1.7.1 added support for OTP 20.
Since there is no erlang 21, how do you know it'll break?
(In reply to Tomáš Mózes from comment #1) > Since there is no erlang 21, how do you know it'll break? Because CouchDB's configure checks for Erlang versions up to 20. Trust me, it's a feature.
Fixed: commit 5607eebbfbf74027941f8d5a09d791258ebfcbe3 Author: Dirkjan Ochtman <djc@gentoo.org> Date: Sun Nov 19 20:37:16 2017 +0100 dev-db/couchdb: allow erlang-20 (fixes bug 637556) Package-Manager: Portage-2.3.13, Repoman-2.3.3