jupyter notebook --generatte config uninterruptible and crash.

[Carreau]

$ ipython notebook --generate-config
[W 10:20:49.726 NotebookApp] ipywidgets package not installed.  Widgets are unavailable.
[I 10:20:49.733 NotebookApp] The port 8888 is already in use, trying another random port.
Overwrite /Users/bussonniermatthias/.jupyter/jupyter_notebook_config.py with default config? [y/N]^C[I 10:20:51.330 NotebookApp] interrupted
Serving notebooks from local directory: /Users/bussonniermatthias/.jupyter
0 active kernels
The Jupyter Notebook is running at: http://localhost:8889/
Shutdown this notebook server (y/[n])? 
^C[C 10:20:51.617 NotebookApp] received signal 2, stopping
^C[C 10:20:52.369 NotebookApp] received signal 2, stopping
...                                                       (pressin ^C frenetically) 
^C[C 10:20:56.250 NotebookApp] received signal 2, stopping
No answer for 5s: resuming operation...
^C[C 10:20:56.390 NotebookApp] received signal 2, stopping
...
^C[C 10:20:56.603 NotebookApp] received signal 2, stopping
n                                                            (pressing N) 
Traceback (most recent call last):
  File "/Users/bussonniermatthias/anaconda3/bin/ipython", line 9, in <module>
    load_entry_point('ipython==4.0.0.dev0', 'console_scripts', 'ipython')()
  File "/Users/bussonniermatthias/dev/ipython/IPython/__init__.py", line 118, in start_ipython
    return launch_new_instance(argv=argv, **kwargs)
  File "/Users/bussonniermatthias/dev/traitlets/traitlets/config/application.py", line 581, in launch_instance
    app.start()
  File "/Users/bussonniermatthias/dev/ipython/IPython/terminal/ipapp.py", line 349, in start
    return self.subapp.start()
  File "/Users/bussonniermatthias/dev/notebook/notebook/notebookapp.py", line 1062, in start
    super(NotebookApp, self).start()
  File "/Users/bussonniermatthias/anaconda3/lib/python3.4/site-packages/jupyter_core/application.py", line 255, in start
    raise NoStart()
jupyter_core.application.NoStart

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