This is due to corrupted index files (likely an incomplete download) and can be solved by removing the content of /var/lib/apt/lists
sudo rm -r /var/lib/apt/lists/* (or just the corrupted file if you can identify it) Anyway it would be nice if this could be handled in a better way. It is unavoidable that it happens every now and then and most users do not have a clue about what to do. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/780110 Title: Handle SystemError in apt.cache.Cache.required_download properly To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/aptdaemon/+bug/780110/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
