🐞 Describe the bug
After upgrading to aiohttp==3.7.1, dns resolution fails with an exception.

💡 To Reproduce

1. I believe this is due to not have IPV6 enabled in my kernel, which is custom compiled with.
   CONFIG_IPV6=n
2. Run:

   import asyncio
   import aiohttp
   
   
   async def main():
       async with aiohttp.ClientSession() as session:
           async with session.get('http://python.org') as response:
               print(response.status)
   
   
   asyncio.run(main())

3. Actual behavior

   $ python bug.py
   Traceback (most recent call last):
     File "bug.py", line 11, in <module>
       asyncio.run(main())
     File "/usr/lib/python3.7/asyncio/runners.py", line 43, in run
       return loop.run_until_complete(main)
     File "/usr/lib/python3.7/asyncio/base_events.py", line 587, in run_until_complete
       return future.result()
     File "bug.py", line 7, in main
       async with session.get('http://python.org') as response:
     File "/home/dbn/usr/py37/lib/python3.7/site-packages/aiohttp/client.py", line 1124, in __aenter__
       self._resp = await self._coro
     File "/home/dbn/usr/py37/lib/python3.7/site-packages/aiohttp/client.py", line 528, in _request
       req, traces=traces, timeout=real_timeout
     File "/home/dbn/usr/py37/lib/python3.7/site-packages/aiohttp/connector.py", line 541, in connect
       proto = await self._create_connection(req, traces, timeout)
     File "/home/dbn/usr/py37/lib/python3.7/site-packages/aiohttp/connector.py", line 898, in _create_connection
       _, proto = await self._create_direct_connection(req, traces, timeout)
     File "/home/dbn/usr/py37/lib/python3.7/site-packages/aiohttp/connector.py", line 1005, in _create_direct_connection
       hosts = await asyncio.shield(host_resolved)
     File "/home/dbn/usr/py37/lib/python3.7/site-packages/aiohttp/connector.py", line 871, in _resolve_host
       addrs = await self._resolver.resolve(host, port, family=self._family)
     File "/home/dbn/usr/py37/lib/python3.7/site-packages/aiohttp/resolver.py", line 37, in resolve
       if family == socket.AF_INET6 and address[3]:  # type: ignore
   IndexError: tuple index out of range

💡 Expected behavior

Should print 200.

📋 Logs/tracebacks

📋 Your version of the Python

$ python --version
Python 3.7.9

📋 Your version of the aiohttp/yarl/multidict distributions

$ python -m pip show aiohttp
Name: aiohttp
Version: 3.7.1
Summary: Async http client/server framework (asyncio)
Home-page: https://github.com/aio-libs/aiohttp
Author: Nikolay Kim
Author-email: [email protected]
License: Apache 2
Location: /home/dbn/usr/py37/lib/python3.7/site-packages
Requires: multidict, async-timeout, typing-extensions, yarl, chardet, attrs
Required-by: replay-proxy

$ python -m pip show multidict
Name: multidict
Version: 4.7.6
Summary: multidict implementation
Home-page: https://github.com/aio-libs/multidict
Author: Andrew Svetlov
Author-email: [email protected]
License: Apache 2
Location: /home/dbn/usr/py37/lib/python3.7/site-packages
Requires:
Required-by: yarl, aiohttp

$ python -m pip show yarl
Name: yarl
Version: 1.5.1
Summary: Yet another URL library
Home-page: https://github.com/aio-libs/yarl/
Author: Andrew Svetlov
Author-email: [email protected]
License: Apache 2
Location: /home/dbn/usr/py37/lib/python3.7/site-packages
Requires: typing-extensions, multidict, idna
Required-by: aiohttp, replay-proxy

📋 Additional context