https://bugs.openldap.org/show_bug.cgi?id=9920
--- Comment #13 from Howard Chu hyc@openldap.org --- Just a reminder - mdb.master3 is a development branch, not a release branch. It's there so that developers can try it and find problems. If you expected it to be production-ready you were misinformed. Only mdb.RE/xx is released for general use.