Both openjdk-bin-8.265_p01 and icedtea-bin-3.16.0 utilize the java-vm-2.eclass. In both installs the following symlinks are incorrect. From the image folders ls -al usr/lib/jvm/openjdk-bin-8 lrwxrwxrwx 1 strogdon math 26 Sep 5 11:42 usr/lib/jvm/openjdk-bin-8 -> /opt/openjdk-bin-8.265_p01 ls -al usr/lib/jvm/icedtea-bin-8 lrwxrwxrwx 1 strogdon math 23 Sep 5 11:43 usr/lib/jvm/icedtea-bin-8 -> /opt/icedtea-bin-3.16.0 There is a missing EPREFIX before the /opt in both cases. These incorrect symlinks break using eselect java-vm to select user and system java-vm.
I suspect this is the same issue as https://bugs.gentoo.org/751805 which has been resolved. For openjdk-bin-8.2772_p10 from the image folder I now have ls -al usr/lib/jvm/openjdk-bin-8 lrwxrwxrwx 1 terry terry 54 Apr 2 08:59 usr/lib/jvm/openjdk-bin-8 -> /storage/strogdon/gentoo-rap/opt/openjdk-bin-8.272_p10 which is correct.