in _bootstrap_inner
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/threading.py", line 1043 in _bootstrap


Traceback (most recent call last):
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/futures/thread.py", line 99, in _worker
    ctx.initialize()
    ~~~~~~~~~~~~~~^^
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/futures/interpreter.py", line 62, in initialize
    self.interp = interpreters.create()
                  ~~~~~~~~~~~~~~~~~~~^^
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/interpreters/__init__.py", line 65, in create
    id = _interpreters.create(reqrefs=True)
concurrent.interpreters.InterpreterError: interpreter creation failed
Timeout (0:45:00)!
Thread 0x00000008415fb800 [InterpreterPoolExec] (most recent call first):
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/concurrent/futures/thread.py", line 116 in _worker
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/threading.py", line 1023 in run
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/threading.py", line 1081 in _bootstrap_inner
  File "/buildbot/buildarea/3.14.ware-freebsd.refleak/build/Lib/threading.py", line 1043 in _bootstrap

bedevere-app Bot mentioned this pull request May 9, 2025

nogil segmentation fault on ordered dict operations #125996

Closed

kumaraditya303 marked this pull request as ready for review May 13, 2025 09:08

kumaraditya303 requested review from markshannon and methane as code owners May 13, 2025 09:08

bedevere-app Bot added the awaiting core review label May 13, 2025

kumaraditya303 requested a review from colesbury May 13, 2025 09:08

picnixz reviewed May 17, 2025

View reviewed changes

Comment thread Include/internal/pycore_dict.h Outdated

Comment thread Objects/odictobject.c Outdated

Comment thread Objects/odictobject.c Outdated

Comment thread Objects/odictobject.c Outdated

Comment thread Objects/odictobject.c Outdated

Comment thread Objects/odictobject.c Outdated

colesbury reviewed May 27, 2025

View reviewed changes

Comment thread Objects/odictobject.c Outdated

Comment thread Objects/odictobject.c Outdated

Comment thread Objects/odictobject.c Outdated

kumaraditya303 added the topic-free-threading label Jun 23, 2025

kumaraditya303 and others added 5 commits July 5, 2025 17:23

fix thread safety of ordered dict

1373660

📜🤖 Added by blurb_it.

72ba12a

fmt

bbd7487

use lock held clear of dict

ef2aed1

remove unused function

473cfa0

kumaraditya303 force-pushed the ordereddict branch from e87cd54 to 473cfa0 Compare July 5, 2025 11:53

kumaraditya303 added 2 commits July 5, 2025 18:22

use critical section on iterator

4bf573e

use PyDict_Clear

9d1ae53

Merge remote-tracking branch 'upstream/main' into ordereddict

587dae8

kumaraditya303 added the needs backport to 3.14 bugs and security fixes label Oct 8, 2025

kumaraditya303 requested a review from colesbury October 8, 2025 14:19

methane approved these changes Oct 9, 2025

View reviewed changes

bedevere-app Bot added awaiting merge and removed awaiting core review labels Oct 9, 2025

colesbury approved these changes Oct 13, 2025

View reviewed changes

Comment thread Objects/odictobject.c Outdated

kumaraditya303 and others added 2 commits October 13, 2025 22:21

Update Objects/odictobject.c

4d8e596

Co-authored-by: Sam Gross <colesbury@gmail.com>

Merge branch 'main' into ordereddict

22b3b72

kumaraditya303 merged commit 6481539 into python:main Oct 13, 2025
45 checks passed

bedevere-app Bot removed the awaiting merge label Oct 13, 2025

kumaraditya303 deleted the ordereddict branch October 13, 2025 17:25

miss-islington-app Bot assigned kumaraditya303 Oct 13, 2025

bedevere-app Bot removed the needs backport to 3.14 bugs and security fixes label Oct 13, 2025

kumaraditya303 added a commit to kumaraditya303/cpython that referenced this pull request Oct 13, 2025

[3.14] pythongh-125996: fix thread safety of collections.OrderedDict (

0d55084

pythonGH-133734) (cherry picked from commit 6481539) Co-authored-by: Kumar Aditya <kumaraditya@python.org>

kumaraditya303 added a commit that referenced this pull request Oct 13, 2025

[3.14] gh-125996: fix thread safety of collections.OrderedDict (GH-…

5110780

…133734) (#140053) (cherry picked from commit 6481539)

colesbury mentioned this pull request Dec 15, 2025

thread-safety issue in pure-Python zoneinfo cache on 3.13t #142763

Closed

robertsdotpm mentioned this pull request Jun 29, 2026

OrderedDict: iterator constructor odictiter_new is unlocked under free-threading -- use-after-free SIGSEGV (GH-133734 follow-up to gh-125996) #152537

Closed

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miss-islington-app Bot commented Oct 13, 2025

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bedevere-app Bot commented Oct 13, 2025

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bedevere-bot commented Oct 13, 2025

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

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kumaraditya303 commented May 9, 2025 •

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