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[3.13] gh-135836: Fix IndexError in asyncio.create_connection with empty exceptions list (GH-135845) (#136168)

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gh-135836: Fix `IndexError` in `asyncio.create_connection` with empty exceptions list (GH-135845)
(cherry picked from commit 0e19db653d)

Co-authored-by: heliang666s <147408835+heliang666s@users.noreply.github.com>
Co-authored-by: Kumar Aditya <kumaraditya@python.org>
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Miss Islington (bot) 2025-07-03 06:07:28 +02:00 • committed by GitHub
parent 004f464338
commit 1994d2e5b1
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3 changed files with 35 additions and 1 deletions
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5
Lib/asyncio/base_events.py
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@ -1164,7 +1164,7 @@ class BaseEventLoop(events.AbstractEventLoop):
raise ExceptionGroup("create_connection failed", exceptions)
if len(exceptions) == 1:
raise exceptions[0]
else:
elif exceptions:
# If they all have the same str(), raise one.
model = str(exceptions[0])
if all(str(exc) == model for exc in exceptions):
@ -1173,6 +1173,9 @@ class BaseEventLoop(events.AbstractEventLoop):
# the various error messages.
raise OSError('Multiple exceptions: {}'.format(
', '.join(str(exc) for exc in exceptions)))
else:
# No exceptions were collected, raise a timeout error
raise TimeoutError('create_connection failed')
finally:
exceptions = None