My apologies for the terrible description. Your attempt to run /usr/share/squid-deb-proxy-client/apt-avahi-discover through python3 on bionic will run into problems. There are many other cases like this on bionic if you switch to python3 as default.
** Tags added: bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1831306 Title: squid-deb-proxy is a python2 script To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/squid-deb-proxy/+bug/1831306/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
