While support for the i386 installer image was removed, the 32 packages still exist in the archive so an upgrade from Ubuntu 16.04 to Ubuntu 18.04 should be fine. Just to be certain I tested this today and everything worked out. Do you happen to have any more details about how everything was messed up? Specifically log files of the upgrade would be helpful.
** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1769433 Title: do-release-upgrade from 32-bit 16.04 to 18.04 goes ahead, doesn't work and messes everything up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1769433/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs