This isn't a bug on Launchpad itself (i.e. the launchpad.net website). Moving to Ubuntu libffi, although I rather suspect this should actually be a support request considering the very large volume of errors from apt-get update. If I were you I would sort those out first, probably by upgrading to at least bionic rather than having a weird completely unsupported mix of vivid, xenial, and artful on your system.
** Project changed: launchpad => libffi (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1917620 Title: failed to install libffi-dev package To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libffi/+bug/1917620/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
