Getting h2.exceptions.ProtocolError when using httpx with http2

[tabrezm]

I believe I've hit another case related to this existing issue: #679.

Here is my stack:

File "/glue/lib/installation/providers/cj.py", line 369, in process_shopping_product_feed
    for i, chunk in enumerate(r.iter_bytes()):
  File "/glue/lib/installation/httpx/_models.py", line 829, in iter_bytes
    for raw_bytes in self.iter_raw():
File "/glue/lib/installation/httpx/_models.py", line 883, in iter_raw
    for raw_stream_bytes in self.stream:
  File "/glue/lib/installation/httpx/_client.py", line 126, in __iter__
    for chunk in self._stream:
  File "/glue/lib/installation/httpx/_transports/default.py", line 113, in __iter__
    for part in self._httpcore_stream:
  File "/glue/lib/installation/httpcore/_sync/connection_pool.py", line 367, in __iter__
    raise exc from None
  File "/glue/lib/installation/httpcore/_sync/connection_pool.py", line 363, in __iter__
    for part in self._stream:
  File "/glue/lib/installation/httpcore/_sync/http2.py", line 582, in __iter__
    raise exc
  File "/glue/lib/installation/httpcore/_sync/http2.py", line 572, in __iter__
    for chunk in self._connection._receive_response_body(
  File "/glue/lib/installation/httpcore/_sync/http2.py", line 313, in _receive_response_body
    event = self._receive_stream_event(request, stream_id)
File "/glue/lib/installation/httpcore/_sync/http2.py", line 333, in _receive_stream_event
    self._receive_events(request, stream_id)
  File "/glue/lib/installation/httpcore/_sync/http2.py", line 361, in _receive_events
    events = self._read_incoming_data(request)
  File "/glue/lib/installation/httpcore/_sync/http2.py", line 454, in _read_incoming_data
    events: typing.List[h2.events.Event] = self._h2_state.receive_data(data)
File "/glue/lib/installation/h2/connection.py", line 1463, in receive_data
    events.extend(self._receive_frame(frame))
  File "/glue/lib/installation/h2/connection.py", line 1487, in _receive_frame
    frames, events = self._frame_dispatch_table[frame.__class__](frame)
  File "/glue/lib/installation/h2/connection.py", line 1673, in _receive_data_frame
    events = self.state_machine.process_input(
  File "/glue/lib/installation/h2/connection.py", line 228, in process_input
    raise ProtocolError(
h2.exceptions.ProtocolError: Invalid input ConnectionInputs.RECV_DATA in state ConnectionState.CLOSED

My current workaround is to add this exception to tenacity.retry(), but ideally this exception is properly wrapped in httpcore.

Thanks!

[tabrezm]

Note that this occurs when the timeout is set to None. Based on my testing, if I add any reasonable timeout, I'm unable to repro this issue on my setup.