Thanks
SLOT=4 and =5 should both be removed as soon as SLOT=6 is stabilized. In fact, considering the package is barely maintained at all, we could even drop stable keywords completely and just keep eric:6 in testing.
eric:4 is gone https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=fa7e3e5de171348ca4a1e9f0aa417c11aae8b1a1