It seems to core dump at shut down even with a very basic config and no sip traffic (just start and then stop):
``` debug=2 log_stderror=no memdbg=5 memlog=5 log_facility=LOG_LOCAL0 children=1 enable_tls=yes
loadmodule "tls.so" modparam("tls", "config", "/tmp/kamailio-dev/etc/kamailio/tls.cfg")
request_route { ; } ```
Either a buffer overflow in kamailio's tls module initialization, or something not done right for libssl 1.1.0 (init of libssl stuff from kamailio or inside libssl itself).