1319 of rlm_ldap.c , gdb debugging shows me that vals[0] is not a valid memory location. (always 0xffffffffb00020e0)Try running it without the LDAP module. If it works, then the ldap module, or the LDAP libraries it uses aren't 64-bit clean.
if that's the case, why do you think it seems to work fine single threaded? Joe - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html

