Core was generated by `asterisk'.
Program terminated with signal 11, Segmentation fault.
#0  0x014c9d1c in ao2_unlock@plt ()
   from /usr/lib/asterisk/modules/res_timing_pthread.so
(gdb) bt
#0  0x014c9d1c in ao2_unlock@plt ()
   from /usr/lib/asterisk/modules/res_timing_pthread.so
#1  0x014ca254 in pthread_timer_ack (handle=1314, quantity=1)
    at res_timing_pthread.c:200
#2  0x08150196 in ast_timer_ack (handle=0xaa6eac68, quantity=1) at timing.c:169
#3  0x08098756 in __ast_read (chan=0xaa6ea850, dropaudio=0) at channel.c:2711
#4  0x0809a25d in ast_read (chan=0xaa6ea850) at channel.c:3098
#5  0x080d6475 in waitstream_core (c=0xaa6ea850, breakon=0xaa5439fa "", 
    forward=0x819be72 "", reverse=0x819be72 "", skip_ms=0, audiofd=-1, 
    cmdfd=1316, context=0x0) at file.c:1232
#6  0x080d698b in ast_waitstream_full (c=0xaa6ea850, breakon=0xaa5439fa "", 
    audiofd=-1, cmdfd=1316) at file.c:1323
#7  0x04f43b6a in handle_streamfile (chan=0xaa6ea850, agi=0xaa54425c, argc=5, 
    argv=0xaa543744) at res_agi.c:1225
#8  0x04f47ef8 in agi_handle_command (chan=0xaa6ea850, agi=0xaa54425c, 
    buf=0xaa5439d4 "STREAM", dead=0) at res_agi.c:2802
#9  0x04f4888f in run_agi (chan=0xaa6ea850, 
    request=0xaa544484 "agi://127.0.0.1/ptsmart_php.php", agi=0xaa54425c, 
    pid=-1, status=0xaa544250, dead=0, argc=1, argv=0xaa544274)
    at res_agi.c:2962
#10 0x04f49d7e in agi_exec_full (chan=0xaa6ea850, data=0xaa546e78, enhanced=0, 
    dead=0) at res_agi.c:3248
#11 0x04f49ef2 in agi_exec (chan=0xaa6ea850, data=0xaa546e78) at res_agi.c:3282
---Type <return> to continue, or q <return> to quit--- 
#12 0x080fa764 in pbx_exec (c=0xaa6ea850, app=0xb7e9c048, data=0xaa546e78)
    at pbx.c:1348
#13 0x08102493 in pbx_extension_helper (c=0xaa6ea850, con=0x0, 
    context=0xaa6eaac4 "default", exten=0xaa6eab14 "2393629172", priority=1, 
    label=0x0, callerid=0xaa6eac88 "sipp", action=E_SPAWN, found=0xaa5492ec, 
    combined_find_spawn=1) at pbx.c:3711
#14 0x0810392c in ast_spawn_extension (c=0xaa6ea850, 
    context=0xaa6eaac4 "default", exten=0xaa6eab14 "2393629172", priority=1, 
    callerid=0xaa6eac88 "sipp", found=0xaa5492ec, combined_find_spawn=1)
    at pbx.c:4170
#15 0x08103fcd in __ast_pbx_run (c=0xaa6ea850, args=0x0) at pbx.c:4264
#16 0x08105426 in pbx_thread (data=0xaa6ea850) at pbx.c:4551
#17 0x081589a0 in dummy_start (data=0xaa4e7e78) at utils.c:968
#18 0x0081846b in start_thread () from /lib/libpthread.so.0
#19 0x0070ddbe in clone () from /lib/libc.so.6
(gdb)