Upgrading by hand with dist-upgrade isn't supported. You really should be using do-release-upgrade.
I could trivially reproduce this in a minimal chroot with python installed in it. Upgrading apt before dist-upgrading avoided the problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/990740 Title: upgrading from lucid to precise fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-defaults/+bug/990740/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
