QA Notice: ECLASS 'mount-boot' inherited illegally in sys-apps/memtest86-3.0-r1 from portage-2.0.51_rc1 when trying to unmerge sys-apps/memtest86-3.0-r1
considering 3.0-r1 isnt in the portage tree and the inherit lines have never been wrong, i'm going to assume this is just the bug that happens when updating your cache to the new format