$ cd ../scripts
$ xvfb-run -a python3 minimal_example_perovskite_100.py
/usr/lib/python3/dist-packages/h5py/__init__.py:34: FutureWarning: Conversion of the second argument of issubdtype from `float` to `np.floating` is deprecated. In future, it will be treated as `np.float64 == np.dtype(float).type`.
  from ._conv import register_converters as _register_converters
WARNING:hyperspy_gui_traitsui:The TkAgg matplotlib backend is not supported by the installed traitsui version and the ETS toolkit has been set to null. To set the ETS toolkit independently from the matplotlib backend, set it before importing matplotlib. See http://hyperspy.readthedocs.io/en/stable/user_guide/getting_started.html for more information.
WARNING:hyperspy_gui_traitsui:The traitsui GUI elements are not available.

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100%|##########| 1079/1079 [00:00<00:00, 3577.82it/s]Segmentation fault (core dumped)
section_end:1543080715:build_script
section_start:1543080715:after_script
section_end:1543080716:after_script
section_start:1543080716:upload_artifacts_on_failure
section_end:1543080718:upload_artifacts_on_failure
ERROR: Job failed: exit code 1