Following updates happened:
portage-2.4.1 which brings EAPI=6 updates:
genkernel-18.104.22.168 minor update which has cache directory location change from /var/cache/genkernel to /usr/share/genekernel/ to keep helper tarballs preserved in /usr/share/genkernel/src. It is *required* to check /etc/genkernel.conf, if any hand-made changes done to this file and ensure portage updated it correctly to have new cache directory entries.
perl-5.22.1 minor update, which require running perl-cleaner --all after update.