Debug blocking handlers

Is it possible to debug blocking handlers in aiohttp server?

For example, I have a server:

import asyncio
import warnings
from time import sleep
from aiohttp import web

warnings.simplefilter('always', ResourceWarning)

async def hello(request):
    return web.Response(text="Hello, world")

loop = asyncio.get_event_loop()

app = web.Application()
app.add_routes([web.get('/', hello)])

In console I received

(.env) ➜  aiohttp-blocking-issue python 
======== Running on ========
(Press CTRL+C to quit)
Executing <Task finished coro=<Application._handle() done, defined at /home/y.hyzyla/Work/aiohttp-blocking-issue/.env/lib/python3.6/site-packages/aiohttp/> result=<Response OK not prepared> created at /home/y.hyzyla/Work/aiohttp-blocking-issue/.env/lib/python3.6/site-packages/aiohttp/> took 1.001 seconds [09/Dec/2019:10:58:58 +0000] "GET / HTTP/1.1" 200 163 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:70.0) Gecko/20100101 Firefox/70.0"

Where first line is trully useless, such as don’t tell any information what handler contains blocked code

Agree, not very useful.
Do you have an idea how to improve it?