The fix in 1:26.04.5 keeps the unmigrated files, but they are still never migrated, so the packages they provide are left with no update source at all. Filed as bug #2167655; adding a note here because this is the direct follow-up to the fix in this bug.
I upgraded 24.04 -> 26.04 on 2026-08-19. The upgrader was 26.04.22, well past the fix, and /var/log/dist-upgrade/main.log shows it behaving exactly as designed: DEBUG migrateToDeb822Sources() DEBUG Could not migrate deb [signed-by=/usr/share/keyrings/tailscale-archive-keyring.gpg] https://pkgs.tailscale.com/stable/ubuntu noble main from /etc/apt/sources.list.d/tailscale.list, disabling instead. Nine .list files could not be migrated. Six of them contained an active "deb [signed-by=...]" line and were left with no .sources file and no enabled source at all: Docker, OpenVPN3, Signal, Tailscale, a Chromium-based browser and a cloud storage client. Every one used the syntax its vendor documents. The packages installed from those repositories then stopped receiving updates, unnoticed for weeks, while apt, update-notifier and unattended-upgrades all reported the system as up to date. apt-cache policy showed the installed version with no candidate, and "apt list --installed | grep installed,local" listed them, but nothing surfaced that state. By the time I noticed, the browser was a major version behind and Signal four releases behind. Two notes on the underlying python-apt limitation (#2070432), which was closed Won't Fix on the grounds that migration to deb822 sources would resolve it: * The migration is what fails, so that reasoning does not hold. Reproducer on 26.04 with python3-apt 3.1.0ubuntu1.1: python3 -c 'from aptsources.sourceslist import SourceEntry; \ print(SourceEntry("deb [signed-by=/x.gpg] https://a b c").invalid)' -> True * A python-apt fix alone could not repair this path anyway. The upgrader runs against the *old* release's libraries: my log records apt 2.8.3 and python 3.12.3, and dpkg.log shows python3-apt was still at the noble version when migrateToDeb822Sources ran at 16:27:07 - it was not replaced until 16:47:25, twenty minutes later. Merge proposal handling signed-by inside the migration, leaving python-apt's legacy parser untouched, with tests: https://code.launchpad.net/~zember/ubuntu-release-upgrader/+git/ubuntu-release-upgrader/+merge/512328 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2130273 Title: do-release-upgrade deletes sources.list format entries during update to 25.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/2130273/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
