The error occurs at line "v = yield from q.get()":

Traceback (most recent call last):
  File "/home/haypo/prog/python/default/Lib/asyncio/events.py", line 39, in _run
    self._callback(*self._args)
  File "/home/haypo/prog/python/default/Lib/asyncio/tasks.py", line 357, in _wakeup
    self._step(value, None)
  File "/home/haypo/prog/python/default/Lib/asyncio/tasks.py", line 309, in _step
    self.set_exception(exc)
  File "/home/haypo/prog/python/default/Lib/asyncio/tasks.py", line 301, in _step
    result = coro.send(value)
  File "put_get_bug.py", line 23, in t2
    v = yield from q.get()
TypeError: send() takes 2 positional arguments but 7 were given

Task._step() is called with value=(0, 1, 2, 3, 4, 5) (and exc is None).