SystemError: NULL result without error in PyObject_Call

[kamilgregorczyk]

I tried to run it on debian & macOS with python 3.6,
I'm getting such error on every request:

➜  ~ python3 test.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 52, in uvloop.loop.Handle._run
  File "uvloop/handles/tcp.pyx", line 149, in uvloop.loop.TCPTransport._call_connection_made
  File "uvloop/handles/basetransport.pyx", line 156, in uvloop.loop.UVBaseTransport._call_connection_made
  File "uvloop/handles/basetransport.pyx", line 153, in uvloop.loop.UVBaseTransport._call_connection_made
SystemError: NULL result without error in PyObject_Call
Exception in callback UVTransport._call_connection_made
handle: <Handle UVTransport._call_connection_made>
Traceback (most recent call last):
  File "uvloop/cbhandles.pyx", line 52, in uvloop.loop.Handle._run
  File "uvloop/handles/tcp.pyx", line 149, in uvloop.loop.TCPTransport._call_connection_made
  File "uvloop/handles/basetransport.pyx", line 156, in uvloop.loop.UVBaseTransport._call_connection_made
  File "uvloop/handles/basetransport.pyx", line 153, in uvloop.loop.UVBaseTransport._call_connection_made
SystemError: NULL result without error in PyObject_Call

[squeaky-pl]

Duplicate of #99