Comment 3 for bug 1807627

it is the post-installation script that always returns 1, after throwing errors about unsafe symlinks encountered in /var/log/journal/. but there are no symlinks at all. Seems it is the systemd-tmpfiles --create call that throws this errors.

Unfortunately this leavea you with an inconsistent system in the middle of an release upgrade and no way out of this mess. So please set the importance to severe!

Btw, my system was a fully updated 16.04 with hwe/i386 that is now broken an the half way to 18.04.