(ITS#6452) Able to crash slapd when using identity assertion

[j@gropefruit.com]

Full_Name: J
Version: 2.4.20
OS: Debian-Lenny/amd64
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (68.15.14.98)


Able to do all necessary identity assertion when using command-line tools
(ldapsearch, ldapmodify, etc) against my server.  Server is running back_ldap,
back_relay, pcache and back_hdb.

But when I point one of my test hosts (Debian Lenny) against this seemingly
healthy server and I try to login, I get this while running slapd -d -1:

[rw] searchEntryDN: "uid=jay,cn=plain,cn=auth,dc=example,dc=com" ->
"uid=jay,cn=plain,cn=auth,dc=example,dc=com"
slapd: /usr/src/openldap-src-2.4.20/openldap-2.4.20/servers/slapd/entry.c:483:
entry_clean: Assertion `e->e_private == ((void *)0)' failed.
Aborted

Why?