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GeezerVison is showing github.com — gh-156910: fix deadlock in type_set_abstractmethods under free-threading by kumaraditya303 · Pull Request #156948 · python/cpython

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@kumaraditya303

@kumaraditya303 kumaraditya303 commented Sep 4, 2026 •
edited by bedevere-app Bot
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  • Issue: Deadlock in 3.15.0rc2 free threading in type_set_abstractmethods #156910

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@kumaraditya303
fix deadlock in type_set_abstractmethods
31e364a
@kumaraditya303
kumaraditya303 requested a review from markshannon as a code owner September 4, 2026 16:19
@bedevere-app bedevere-app Bot mentioned this pull request Sep 4, 2026
Deadlock in 3.15.0rc2 free threading in type_set_abstractmethods #156910
Closed
@bedevere-app bedevere-app Bot added the awaiting core review label Sep 4, 2026
@kumaraditya303
add news
eda5e81
@kumaraditya303 kumaraditya303 added topic-free-threading needs backport to 3.14 bugs and security fixes needs backport to 3.15 bugs and security fixes labels Sep 4, 2026
@kumaraditya303
kumaraditya303 requested review from mpage and nascheme September 4, 2026 16:23
mpage
mpage approved these changes Sep 8, 2026
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LGTM

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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting core review labels Sep 8, 2026
@kumaraditya303
kumaraditya303 merged commit 1ac3bfa into python:main Sep 9, 2026
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@bedevere-app bedevere-app Bot removed the awaiting merge label Sep 9, 2026
@miss-islington-app

miss-islington-app Bot commented Sep 9, 2026

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Thanks @kumaraditya303 for the PR 🌮🎉.. I'm working now to backport this PR to: 3.14, 3.15.
🐍🍒⛏🤖

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@kumaraditya303
kumaraditya303 deleted the gh-156910-abstractmethods-stw-deadlock branch September 9, 2026 06:21
@miss-islington-app

miss-islington-app Bot commented Sep 9, 2026

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Sorry, @kumaraditya303, I could not cleanly backport this to 3.15 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker 1ac3bfaacc424775438f5873fa178a93a53edef2 3.15
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@miss-islington-app miss-islington-app Bot assigned kumaraditya303 Sep 9, 2026
@miss-islington-app

miss-islington-app Bot commented Sep 9, 2026

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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 1ac3bfaacc424775438f5873fa178a93a53edef2 3.14
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@bedevere-app

bedevere-app Bot commented Sep 9, 2026

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GH-157203 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 9, 2026
@kumaraditya303 kumaraditya303 removed the needs backport to 3.14 bugs and security fixes label Sep 9, 2026
maurycy added a commit to maurycy/cpython that referenced this pull request Sep 10, 2026
@maurycy
Merge branch 'main' into tachyon-native-callable
e028ff5
* main: (158 commits)
  pythongh-156924: Try reifying lazy imports in `ForwarRef.evaluate()` (python#156940)
  pythongh-156233: Fix typos and code snippet errors in the docs (python#156475)
  pythongh-156837: Refer to yield expressions in generator function definitions (pythonGH-156863)
  pythongh-155292: Skip updating unicodedata with mismatched interpreter (pythonGH-157066)
  pythongh-157170: Document the scope of global curses settings (pythonGH-157207)
  pythongh-155966: Correct handling of `math.tanpi` poles (python#155980)
  pythongh-157170: Restore use_env() after test_use_prescr_screen in test_curses (pythonGH-157171)
  pythongh-156910: fix deadlock in type_set_abstractmethods under free-threading (python#156948)
  pythongh-155648: Write the empty and placeholder IDLE tests (python#156260)
  pythongh-153569: centralize formatted-string state and source spans (python#156484)
  pythongh-157137: Mark the PEP 820 soft deprecations as 3.15, not `next` (python#157138)
  pythongh-152433: Use regular LoadLibrary in UWP for Windows system libs (pythonGH-156972)
  pythongh-121617: Fix Py_CLEAR() memcpy in C++: replace NULL with _Py_NULL (python#157188)
  pythongh-157135: Fix documentation errors in the `math.atan{2}pi` functions (python#157136)
  pythongh-121617: Fix Py_CLEAR() in C++: replace NULL with _Py_NULL (python#157067)
  pythongh-156774: Speed up pdb startup with asyncio guard (python#156775)
  pythongh-156109: Allow static, non-framework iOS builds (python#156110)
  pythongh-156780: Emscripten: add missing EM_JS_DEPS (python#156798)
  pythongh-152936: Make privileged functions available on Android (python#152977)
  pythongh-123018: Keep the libedit history file header when truncating (pythonGH-157165)
  ...
hugovk pushed a commit that referenced this pull request Sep 11, 2026
@kumaraditya303
[3.15] gh-156910: fix deadlock in type_set_abstractmethods under free…
090b5cd
…-threading (#156948) (#157203)

gh-156910: fix deadlock in type_set_abstractmethods under free-threading (#156948)

(cherry picked from commit 1ac3bfa)
clin1234 pushed a commit to clin1234/cpython that referenced this pull request Sep 12, 2026
@kumaraditya303 @clin1234
pythongh-156910: fix deadlock in type_set_abstractmethods under free-…
c390fd0
…threading (python#156948)
johnslavik pushed a commit to johnslavik/cpython that referenced this pull request Sep 14, 2026
@kumaraditya303 @johnslavik
pythongh-156910: fix deadlock in type_set_abstractmethods under free-…
8982446
…threading (python#156948)
@scasella scasella mentioned this pull request Sep 25, 2026
Free-threading: PyType_Freeze() can deadlock with concurrent class updates #158194
Closed
@davidwelling2 davidwelling2 mentioned this pull request Nov 2, 2026
gh-156910: Add free-threading regression test for type_set_abstractmethods() deadlock #161195
Open
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@mpage mpage mpage approved these changes
@markshannon markshannon Awaiting requested review from markshannon markshannon is a code owner
@nascheme nascheme Awaiting requested review from nascheme

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@kumaraditya303 @mpage
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