(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /home/dx/.rr/bitlbee-6/mmap_4_hardlink_bitlbee

Program received signal SIGTRAP, Trace/breakpoint trap.
0x00007fd1521bbd80 in _start () from /lib64/ld-linux-x86-64.so.2
(gdb) c
Continuing.
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?

Program received signal SIGSEGV, Segmentation fault.
0x00007fd152461fb7 in twitter_msg_add_id (ic=0x7fd15310c220, txs=0x7fd1536b46e0, prefix=0x7fd152473dfc "")
    at twitter_lib.c:688
688                     if (txs->id > tud->last_id) {
(gdb) p tud
$5 = (struct twitter_user_data *) 0x0
(gdb) l
683
684             if (txs->user && txs->user->screen_name &&
685                 (bu = bee_user_by_handle(ic->bee, ic, txs->user->screen_name))) {
686                     struct twitter_user_data *tud = bu->data;
687
688                     if (txs->id > tud->last_id) {
689                             tud->last_id = txs->id;
690                             tud->last_time = txs->created_at;
691                     }
692             }
(gdb) watch -l bu->data
Hardware watchpoint 2: -location bu->data
(gdb) reverse-continue
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x00007fd152461fb7 in twitter_msg_add_id (ic=0x7fd15310c220, txs=0x7fd1536b46e0, prefix=0x7fd152473dfc "")
    at twitter_lib.c:688
688                     if (txs->id > tud->last_id) {
(gdb) reverse-continue
Continuing.
Hardware watchpoint 2: -location bu->data

Old value = (void *) 0x0
New value = (void *) 0x7fd15355a540
fb_cb_api_contacts (api=0x7fd15357f190, users=<optimized out>, complete=1, data=0x7fd15357c830) at facebook.c:144
144                 bu->data = NULL;