Asyncio raise ConnectionResetError without the message set.

[sileht]

Bug report

Asyncio may raise ConnectionResetError without instanciante it.

ConnectionResetError: null
  File "redis/asyncio/connection.py", line 700, in connect
    await self._connect()
  File "redis/asyncio/connection.py", line 735, in _connect
    reader, writer = await asyncio.open_connection(
  File "asyncio/streams.py", line 47, in open_connection
    transport, _ = await loop.create_connection(
  File "asyncio/base_events.py", line 1089, in create_connection
    transport, protocol = await self._create_connection_transport(
  File "asyncio/base_events.py", line 1119, in _create_connection_transport
    await waiter

Libraries (like redis-py) expected all OSError to be instantiated with .args set.

Your environment

python 3.10.4
Ubuntu 20.04

Linked PRs

• gh-94061: set a message to ConnectionResetError #94062

[sileht]

Related to redis/redis-py#2237

[kumaraditya303]

Can you provide a minimal reproducer for this? The issue you linked is closed now.

[sileht]

The redispy library has implemented a workaround, that why the downstream issue is closed.

Not sure this need a reproducer, this is not a logic issue, but an exception that missed to be instantiated.

To raise this exception, you need to break a tcp connection at a certain timing.

[kumaraditya303]

PR welcome!

[sileht]

The PR is waiting since 2 month for review here: #94062 and the CI failure is unrelated to the change.