I also verified this for an upgrade from Bionic to Disco, after hacking at meta-release-proposed.
bdmurray@clean-bionic-amd64:~$ grep conffile /var/log/dist-upgrade/main.log 2019-05-14 22:37:36,972 WARNING got a conffile-prompt from dpkg for file: '/etc/update-manager/release-upgrades' 2019-05-14 22:37:41,977 WARNING replied no to the conffile-prompt for file: '/etc/update-manager/release-upgrades' bdmurray@clean-bionic-amd64:~$ head -n10 /var/log/dist-upgrade/main.log 2019-05-14 22:18:11,371 INFO Using config files '['./DistUpgrade.cfg.bionic']' 2019-05-14 22:18:11,371 INFO uname information: 'Linux clean-bionic-amd64 4.15.0-48-generic #51-Ubuntu SMP Wed Apr 3 08:28:49 UTC 2019 x86_64' 2019-05-14 22:18:11,702 INFO apt version: '1.6.10' 2019-05-14 22:18:11,702 INFO python version: '3.6.7 (default, Oct 22 2018, 11:32:17) [GCC 8.2.0]' 2019-05-14 22:18:11,704 INFO release-upgrader version '19.04.16.5' started 2019-05-14 22:18:11,715 INFO locale: 'en_US' 'UTF-8' 2019-05-14 22:18:11,783 DEBUG setting up environ for non-interactive use 2019-05-14 22:18:11,842 DEBUG Using 'DistUpgradeViewNonInteractive' view 2019-05-14 22:18:11,877 DEBUG enable dpkg --force-overwrite ** Tags removed: verification-needed verification-needed-disco ** Tags added: verification-done verification-done-disco -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1796193 Title: DistUpgradeViewNonInteractive crashes / requires interaction To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1796193/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs