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Passes through asyncio.CancelledError in tornado.gen.coroutine #3539

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Passes through asyncio.CancelledError in tornado.gen.coroutine #3539

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AshwinDeshpandeBG Aug 28, 2025
e2e836a
catch CancelledError in Generator section
AshwinDeshpandeBG Sep 2, 2025
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4 changes: 2 additions & 2 deletions tornado/gen.py
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Original file line number Diff line number Diff line change
Expand Up @@ -221,7 +221,7 @@ def wrapper(*args, **kwargs):
result = ctx_run(func, *args, **kwargs)
except (Return, StopIteration) as e:
result = _value_from_stopiteration(e)
except Exception:
except (Exception, asyncio.CancelledError):
future_set_exc_info(future, sys.exc_info())
try:
return future
Expand All @@ -241,7 +241,7 @@ def wrapper(*args, **kwargs):
future_set_result_unless_cancelled(
future, _value_from_stopiteration(e)
)
except Exception:
except (Exception, asyncio.CancelledError):
future_set_exc_info(future, sys.exc_info())
else:
# Provide strong references to Runner objects as long
Expand Down