In my testing, I found a few bugs in my previous patches: slapi_matchingrule_is_compat() was not checking for NULL the matching rule syntax plugin was registering with the INTEGER syntax oid the bin_filter_ava() function needs to be ordering aware to implement the octetStringOrderingMatch in default_mr_filter_create(), make sure the requested matching rule is provided by the given plugin https://bugzilla.redhat.com/show_bug.cgi?id=559315 https://bugzilla.redhat.com/attachment.cgi?id=395827&action=diff https://bugzilla.redhat.com/attachment.cgi?id=395827&action=edit