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H2 StreamClosed error while requesting duckduckgo.com

See original GitHub issue

Running the following script on the current master:

import asyncio
import httpx

async def main():
    cl = httpx.AsyncClient()
    resp = await cl.get("https://duckduckgo.com")
    print(resp)

if __name__ == "__main__":
    asyncio.run(main())

Errors with the following traceback:

Traceback (most recent call last):
  File ".dev/middlewares.py", line 14, in <module>
    asyncio.run(main())
  File "/Users/yeray/.pyenv/versions/3.7.3/lib/python3.7/asyncio/runners.py", line 43, in run
    return loop.run_until_complete(main)
  File "/Users/yeray/.pyenv/versions/3.7.3/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete
    return future.result()
  File ".dev/middlewares.py", line 8, in main
    resp = await cl.get("https://duckduckgo.com")
  File "/Users/yeray/code/personal/_forks/httpx/httpx/client.py", line 327, in get
    timeout=timeout,
  File "/Users/yeray/code/personal/_forks/httpx/httpx/client.py", line 560, in request
    timeout=timeout,
  File "/Users/yeray/code/personal/_forks/httpx/httpx/client.py", line 155, in send
    allow_redirects=allow_redirects,
  File "/Users/yeray/code/personal/_forks/httpx/httpx/client.py", line 188, in send_handling_redirects
    request, verify=verify, cert=cert, timeout=timeout
  File "/Users/yeray/code/personal/_forks/httpx/httpx/dispatch/connection_pool.py", line 116, in send
    raise exc
  File "/Users/yeray/code/personal/_forks/httpx/httpx/dispatch/connection_pool.py", line 111, in send
    request, verify=verify, cert=cert, timeout=timeout
  File "/Users/yeray/code/personal/_forks/httpx/httpx/dispatch/connection.py", line 51, in send
    response = await self.h2_connection.send(request, timeout=timeout)
  File "/Users/yeray/code/personal/_forks/httpx/httpx/dispatch/http2.py", line 48, in send
    status_code, headers = await self.receive_response(stream_id, timeout)
  File "/Users/yeray/code/personal/_forks/httpx/httpx/dispatch/http2.py", line 122, in receive_response
    event = await self.receive_event(stream_id, timeout)
  File "/Users/yeray/code/personal/_forks/httpx/httpx/dispatch/http2.py", line 155, in receive_event
    events = self.h2_state.receive_data(data)
  File "/Users/yeray/.pyenv/versions/httpx/lib/python3.7/site-packages/h2/connection.py", line 1463, in receive_data
    events.extend(self._receive_frame(frame))
  File "/Users/yeray/.pyenv/versions/httpx/lib/python3.7/site-packages/h2/connection.py", line 1486, in _receive_frame
    frames, events = self._frame_dispatch_table[frame.__class__](frame)
  File "/Users/yeray/.pyenv/versions/httpx/lib/python3.7/site-packages/h2/connection.py", line 1702, in _receive_window_update_frame
    frame.window_increment
  File "/Users/yeray/.pyenv/versions/httpx/lib/python3.7/site-packages/h2/stream.py", line 1126, in receive_window_update
    StreamInputs.RECV_WINDOW_UPDATE
  File "/Users/yeray/.pyenv/versions/httpx/lib/python3.7/site-packages/h2/stream.py", line 129, in process_input
    return func(self, previous_state)
  File "/Users/yeray/.pyenv/versions/httpx/lib/python3.7/site-packages/h2/stream.py", line 397, in window_on_closed_stream
    return self.recv_on_closed_stream(previous_state)
  File "/Users/yeray/.pyenv/versions/httpx/lib/python3.7/site-packages/h2/stream.py", line 336, in recv_on_closed_stream
    raise StreamClosedError(self.stream_id)
h2.exceptions.StreamClosedError: 1

Anyone else getting this error?