local variable 'response_status' referenced before assignment

[Gr1N]

GeneratorExit: null
  File "aiodogstatsd/contrib/aiohttp.py", line 65, in middleware
    response = await handler(request)

UnboundLocalError: local variable 'response_status' referenced before assignment
  File "aiohttp/web_app.py", line 458, in _handle
    resp = await handler(request)
  File "aiohttp/web_middlewares.py", line 119, in impl
    return await handler(request)
  File "aiodogstatsd/contrib/aiohttp.py", line 75, in middleware
    request, response_status, collect_not_allowed, collect_not_found

Need to handle BaseException too.