MarsSeed [1] filed a deletion request for barnowl [2]: Unused Ncurses IM client, discontinued since 2017, uses insecure libraries like openssl-1.0. I recommend deletion. There are maintained alternatives.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/barnowl/
