mirrors/cpython
0
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2024-11-26 19:34:19 +08:00
Code Issues Packages Projects Releases Wiki Activity

gh-125245: Fix race condition when importing collections.abc (#125415)

Browse Source 
If multiple threads concurrently imported `collections.abc`, some of the
threads might incorrectly see the "shim" `Lib/collections/abc.py` module
instead of the correct `Lib/_collections_abc.py` module.  This affected
both the free threading build and the default GIL-enabled build.
This commit is contained in:
Sam Gross 2024-10-24 18:12:51 -04:00 committed by GitHub
parent 332356b880
commit fed501d724
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
3 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Lib/collections/__init__.py
View File

@ -29,6 +29,9 @@ __all__ = [
import _collections_abc
import sys as _sys
_sys.modules['collections.abc'] = _collections_abc
abc = _collections_abc
from itertools import chain as _chain
from itertools import repeat as _repeat
from itertools import starmap as _starmap

3
Lib/collections/abc.py
View File

@ -1,3 +0,0 @@
import _collections_abc
import sys
sys.modules[__name__] = _collections_abc

2
Misc/NEWS.d/next/Library/2024-10-11-00-40-13.gh-issue-125245.8vReM-.rst Normal file
View File

@ -0,0 +1,2 @@
Fix race condition when importing :mod:`collections.abc`, which could
incorrectly return an empty module.