acxz [1] filed a deletion request for ros-melodic-libviso2 [2]:
This package is not part of the ros melodic distribution: http://wiki.ros.org/libviso2 and as such can be deleted.
[1] https://aur.archlinux.org/account/acxz/ [2] https://aur.archlinux.org/pkgbase/ros-melodic-libviso2/
Request #16140 has been rejected by Muflone [1]:
I'm sorry but I cannot understand why this package should be deleted as long it builds fine
aur-requests@lists.archlinux.org