I've applied the patch in the debian bug report locally, and openntpd has run smooth ever since. Reproducible: Always Steps to Reproduce: Emerge openntpd on a system without ipv6, start it and wait a week or two. Maybe the DNS used for lookups must be of a sort that returns ipv6 answers too, I don't know. Actual Results: openntpd prints a warning and dies Expected Results: openntpd prints a warning and continues
this is in openntpd-3.9_p1-r3 via debian patchset