Another buildbot failure which may be related:

http://buildbot.python.org/all/builders/AMD64%20FreeBSD%209.x%203.6/builds/154/steps/test/logs/stdio

test_write (test.test_socketserver.SocketWriterTest) ... Exception in thread <class 'socketserver.TCPServer'> serving:
Traceback (most recent call last):
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/threading.py", line 916, in _bootstrap_inner
    self.run()
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/threading.py", line 864, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/socketserver.py", line 238, in serve_forever
    self._handle_request_noblock()
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/socketserver.py", line 319, in _handle_request_noblock
    self.handle_error(request, client_address)
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/socketserver.py", line 317, in _handle_request_noblock
    self.process_request(request, client_address)
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/socketserver.py", line 349, in process_request
    self.shutdown_request(request)
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/socketserver.py", line 510, in shutdown_request
    self.close_request(request)
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/socketserver.py", line 514, in close_request
    request.close()
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/socket.py", line 417, in close
    self._real_close()
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/socket.py", line 411, in _real_close
    _ss.close(self)
ConnectionResetError: [Errno 54] Connection reset by peer

/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/unittest/case.py:633: ResourceWarning: unclosed <socket.socket fd=5, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 29862), raddr=('127.0.0.1', 29860)>
  outcome.errors.clear()
/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/unittest/case.py:633: ResourceWarning: unclosed <socket.socket fd=4, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 29860)>
  outcome.errors.clear()
test test_socketserver failed
ok

======================================================================
ERROR: test_TCPServer (test.test_socketserver.SocketServerTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/test/test_socketserver.py", line 175, in test_TCPServer
    self.stream_examine)
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/test/support/__init__.py", line 2045, in decorator
    return func(*args)
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/test/test_socketserver.py", line 141, in run_server
    testfunc(svrcls.address_family, addr)
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/test/test_socketserver.py", line 153, in stream_examine
    buf = data = receive(s, 100)
  File "/usr/home/buildbot/python/3.6.koobs-freebsd9/build/Lib/test/test_socketserver.py", line 46, in receive
    raise RuntimeError("timed out on %r" % (sock,))
RuntimeError: timed out on <socket.socket fd=5, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('127.0.0.1', 29862), raddr=('127.0.0.1', 29860)>