On Fri, Jul 14, 2017 at 09:02:18AM +0000, russell(a)samknows.com wrote: If no indexes remain, mdb_attr_dbs_open calls ch_calloc(1, 0), but ch_malloc/ch_calloc do not expect that. I'd fix ch_calloc/ch_malloc, but depends whether that's the right thing to do, is it intentional to assert when a zero size is requested? ber_memalloc has an assert there if LDAP_MEMORY_DEBUG has the second bit set. Hallvard, Howard? If it's fine to change the ch_ functions, then a patch is available at ftp://ftp.openldap.org/incoming/Ondrej-Kuznik-20170714-ITS-8472.patch -- Ondřej Kuzník Senior Software Engineer Symas Corporation http://www.symas.com Packaged, certified, and supported LDAP solutions powered by OpenLDAP