asyncpg.exceptions._base.InterfaceError: cannot call Connection.fetch(): connection has been released back to the pool

• asyncpg version: 0.26.0
• PostgreSQL version: 12.0
• Do you use a PostgreSQL SaaS? If so, which? Can you reproduce : NO, from pg docker
  the issue with a local PostgreSQL install?: YES,
• Python version: Python 3.9.13
• Platform: MAC
• Do you use pgbouncer?: No
• Did you install asyncpg with pip?: From tortoise-orm
• If you built asyncpg locally, which version of Cython did you use?: No
• Can the issue be reproduced under both asyncio and
  uvloop?: YES

I am using Sanic + tortoise-orm,

the test code as below:

when runs a query during the Request handler, it runs successfully

while runs in a background task, it report this error:

asyncpg.exceptions._base.InterfaceError: cannot call Connection.fetch(): connection has been released back to the pool

I found when the first time query, through the pool.acquire, got the right <PoolConnectionProxy <asyncpg.connection.Connection object at 0x7fd42102f9e0> 0x7fd3d018e550>

but when go to the background task query , the pool.acquire, got an "released" <PoolConnectionProxy [released] 0x7fd3d018e550>

I am confused how can I got an released PoolConnectionProxy from the same code

[query in the get Request method]

[query in the background task]

[the pool connection acquire method]

[the pool connection release method]

先从 issue 中 Sanic 和 tortoise-orm 关于请求处理器与后台任务的示例开始，然后跟踪截图中显示的 pool.acquire 和 pool release 路径。尽可能复现已释放的 PoolConnectionProxy 错误，并确定后台查询是否在释放后使用了连接；完成的标准是记录原因，以及项目侧修复或已确认的使用问题。