(gdb) bt
#0  0xb7dbc473 in strlen () from /lib/tls/i686/cmov/libc.so.6
#1  0xb7d90164 in vfprintf () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7dadf91 in vsnprintf () from /lib/tls/i686/cmov/libc.so.6
#3  0x0810ff0c in ast_dynamic_str_thread_build_va (buf=0xb639afc8, max_len=0,
    ts=0x816c8c0, append=0,
    fmt=0x8162b50 "=== ---> %sLock #%d (%s): %s %d %s %s %p (%d)\n",
    ap=0xb639afe8 "x)\026\b") at utils.c:1246
#4  0x0808ee22 in ast_cli (fd=40,
    fmt=0x8162b50 "=== ---> %sLock #%d (%s): %s %d %s %s %p (%d)\n")
    at cli.c:69
#5  0x0810ef22 in handle_show_locks (fd=40, argc=3, argv=0xb639b070)
    at utils.c:723
#6  0x08095524 in ast_cli_command (fd=40, s=0xb639b1bc "core show locks")
    at cli.c:1979
#7  0x0806ba30 in netconsole (vconsole=0x8189880) at asterisk.c:939
#8  0x0810f098 in dummy_start (data=0x82733e8) at utils.c:806
#9  0xb7f01240 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#10 0xb7e1c4ae in clone () from /lib/tls/i686/cmov/libc.so.6