aiohttp wsgi PATH_INFO parse Error.

test.py

#!/usr/bin/env python
# encoding: utf-8

import asyncio
from http.client import responses
from aiohttp.wsgi import WSGIServerHttpProtocol

@asyncio.coroutine
def foo(env, start_res):
    start_res(
        "{} {}".format(200, responses.get(200)),
        {}.items()
    )
    return [env.get('PATH_INFO').encode()]

loop = asyncio.get_event_loop()

loop.run_until_complete(
    loop.create_server(
        lambda: WSGIServerHttpProtocol(foo),
        "127.0.0.1",
        8000
    )
)

loop.run_forever()

In [65]: get('http://127.0.0.1:8000//a').text
Out[65]: ''

In [66]: get('http://127.0.0.1:8000///a').text
Out[66]: '/a'

It is not reasonable.