On 2.5.12, slapd crashes during bind operations on relay entries with rwm and ppolicy both enabled. A simple way to reproduce this issue is to edit tests/scripts/relay and tests/data/slapd-relay.conf as follows, and then run test030-relay. I think this issue is the same as ITS#7966 reported in 2014.

--- tests/scripts/relay.orig	2022-05-04 07:57:30.000000000 -0700
+++ tests/scripts/relay	2022-06-23 17:16:42.020652093 -0700
@@ -356,6 +356,16 @@
 	exit 1
 fi
 
+$LDAPADD -D "$MANAGERDN" -H $URI1 -w $PASSWD <<EOF > /dev/null 2>&1
+dn: cn=ppolicy,dc=example,dc=com
+objectClass: top
+objectClass: device
+objectClass: pwdPolicy
+cn: ppolicy
+pwdMinLength: 5
+pwdAttribute: userPassword
+EOF
+
 BASEDN="o=Example,c=US"
 echo "Changing password to database \"$BASEDN\"..."
 $LDAPPASSWD -H $URI1 -D "cn=Manager,$BASEDN" -w $PASSWD \


--- tests/data/slapd-relay.conf.orig	2022-05-04 07:57:30.000000000 -0700
+++ tests/data/slapd-relay.conf	2022-06-23 16:57:15.184456120 -0700
@@ -31,6 +31,8 @@
 #metamod#moduleload back_meta.la
 #rwmmod#modulepath ../servers/slapd/overlays/
 #rwmmod#moduleload rwm.la
+#ppolicymod#modulepath ../servers/slapd/overlays/
+#ppolicymod#moduleload ppolicy.la
 
 #######################################################################
 # database definitions
@@ -46,6 +48,9 @@
 #ndb#dbname db_1
 #ndb#include @DATADIR@/ndb.conf
 
+overlay ppolicy
+ppolicy_default cn=ppolicy,dc=example,dc=com
+
 database	@RELAY@
 suffix		"o=Example,c=US"
 ### back-relay can automatically instantiate the rwm overlay