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GeezerVison is showing github.com — [3.15] gh-155109: Run tests exhausting the C stack with a limited C stack (GH-155120) by miss-islington · Pull Request #155164 · python/cpython

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@miss-islington

@miss-islington miss-islington commented Aug 4, 2026 •
edited by bedevere-app Bot
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Add the @support.run_with_limited_c_stack() decorator which runs the test
in a thread with a 8 MiB C stack, so that the outcome does not depend on
RLIMIT_STACK. Use it in tests which recurse to a fixed depth --
@support.skip_if_huge_c_stack() failed to skip them with a 16 MiB stack.
(cherry picked from commit ce5ae29)

Co-authored-by: Serhiy Storchaka [email protected]
Co-Authored-By: Claude Opus 5 (1M context) [email protected]

  • Issue: skip_if_huge_c_stack underestimates available C recursion depth #155109

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@serhiy-storchaka @claude @miss-islington
pythongh-155109: Run tests exhausting the C stack with a limited C st…
187d1c3 
…ack (pythonGH-155120)

Add the @support.run_with_limited_c_stack() decorator which runs the test
in a thread with a 8 MiB C stack, so that the outcome does not depend on
RLIMIT_STACK. Use it in tests which recurse to a fixed depth --
@support.skip_if_huge_c_stack() failed to skip them with a 16 MiB stack.
(cherry picked from commit ce5ae29)

Co-authored-by: Serhiy Storchaka <[email protected]>
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
@miss-islington
miss-islington requested review from AlexWaygood, Eclips4, JelleZijlstra, iritkatriel and tomasr8 as code owners August 4, 2026 09:44
This was referenced Aug 4, 2026
skip_if_huge_c_stack underestimates available C recursion depth #155109
Closed
gh-155109: Run tests exhausting the C stack with a limited C stack #155120
Merged
@bedevere-app bedevere-app Bot added the awaiting review label Aug 4, 2026
@JelleZijlstra
JelleZijlstra removed their request for review August 15, 2026 01:44
@ZeroIntensity ZeroIntensity mentioned this pull request Oct 2, 2026
[3.15] gh-156204: Guard recursion in PyErr_GivenExceptionMatches (GH-156205) #158622
Merged
@serhiy-storchaka
serhiy-storchaka merged commit 1f660c7 into python:3.15 Oct 10, 2026
96 of 100 checks passed

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@bedevere-app bedevere-app Bot removed the awaiting review label Oct 10, 2026
@miss-islington
miss-islington deleted the backport-ce5ae29-3.15 branch October 10, 2026 09:25
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@AlexWaygood AlexWaygood Awaiting requested review from AlexWaygood AlexWaygood is a code owner
@iritkatriel iritkatriel Awaiting requested review from iritkatriel iritkatriel is a code owner
@Eclips4 Eclips4 Awaiting requested review from Eclips4 Eclips4 is a code owner
@tomasr8 tomasr8 Awaiting requested review from tomasr8 tomasr8 is a code owner

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2 participants

@miss-islington @serhiy-storchaka
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