(gdb) bt full
#0  0x080ebf77 in sched_context_destroy (con=0x960bf78) at sched.c:96
        cur = (struct sched *) 0x47c57199
        s = (struct sched *) 0x0
        __PRETTY_FUNCTION__ = "sched_context_destroy"
#1  0x08080af3 in ast_hangup (chan=0x9837130) at channel.c:1741
        res = 0
        cdr = (struct ast_cdr *) 0x0
        __PRETTY_FUNCTION__ = "ast_hangup"
#2  0x080c0a3b in __ast_pbx_run (c=0x9837130) at pbx.c:2543
        found = 1
        res = 0
        autoloopflag = 0
        error = 1
        __PRETTY_FUNCTION__ = "__ast_pbx_run"
#3  0x080c0c0d in pbx_thread (data=0x9837130) at pbx.c:2603
        c = (struct ast_channel *) 0x9837130
#4  0x080fa80d in dummy_start (data=0x98443a8) at utils.c:793
        _buffer = {__routine = 0x80696c8 <ast_unregister_thread>, __arg = 0x1e1eba0, __canceltype = 31581128,
  __prev = 0x0}
        ret = (void *) 0x5306f4
        a = {start_routine = 0x80c0bf6 <pbx_thread>, data = 0x9837130,
  name = 0x98d6230 "pbx_thread", ' ' <repeats 11 times>, "started at [ 2627] pbx.c ast_pbx_start()"}
        __PRETTY_FUNCTION__ = "dummy_start"
#5  0x005ee3cc in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#6  0x004d2c3e in clone () from /lib/tls/libc.so.6
No symbol table info available.