See the tracker bug. if [ "$(get_major_version ${REPLACING_VERSIONS})" == "0" ]; then This is going to fail hard when RV is empty or has >1 value.
commit c87b6e191a7aafc90b474e737168f311c112f328 Author: Justin Bronder <jsbronder@gentoo.org> Date: Thu Aug 18 15:09:50 2016 -0400 net-nntp/sabnzbd: REPLACING_VERSIONS is a list Fixes #589500 Package-Manager: portage-2.2.28