ncurses 6.0_p20171125-r0 crashes neovim and tmux
I had to revert to ncurses-6.0_p20170701-r1 or my computer is completely unusable.
nvim crashes in libunibilium therefore I think we have this problem:
https://github.com/mauke/unibilium/issues/30
(from redmine: issue id 8469, created on 2018-02-02)