Thank you Axel, for having a look. I am in the process of creating the requested information and will make it available to you privately. Not sure if that's necessary, though as it should be fairly easy to reproduce this problem.
1) create jammy chroot/VM 2) add focal to sources.list 3) install autoradio, python-is-python2 and python3-six from focal 4) sudo aptitude and try to update autoradio (I assume this will trigger the resolver, let it choose to upgrade autoradio to jammy and keep the other focal packages around) 5) I was surprised to find that despite choosing a resolution from aptitude resolver, aptitude shows broken packages at this point 6) hit g and witness the crash ** Changed in: aptitude (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1959485 Title: reproducible crash in jammy: Uncaught exception: ../../src/ui.cc:1549: void auto_fix_broken(): Assertion "resman->resolver_exists()" failed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/aptitude/+bug/1959485/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs