Released 8 July 2019.
ping. It looks like this version is required to operate rabbitmq in an IPv6-only environment due to https://github.com/rabbitmq/rabbitmq-server/commit/f3de582a935d686ce9610c8a0103761dd2c57a1a I've tried a quick copy-bump to 3.7.17 and that seems to compile. Not tested yet in my IPv6-only environment.
https://github.com/gentoo/gentoo/pull/13115