8000 `list(FunctionType(a.gi_code, {})(0))` crashes Python · Issue #90847 · python/cpython · GitHub
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sobolevn opened this issue Feb 9, 2022 · 3 comments
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list(FunctionType(a.gi_code, {})(0)) crashes Python #90847

sobolevn opened this issue Feb 9, 2022 · 3 comments
Labels
3.9 only security fixes 3.10 only security fixes 3.11 only security fixes interpreter-core (Objects, Python, Grammar, and Parser dirs) type-crash A hard crash of the interpreter, possibly with a core dump

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@sobolevn
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sobolevn commented Feb 9, 2022
BPO 46689
Nosy @tirkarthi, @sobolevn

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-02-09.11:31:51.245>
labels = ['interpreter-core', '3.10', '3.9', 'type-crash', '3.11']
title = '`list(FunctionType(a.gi_code, {})(0))` crashes Python'
updated_at = <Date 2022-02-09.17:16:46.319>
user = 'https://github.com/sobolevn'

bugs.python.org fields:

activity = <Date 2022-02-09.17:16:46.319>
actor = 'xtreak'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2022-02-09.11:31:51.245>
creator = 'sobolevn'
dependencies = []
files = []
hgrepos = []
issue_num = 46689
keywords = []
message_count = 2.0
messages = ['412897', '412926']
nosy_count = 2.0
nosy_names = ['xtreak', 'sobolevn']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue46689'
versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']
@sobolevn
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sobolevn commented Feb 9, 2022

Here's the simplest reproduction:

from types import FunctionType
a = (x for x in [1])
list(FunctionType(a.gi_code, {})(0))

I understand that the code above does not make much sense, but I still think it should not crash.

Demo:

» PYTHONFAULTHANDLER=1 ./python.exe
Python 3.11.0a5+ (heads/issue-46647-dirty:88819357a5, Feb  5 2022, 18:19:59) [Clang 11.0.0 (clang-1100.0.33.16)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from types import FunctionType
>>> a = (x for x in [1])
>>> list(FunctionType(a.gi_code, {})(0))
Fatal Python error: Segmentation fault

Current thread 0x0000000112ece5c0 (most recent call first):
  File "<stdin>", line 1 in <genexpr>
  File "<stdin>", line 1 in <module>
[1]    22662 segmentation fault  PYTHONFAULTHANDLER=1 ./python.exe

I can reproduce this on 3.9 and 3.10 as well.

@sobolevn sobolevn added 3.9 only security fixes 3.10 only security fixes 3.11 only security fixes interpreter-core (Objects, Python, Grammar, and Parser dirs) type-crash A hard crash of the interpreter, possibly with a core dump labels Feb 9, 2022
@tirkarthi
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See also https://bugs.python.org/issue36956

@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
@kumaraditya303
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Duplicate of #81137

@kumaraditya303 kumaraditya303 marked this as a duplicate of #81137 May 11, 2022
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