https://bugs.openldap.org/show_bug.cgi?id=9373
--- Comment #4 from Quanah Gibson-Mount quanah@openldap.org --- (In reply to Jin from comment #3)
Updated version. Should be 2.4.44.
2.4.44 is still well over 4 years old, and there have been numerous fixes to libldap since that time. Please use a current release and see if you can reproduce.