Comment 28 for bug 896836

Still present in Ubuntu 18.04, using the python3.6 prompt in the shell:

```
>>> help('modules')

Please wait a moment while I gather a list of all available modules...

[ecc] warning: libsecp256k1 library not available, falling back to python-ecdsa
WARNING:root:can not import unity GI Namespace Dbusmenu not available
/usr/lib/python3/dist-packages/matplotlib/cbook/deprecation.py:106: MatplotlibDeprecationWarning: The mpl_toolkits.axes_grid module was deprecated in version 2.1. Use mpl_toolkits.axes_grid1 and mpl_toolkits.axisartist provies the same functionality instead.
  warnings.warn(message, mplDeprecation, stacklevel=1)
Segmentation fault
```

No issue when doing the same thing with Python 3.7.1 provided by Anaconda.