It looks like the same bug had been fixed in Dec 2018 https://github.com /mate-desktop/caja/issues/1046. Ubuntu-Mate 18.04 is apparently still broken.
** Bug watch added: github.com/mate-desktop/caja/issues #1046 https://github.com/mate-desktop/caja/issues/1046 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1857207 Title: Caja crash on "Safely remove drive" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/caja/+bug/1857207/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs