BrokenPipeError in tulip/http/protocol.py

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What steps will reproduce the problem?

$ python runtests.py
...
Fatal error for <tulip.selector_events._SelectorSocketTransport object at 
0x7f7f2406b350>
Traceback (most recent call last):
  File "/home/andrew/projects/tulip/tulip/http/server.py", line 91, in start
    info = yield from self.stream.read_request_line()
  File "/home/andrew/projects/tulip/tulip/http/protocol.py", line 95, in read_request_line
    raise errors.BadStatusLine(line) from None
tulip.http.errors.BadStatusLine: ''

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/andrew/projects/tulip/tulip/selector_events.py", line 372, in write
    n = self._sock.send(data)
BrokenPipeError: [Errno 32] Broken pipe
...

I can reproduce it on my Ubuntu linux box sometimes.
Not every run but often enough.

Should we process BrokenPipeError as well as other disconnection errors for 
this case?

Original issue reported on code.google.com by andrew.s...@gmail.com on 15 Apr 2013 at 5:36