Hi, Howard.
wwctx.txn may be uninitialized, see lines 712-720 of back-mdb/search.c http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=blob;f=servers/sla...
And therefore mdb_rtxn_snap() may segfault when will called from line 1127. http://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=blob;f=servers/sla...
I think, one of the following should be: - wwctx should be initialize completely at 712; or - an additional condition should be checked at 1123-1125.
Regards, Leonid.