Comment # 11 on bug 934901 from Dr. Werner Fink

(In reply to Antoine Belvire from comment #10)

OK ... it is very interesting that no one has informed the local systemd people
about this change.  And also that this seems to be a `temporary' problem.

Also from the commit I can read:

> So to ensure unpleasentness if people do decide to restart systemd-logind
> anyways (or when it crashes), monitor logind going away and make this a fatal
> error. This avoids getting a hard-hung machine on the next vt-switch and will
> hopefully quickly educate users to not restart systemd-logind while they have
> an X session using it active.

.. "quickly educate users" isn't very nice.