obsd-laptop:~/tests/japronto$ python3.6 hello.py                                         
Accepting connections on http://0.0.0.0:8080
Exception in callback UVTransport._call_connection_made
handle: <Handle UVTransport._call_connection_made>
Traceback (most recent call last):
  File "uvloop/cbhandles.pyx", line 67, in uvloop.loop.Handle._run
  File "uvloop/handles/tcp.pyx", line 151, in uvloop.loop.TCPTransport._call_connection_made
  File "uvloop/handles/basetransport.pyx", line 152, in uvloop.loop.UVBaseTransport._call_connection_made
  File "uvloop/handles/basetransport.pyx", line 149, in uvloop.loop.UVBaseTransport._call_connection_made
SystemError: NULL result without error in PyObject_Call
^CTermination request received