➜

This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

classification
Title: `list(FunctionType(a.gi_code, {})(0))` crashes Python
Type: crash Stage:
Components: Interpreter Core Versions: Python 3.11, Python 3.10, Python 3.9
process
Status: open Resolution:
Dependencies: Superseder:
Assigned To: Nosy List: sobolevn, xtreak
Priority: normal Keywords:

Created on 2022-02-09 11:31 by sobolevn, last changed 2022-04-11 14:59 by admin.

Messages (2)
msg412897 - (view) Author: Nikita Sobolev (sobolevn) * (Python triager) Date: 2022-02-09 11:31 
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.
msg412926 - (view) Author: Karthikeyan Singaravelan (xtreak) * (Python committer) Date: 2022-02-09 17:16 
See also https://bugs.python.org/issue36956
History
Date User Action Args
2022-04-11 14:59:55adminsetgithub: 90847
2022-02-09 17:16:46xtreaksetnosy: + xtreak
messages: + msg412926
2022-02-09 11:31:51sobolevncreate