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gh-114177: avoid calling connection lost callbacks when loop is already closed in asyncio subprocess by kumaraditya303 · Pull Request #134508 · python/cpython · GitHub

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gh-114177: avoid calling connection lost callbacks when loop is already closed in asyncio subprocess #134508

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Merged
kumaraditya303 merged 3 commits into from
May 23, 2025
+7 −1
Conversation 6 Commits 3 Checks 0 Files changed 2
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gh-114177: avoid calling connection lost callbacks when loop is already closed in asyncio subprocess #134508

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7700a54
avoid calling connection lost callbacks when loop is closed
kumaraditya303 May 22, 2025
6f52c06
📜🤖 Added by blurb_it.
blurb-it[bot] May 22, 2025
60cef45
Update Lib/asyncio/base_subprocess.py
kumaraditya303 May 23, 2025
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7 changes: 6 additions & 1 deletion Lib/asyncio/base_subprocess.py
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Original file line number Diff line number Diff line change
Expand Up @@ -104,7 +104,12 @@ def close(self):
for proto in self._pipes.values():
if proto is None:
continue
proto.pipe.close()
# See gh-114177
# skip closing the pipe if loop is already closed
# this can happen e.g. when loop is closed immediately after
# process is killed
if self._loop and not self._loop.is_closed():
proto.pipe.close()

if (self._proc is not None and
# has the child process finished?
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2025-05-22-13-10-32.gh-issue-114177.3TYUJ3.rst
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@@ -0,0 +1 @@
Fix :mod:`asyncio` to not close subprocess pipes which would otherwise error out when the event loop is already closed.
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