r2 fixes a runtime crash which is present in r1, see https://bugs.gentoo.org/699972 Please stabilize. There is an open bug against all current ebuilds - https://bugs.gentoo.org/707418 , it is about -fno-common / GCC 10 compatibility. It is being worked on, but since GCC 10 has not hit stable status yet, it shouldn't be a blocker for this stabilization request.
amd64 stable
x86 stable. Closing.