[Pkg-dns-devel] Segfault in Knot 2.4.2 on Debian

[Danilo]

Hello

I'm using knot (2.4.2-1+0~20170323113312.21+jessie~1.gbp7bbc33) on
Debian Jessie via the Repository https://deb.knot-dns.cz/knot/.

Every time I get a dynamic zone update (adding a TXT record for Let's
Encrypt verification), Knot segfaults reproducibely. This has not
happened with an older version (not sure when the errors started
appearing, but surely less than 3 months ago).

Here's the log:

Apr 06 00:39:47 sepp knotd[14195]: 2017-04-06T00:39:47 info:
[schlagzeilengenerator.ch.] DDNS, processing 1 updates
Apr 06 00:39:47 sepp knotd[14195]: 2017-04-06T00:39:47 warning:
[schlagzeilengenerator.ch.] discontinuity in chages history (2017011211
-> 2017011206), dropping older changesets
Apr 06 00:39:47 sepp systemd[1]: knot.service: main process exited,
code=killed, status=11/SEGV
Apr 06 00:39:47 sepp systemd[1]: Unit knot.service entered failed state.
Apr 06 00:39:47 sepp systemd[1]: knot.service holdoff time over,
scheduling restart.
Apr 06 00:39:47 sepp systemd[1]: Stopping Knot DNS server...
Apr 06 00:39:47 sepp systemd[1]: Starting Knot DNS server...
Apr 06 00:39:47 sepp systemd[1]: Started Knot DNS server.

Unfortunately I was unable to create a core dump, I'm used to
coredumpctl which is not available on Debian 8.

Any help is appreciated, since my Let's Encrypt certs are expiring soon
and I set them all up to renew automatically via Knot DNS challenge :)

Best,
Danilo