Thanks Howard, here is the info you requested: (gdb) bt #0 test_filter (op=0x40fff7f0, e=0x2aab116ab068, f=0x0) at filterentry.c:69 #1 0x00000000004db315 in syncprov_matchops (op=0x410001b0, opc=0xb096e0, saveit=1) at syncprov.c:1314 #2 0x00000000004db6b5 in syncprov_op_mod (op=0x410001b0, rs=<value optimized out>) at syncprov.c:2124 #3 0x000000000047e62a in overlay_op_walk (op=0x410001b0, rs=0x40ffffc0, which=op_modify, oi=0x8d7ab0, on=0x8dc4f0) at backover.c:659 #4 0x000000000047ec07 in over_op_func (op=0x410001b0, rs=0x40ffffc0, which=op_modify) at backover.c:721 #5 0x000000000047404d in syncrepl_updateCookie (si=0x8d74d0, op=0x410001b0, syncCookie=0x41000b20) at syncrepl.c:3292 #6 0x0000000000478462 in do_syncrep2 (ctx=<value optimized out>, arg=<value optimized out>) at syncrepl.c:1097 #7 do_syncrepl (ctx=<value optimized out>, arg=<value optimized out>) at syncrepl.c:1455 #8 0x00000000004ec5ec in ldap_int_thread_pool_wrapper (xpool=0x84daf0) at tpool.c:685 #9 0x000000301b20673d in start_thread (arg=<value optimized out>) at pthread_create.c:301 #10 0x000000301aad44bd in clone () from /lib64/libc.so.6 (gdb) frame 1 #1 0x00000000004db315 in syncprov_matchops (op=0x410001b0, opc=0xb096e0, saveit=1) at syncprov.c:1314 1314 rc = test_filter( &op2, e, op2.ors_filter ); (gdb) print *ss $1 = {s_next = 0x2aab502177f0, s_base = {bv_len = 16, bv_val = 0x2aab730920e0 "dc=test12,dc=net"}, s_eid = 1, s_op = 0x230ea90, s_rid = 1, s_sid = -1, s_filterstr = {bv_len = 15, bv_val = 0x230f7d0 "(objectClass=*)"}, s_flags = 1, s_inuse = 1, s_res = 0x2aababca90f0, s_restail = 0x2aabc320d920, s_mutex = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}}