If libc6 is not in reboot-required.pkgs you can upgrade to the next release.
bdmurray@clean-bionic-amd64:/tmp$ cat /run/reboot-required.pkgs evolution-data-server linux-base bdmurray@clean-bionic-amd64:/tmp$ do-release-upgrade -d Checking for a new Ubuntu release Get:1 Upgrade tool signature [819 B] Get:2 Upgrade tool [1,263 kB] Fetched 1,264 kB in 0s (0 B/s) authenticate 'cosmic.tar.gz' against 'cosmic.tar.gz.gpg' extracting 'cosmic.tar.gz' If libc6 is in it though you cannot upgrade to the next release. bdmurray@clean-bionic-amd64:/tmp$ cat /run/reboot-required.pkgs evolution-data-server linux-base libc6 bdmurray@clean-bionic-amd64:/tmp$ do-release-upgrade -d Checking for a new Ubuntu release You have not rebooted after updating a package which requires a reboot. Please reboot before upgrading. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1797209 Title: do-release-upgrade should block release upgrades in some circumstances To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1797209/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
