Hi Pierangelo;
Sorry for the stripped code.
Below you find a backtrace of slapd 2.4.4alpha with the non-stripped code :
(gdb) bt
#0 0x00889d5a in strcmp () from /lib/tls/libc.so.6
#1 0x08068ede in select_backend (dn=0xa2f4df5c, manageDSAit=0, noSubs=0)
at backend.c:684
#2 0x0806a8ac in fe_aux_operational (op=0xa2f4df40, rs=0xa2f4de80)
at backend.c:1779
#3 0x0806a01b in backend_operational (op=0xa2f4df40, rs=0xa2f4de80)
at backend.c:1801
#4 0x080a7d06 in do_syncrepl (ctx=0xa2f4e2a0, arg=0x8695fb0) at syncrepl.c:547
#5 0x081281cb in ldap_int_thread_pool_wrapper (xpool=0x865ad78) at tpool.c:704
#6 0x00bb6371 in start_thread () from /lib/tls/libpthread.so.0
#7 0x008e8ffe in clone () from /lib/tls/libc.so.6
(gdb)
> Likely because you used a stripped binary. Can you reproduce the issue
>with a non-stripped build of HEAD?
>
>p.