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invalid length of startup packet #313

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@francoricci

Description

@francoricci
  • asyncpg version: 0.16.0
  • PostgreSQL version: 9.6.8
  • **Do you use a PostgreSQL SaaS? NO
  • Python version: 3.6.5
  • Platform: FreeBSD 11.2
  • Do you use pgbouncer?: NO
  • Did you install asyncpg with pip?: YES
  • If you built asyncpg locally, which version of Cython did you use?:
  • Can the issue be reproduced under both asyncio and
    uvloop?
    : YES

The following script :

import asyncio
import asyncpg
import uvloop

async def run():
conn = await asyncpg.connect(host='127.0.0.1', port='5432', user='root', password='pippo', database='postgres', ssl=None)
values = await conn.fetch("SELECT * FROM pg_type")
await conn.close()
asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
loop = asyncio.get_event_loop()
loop.run_until_complete(run())

returns:

asyncpg.exceptions.ConnectionDoesNotExistError: connection was closed in the middle of operation
and postgresql:
LOG: invalid length of startup packet

With previous asyncpg version 0.13.0 all works well

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