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GeezerVison is showing github.com — [3.13] gh-154275: Do not crash on deeply nested `__parameters__` in `GenericAlias` (GH-154277) by sobolevn · Pull Request #154340 · python/cpython

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@sobolevn

@sobolevn sobolevn commented Jul 21, 2026 •
edited by bedevere-app Bot
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(cherry picked from commit 1034e07)

  • Issue: _Py_make_parameters recurses without a guard: a self-referential/deeply-nested generic-alias arg crashes the interpreter #154275

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@sobolevn
[3.13] pythongh-154275: Do not crash on deeply nested `__parameters__…
6741526 
…` in `GenericAlias` (pythonGH-154277)

(cherry picked from commit 1034e07)

Co-authored-by: sobolevn <[email protected]>
@sobolevn
sobolevn requested review from AlexWaygood and JelleZijlstra as code owners July 21, 2026 09:48
This was referenced Jul 21, 2026
_Py_make_parameters recurses without a guard: a self-referential/deeply-nested generic-alias arg crashes the interpreter #154275
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gh-154275: Do not crash on deeply nested __parameters__ in GenericAlias #154277
Merged
@bedevere-app bedevere-app Bot added the awaiting core review label Jul 21, 2026
@sobolevn sobolevn mentioned this pull request Jul 21, 2026
gh-154275: Fix cleanup code in _Py_make_parameters #154341
Merged
sobolevn added 2 commits July 21, 2026 12:58
@sobolevn
Remove the test for 3.13
3dcd969
@sobolevn
pythongh-154275: Fix cleanup code in _Py_make_parameters
4266cd4
@sobolevn
sobolevn enabled auto-merge (squash) July 21, 2026 10:05
@sobolevn
sobolevn merged commit 0942455 into python:3.13 Jul 21, 2026
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@bedevere-app bedevere-app Bot removed the awaiting core review label Jul 21, 2026
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@JelleZijlstra JelleZijlstra Awaiting requested review from JelleZijlstra
@AlexWaygood AlexWaygood Awaiting requested review from AlexWaygood

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@sobolevn
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