I followed the test when upgrading a system from xenial to bionic and it passed. Here we can see that url_downloadable is called only once with the version of the release upgrader in -proposed and that the universe entry is still enabled:
2019-04-15 09:53:30,259 INFO Using config files '['./DistUpgrade.cfg.xenial']' 2019-04-15 09:53:30,260 INFO uname information: 'Linux clean-xenial-amd64 4.15.0-47-generic #50~16.04.1-Ubuntu SMP Fri Mar 15 16:06:21 UTC 2019 x86_64' 2019-04-15 09:53:30,527 INFO apt version: '1.2.31' 2019-04-15 09:53:30,527 INFO python version: '3.5.2 (default, Nov 12 2018, 13:43:14) [GCC 5.4.0 20160609]' 2019-04-15 09:53:30,530 INFO release-upgrader version '18.04.31' started ... 2019-04-15 09:53:41,478 DEBUG examining: 'deb http://ubuntu.osuosl.org/ubuntu xenial main restricted multiverse' 2019-04-15 09:53:41,478 DEBUG verifySourcesListEntry: deb http://ubuntu.osuosl.org/ubuntu bionic main restricted multiverse 2019-04-15 09:53:41,478 DEBUG url_downloadable: http://ubuntu.osuosl.org/ubuntu/dists/bionic/Release 2019-04-15 09:53:41,478 DEBUG s='http' n='ubuntu.osuosl.org' p='/ubuntu/dists/bionic/Release' q='' f='' 2019-04-15 09:53:41,556 DEBUG entry 'deb http://ubuntu.osuosl.org/ubuntu bionic main restricted multiverse' updated to new dist 2019-04-15 09:53:41,556 DEBUG examining: 'deb http://ubuntu.osuosl.org/ubuntu xenial-updates main restricted multiverse' 2019-04-15 09:53:41,557 DEBUG entry 'deb http://ubuntu.osuosl.org/ubuntu bionic-updates main restricted multiverse' updated to new dist 2019-04-15 09:53:41,557 DEBUG examining: 'deb http://ubuntu.osuosl.org/ubuntu xenial-security main restricted multiverse' 2019-04-15 09:53:41,558 DEBUG entry 'deb http://ubuntu.osuosl.org/ubuntu bionic-security main restricted multiverse' updated to new dist 2019-04-15 09:53:41,558 DEBUG examining: 'deb http://ubuntu.osuosl.org/ubuntu xenial universe' 2019-04-15 09:53:41,558 DEBUG entry 'deb http://ubuntu.osuosl.org/ubuntu bionic universe' updated to new dist -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1822886 Title: universe missing after bionic->cosmic do-release-upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1822886/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
