(gdb) bt
#0 0x2837f537 in pthread_testcancel () from /lib/libpthread.so.2
#1 0x2836e89a in sigaction () from /lib/libpthread.so.2
#2 0x2836888d in pthread_kill () from /lib/libpthread.so.2
#3 0x28368256 in raise () from /lib/libpthread.so.2
#4 0x28442e34 in abort () from /lib/libc.so.6
#5 0x2841f060 in __assert () from /lib/libc.so.6
#6 0x080aad9e in entry_schema_check (op=0xcecfa0c0, e=0xacbfac0, oldattrs=0x0, manage=0, text=0xcecfa094, textbuf=0xcecf9f10 "╓'8(", textlen=256) at schema_check.c:87
#7 0x286908a3 in bdb_add (op=0xcecfa0c0, rs=0xcecfa080) at add.c:63
#8 0x080ec0b5 in accesslog_response (op=0x8279400, rs=0xcecfad90) at accesslog.c:1175
#9 0x080db272 in over_back_response (op=0x8279400, rs=0xcecfad90) at backover.c:236
#10 0x08080a75 in send_ldap_response (op=0x8279400, rs=0xcecfad90) at result.c:303
#11 0x080818ac in slap_send_ldap_result (op=0x8279400, rs=0xcecfad90) at result.c:574
#12 0x08113e35 in unique_modify (op=0x8279400, rs=0xcecfad90) at unique.c:490
#13 0x080db309 in overlay_op_walk (op=0x8279400, rs=0xcecfad90, which=op_modify, oi=0x8214f00, on=0x8216100) at backover.c:498
#14 0x080db543 in over_op_func (op=0x8279400, rs=0xcecfad90, which=op_modify) at backover.c:560
#15 0x080db650 in over_op_modify (op=0x8279400, rs=0xcecfad90) at backover.c:594
#16 0x0808b0c6 in fe_op_modify (op=0x8279400, rs=0xcecfad90) at modify.c:395
#17 0x0808a33e in do_modify (op=0x8279400, rs=0xcecfad90) at modify.c:200
#18 0x0806fb84 in connection_operation (ctx=0xcecfae20, arg_v=0x8279400) at connection.c:1133
#19 0x281b36ad in ldap_int_thread_pool_wrapper () from /usr/local/lib/libldap_r-2.3.so.2
#20 0x283703a5 in pthread_create () from /lib/libpthread.so.2
#21 0x2842e3df in _ctx_start () from /lib/libc.so.6
(gdb) info threads
7 Thread 0x818b000 (sleeping) 0x28377f9b in pthread_mutexattr_init () from /lib/libpthread.so.2
6 Thread 0x8267400 (LWP 100039) 0x2837f4f7 in pthread_testcancel () from /lib/libpthread.so.2
5 Thread 0x8267c00 (runnable) 0x2844658b in select () from /lib/libc.so.6
4 Thread 0x8267e00 (sleeping) 0x28377f9b in pthread_mutexattr_init () from /lib/libpthread.so.2
* 3 Thread 0x8279000 (LWP 100113) 0x2837f537 in pthread_testcancel () from /lib/libpthread.so.2
2 Thread 0x8279200 (sleeping) 0x28377f9b in pthread_mutexattr_init () from /lib/libpthread.so.2
1 Thread 0xacc2a00 (sleeping) 0x28377f9b in pthread_mutexattr_init () from /lib/libpthread.so.2
(gdb) frame 6
#6 0x080aad9e in entry_schema_check (op=0xcecfa0c0, e=0xacbfac0, oldattrs=0x0, manage=0, text=0xcecfa094, textbuf=0xcecf9f10 "╓'8(", textlen=256) at schema_check.c:87
87 schema_check.c: No such file or directory.
in schema_check.c
(gdb) p *a
$1 = {a_desc = 0x81dad20, a_vals = 0xacb2940, a_nvals = 0xacb2940, a_next = 0xaca0840, a_flags = 0}
(gdb) p a->a_vals[0].bv_val
$2 = 0x0
(gdb) p a->a_vals[0]
$3 = {bv_len = 0, bv_val = 0x0}