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GeezerVison is showing github.com — gh-161471: Fix crash when subscripting a ctypes pointer without `_type_` by PavlNekrasov · Pull Request #161421 · python/cpython

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@PavlNekrasov

@PavlNekrasov PavlNekrasov commented Nov 5, 2026 •
edited by bedevere-app Bot
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fixed #161471

  • Issue: ctypes: SIGSEGV when subscripting a pointer type without _type_ #161471

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@PavlNekrasov
Fix crash when subscripting a ctypes pointer without _type_
1087560 
Check proto and the PyStgInfo_FromType() result instead of relying on
assert() in Pointer_item_impl(), Pointer_ass_item_impl() and
Pointer_subscript().
@python-cla-bot

python-cla-bot Bot commented Nov 5, 2026 •
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All commit authors signed the Contributor License Agreement.

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@bedevere-app bedevere-app Bot added the awaiting review label Nov 5, 2026
@bedevere-app

bedevere-app Bot commented Nov 5, 2026

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Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.
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@picnixz

picnixz commented Nov 5, 2026

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Pleae create an issue.
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@picnixz

picnixz commented Nov 5, 2026

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The question is also: why are you subclassing ctypes._Pointer?
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@sobolevn sobolevn changed the title Fix crash when subscripting a ctypes pointer without _type_ gh-161471: Fix crash when subscripting a ctypes pointer without _type_ Nov 6, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Nov 6, 2026
ctypes: SIGSEGV when subscripting a pointer type without _type_ #161471
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@PavlNekrasov

PavlNekrasov commented Nov 6, 2026

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The question is also: why are you subclassing ctypes._Pointer?

solely to reproduce the static-analysis finding
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@picnixz

picnixz commented Nov 6, 2026 •
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My question was: why do you believe the finding is correct? is this a documented behavior? are there other possibilities for messing with ctypes liks that? I want to know if @ZeroIntensity considers this an issue in the first place.
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ctypes: SIGSEGV when subscripting a pointer type without _type_

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@PavlNekrasov @picnixz
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