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efimov-mikhail · 2025-11-11T10:42:30Z

Issue: CALL_LIST_APPEND specialization can make no progress #141367

…e-141367.I5KY7F.rst Co-authored-by: Ken Jin <kenjin4096@gmail.com>

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bedevere-bot · 2025-11-14T23:12:44Z

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 FreeBSD Refleaks 3.x (tier-3) has failed when building commit 1281be1.

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/1613/builds/2354) and take a look at the build logs.
Check if the failure is related to this commit (1281be1) 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/1613/builds/2354

Test leaking resources:

test_events: memory blocks
test_events: references

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

==

Click to see traceback logs

Traceback (most recent call last):
  File "/buildbot/buildarea/3.x.ware-freebsd.refleak/build/Lib/test/support/__init__.py", line 847, in gc_collect
    gc.collect()
    ~~~~~~~~~~^^
ResourceWarning: unclosed <socket.socket fd=9, family=2, type=1, proto=6, laddr=('127.0.0.1', 36214), raddr=('127.0.0.1', 36215)>
Task was destroyed but it is pending!
task: <Task pending name='Task-552' coro=<BaseSelectorEventLoop._accept_connection2() done, defined at /buildbot/buildarea/3.x.ware-freebsd.refleak/build/Lib/asyncio/selector_events.py:217> wait_for=<Future pending cb=[Task.task_wakeup()]>>
Warning -- Unraisable exception
Exception ignored while calling deallocator <function _SelectorTransport.__del__ at 0x846379610>:
Traceback (most recent call last):
  File "/buildbot/buildarea/3.x.ware-freebsd.refleak/build/Lib/asyncio/selector_events.py", line 873, in __del__
    _warn(f"unclosed transport {self!r}", ResourceWarning, source=self)
    ~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ResourceWarning: unclosed transport <_SelectorSocketTransport closing fd=9>
k


Traceback (most recent call last):
  File "/buildbot/buildarea/3.x.ware-freebsd.refleak/build/Lib/test/support/__init__.py", line 847, in gc_collect
    gc.collect()
    ~~~~~~~~~~^^
ResourceWarning: unclosed <socket.socket fd=10, family=2, type=1, proto=6, laddr=('127.0.0.1', 63761), raddr=('127.0.0.1', 63762)>
Task was destroyed but it is pending!
task: <Task pending name='Task-3618' coro=<BaseSelectorEventLoop._accept_connection2() done, defined at /buildbot/buildarea/3.x.ware-freebsd.refleak/build/Lib/asyncio/selector_events.py:217> wait_for=<Future pending cb=[Task.task_wakeup()]>>
Warning -- Unraisable exception
Exception ignored while calling deallocator <function _SelectorTransport.__del__ at 0x843f19610>:
Traceback (most recent call last):
  File "/buildbot/buildarea/3.x.ware-freebsd.refleak/build/Lib/asyncio/selector_events.py", line 873, in __del__
    _warn(f"unclosed transport {self!r}", ResourceWarning, source=self)
    ~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ResourceWarning: unclosed transport <_SelectorSocketTransport closing fd=10>
k

Fidget-Spinner · 2025-11-14T23:16:36Z

… for list subclasses (pythonGH-141398) Co-authored-by: Ken Jin <kenjin4096@gmail.com>

Add fix, test, NEWS

f3b579b

bedevere-app Bot added the awaiting review label Nov 11, 2025

efimov-mikhail requested a review from Fidget-Spinner November 11, 2025 10:42

bedevere-app Bot mentioned this pull request Nov 11, 2025

CALL_LIST_APPEND specialization can make no progress #141367

Closed

Fidget-Spinner reviewed Nov 11, 2025

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Comment thread Misc/NEWS.d/next/Core_and_Builtins/2025-11-11-13-40-45.gh-issue-141367.I5KY7F.rst Outdated

Address Mark's comments

01c36df

efimov-mikhail requested a review from markshannon as a code owner November 11, 2025 16:31

Update Misc/NEWS.d/next/Core_and_Builtins/2025-11-11-13-40-45.gh-issu…

6f55c68

…e-141367.I5KY7F.rst Co-authored-by: Ken Jin <kenjin4096@gmail.com>

efimov-mikhail requested a review from Fidget-Spinner November 11, 2025 16:34

Fidget-Spinner approved these changes Nov 11, 2025

View reviewed changes

bedevere-app Bot added awaiting merge and removed awaiting review labels Nov 11, 2025

Fidget-Spinner merged commit 1281be1 into python:main Nov 14, 2025
74 checks passed

bedevere-app Bot removed the awaiting merge label Nov 14, 2025

StanFromIreland pushed a commit to StanFromIreland/cpython that referenced this pull request Dec 6, 2025

pythongh-141367: Use CALL_LIST_APPEND instruction only for lists, not…

dd905f2

… for list subclasses (pythonGH-141398) Co-authored-by: Ken Jin <kenjin4096@gmail.com>

Sunbelt Computer Software

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gh-141367: Use CALL_LIST_APPEND instruction only for lists, not for list subclasses - #141398

gh-141367: Use CALL_LIST_APPEND instruction only for lists, not for list subclasses#141398
Fidget-Spinner merged 3 commits into
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efimov-mikhail:issue-141367-call-list-append-specialize-fix

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bedevere-bot commented Nov 14, 2025

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

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efimov-mikhail commented Nov 11, 2025 •

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