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

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Merged
merged 1 commit into from
Oct 24, 2024
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gh-125245: Fix race condition when importing collections.abc #125415

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3 changes: 3 additions & 0 deletions Lib/collections/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,9 @@
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
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3 changes: 0 additions & 3 deletions Lib/collections/abc.py
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2024-10-11-00-40-13.gh-issue-125245.8vReM-.rst
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@@ -0,0 +1,2 @@
Fix race condition when importing :mod:`collections.abc`, which could
incorrectly return an empty module.
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