asyncio does not always show the full traceback

[INADA Naoki]

Could you use 3.6.0 instead of b4?

I added 1/0 at:

...
async def main():
   1/0
   await aenum()
...

then:

$ pyenv/versions/3.6.0/bin/python3 -VV
Python 3.6.0 (default, Jan 16 2017, 19:41:10)
[GCC 6.2.0 20161005]

$ pyenv/versions/3.6.0/bin/python3 a.py
Traceback (most recent call last):
  File "a.py", line 25, in <module>
    loop.run_until_complete(main())
  File "/home/inada-n/pyenv/versions/3.6.0/lib/python3.6/asyncio/base_events.py",
line 466, in run_until_complete
    return future.result()
  File "a.py", line 21, in main
    1/0
ZeroDivisionError: division by zero