Canned config available: https://stroeder.com/temp/openldap-testbed-its8770.tar.gz
Seg faults with 2.4.45 and current RE24 branch:
$ cd openldap-testbed-its8770 $ ./start-slapd.sh [..] 5a009864 slapd.conf: line 19 (moduleload back_mdb) 5a009864 loaded module back_mdb 5a009864 mdb_back_initialize: initialize MDB backend 5a009864 mdb_back_initialize: LMDB 0.9.21: (June 1, 2017) 5a009864 module back_mdb: null module registered 5a009864 slapd.conf: line 22 (moduleload dsaschema.so schema/oath-ldap-dsa.schema) 5a009864 loaded module dsaschema.so ./start-slapd.sh: line 11: 29304 Segmentation fault (core dumped) ${OPENLDAP_PREFIX}/lib64/slapd -d config,stats,stats2,acl,args,trace,sync -h "ldap://0.0.0.0:2071 ldapi://slapd1-socket" -n slapd-its8770 -f slapd.conf