Traceback on Qt console exit

[takluyver]

Start the Qt console, and then type exit to exit it (closing it from the frontend doesn't exhibit the bug). I see this message, repeated twice:

Traceback (most recent call last):
  File "/home/takluyver/.local/lib/python3.4/site-packages/IPython/qt/console/frontend_widget.py", line 812, in _document_contents_change
    self._call_tip()
  File "/home/takluyver/.local/lib/python3.4/site-packages/IPython/qt/console/frontend_widget.py", line 724, in _call_tip
    msg_id = self.kernel_client.inspect(code, cursor_pos)
  File "/home/takluyver/.local/lib/python3.4/site-packages/IPython/kernel/channels.py", line 326, in inspect
    self._queue_send(msg)
  File "/home/takluyver/.local/lib/python3.4/site-packages/IPython/kernel/channels.py", line 171, in _queue_send
    self.ioloop.add_callback(thread_send)
  File "/usr/lib/python3/dist-packages/tornado/ioloop.py", line 732, in add_callback
    raise RuntimeError("IOLoop is closing")
RuntimeError: IOLoop is closing

If you suspect this is an IPython bug, please report it at:
    https://github.com/ipython/ipython/issues
or send an email to the mailing list at ipython-dev@scipy.org

You can print a more detailed traceback right now with "%tb", or use "%debug"
to interactively debug it.

Extra-detailed tracebacks for bug-reporting purposes can be enabled via:
    c.Application.verbose_crash=True