streaming logs raises HTTP exception with error in chunk decoding

The server is docker-1.13.1.

Packages:

$ pip3 freeze | egrep (requests|urllib)
requests==2.13.0
urllib3==1.20

The code is quite simple:

for l in d.logs(c, follow=True, stream=True):
 print(l)

Traceback (most recent call last):                                                                                                            [667/2266]
  File "/usr/lib/python3.6/site-packages/requests/packages/urllib3/response.py", line 535, in _update_chunk_length
    self.chunk_left = int(line, 16)
ValueError: invalid literal for int() with base 16: b''

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/requests/packages/urllib3/response.py", line 298, in _error_catcher
    yield
  File "/usr/lib/python3.6/site-packages/requests/packages/urllib3/response.py", line 590, in read_chunked
    self._update_chunk_length()
  File "/usr/lib/python3.6/site-packages/requests/packages/urllib3/response.py", line 539, in _update_chunk_length
    raise httplib.IncompleteRead(line)
http.client.IncompleteRead: IncompleteRead(0 bytes read)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/requests/models.py", line 719, in generate
    for chunk in self.raw.stream(chunk_size, decode_content=True):
  File "/usr/lib/python3.6/site-packages/requests/packages/urllib3/response.py", line 428, in stream
    for line in self.read_chunked(amt, decode_content=decode_content):
  File "/usr/lib/python3.6/site-packages/requests/packages/urllib3/response.py", line 618, in read_chunked
    self._original_response.close()
  File "/usr/lib64/python3.6/contextlib.py", line 100, in __exit__
    self.gen.throw(type, value, traceback)
  File "/usr/lib/python3.6/site-packages/requests/packages/urllib3/response.py", line 316, in _error_catcher
    raise ProtocolError('Connection broken: %r' % e, e)
requests.packages.urllib3.exceptions.ProtocolError: ('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/tt/.dotfiles/bin/test-build", line 68, in <module>
    for l in d.logs(c, follow=True, stream=True):
  File "/usr/lib/python3.6/site-packages/docker/client.py", line 317, in _stream_raw_result
    for out in response.iter_content(chunk_size=1, decode_unicode=True):
  File "/usr/lib/python3.6/site-packages/requests/utils.py", line 389, in stream_decode_response_unicode
    for chunk in iterator:
  File "/usr/lib/python3.6/site-packages/requests/models.py", line 722, in generate
    raise ChunkedEncodingError(e)
requests.exceptions.ChunkedEncodingError: ('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))

Start by reproducing the d.logs(c, follow=True, stream=True) example against Docker 1.13.1 and trace the streaming path through docker/client.py near _stream_raw_result. Compare the response handling with the reported ChunkedEncodingError; done means the failure is understood and the streaming behavior is covered by an appropriate regression test.