phyng

Error when work with `__call__` request handler

1

## env - Python 3.7 - aiohttp==3.3.2 - aiohttp-wsgi==0.8.1 - aiohttp-debugtoolbar==0.5.0 ## exception ``` [2018-08-14 15:15:47 +0800] [55447] [ERROR] Error handling request Traceback (most recent call last): File "/Users/phyng/.virtualenvs/dcode3.7/lib/python3.7/site-packages/aiohttp/web_protocol.py", line...