Erlang/OTP 18.1 has been released. No ebuild changes are required. I haven't done much testing, though.
the same ebuild looks good
FWIW erlang-18.2.1 emerged fine here at a hardened amd64 server (and ejabberd-15.11 too)
Bumped 18.2.1. There were some issues with the wxwidgets 3.0 patch; please test that that stuff still works!