stopiteration_deadlock.py

import asyncio
import pytest

@pytest.mark.asyncio
async def test():
  iterator = iter([])
  return await asyncio.get_event_loop().run_in_executor(
    None,
    next,
    iterator
  )  # Deadlock

# This freeze pytest. Test should raise the TypeError of Python:
#  File "<c:\program files (x86)\python35-32\lib\asyncio\futures.py>", line 365, in set_exception
#    raise TypeError("StopIteration interacts badly with generators "
# TypeError: StopIteration interacts badly with generators and cannot be raised into a Future