(gdb) bt full
#0  0x006ec7a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
No symbol table info available.
#1  0x0072c955 in raise () from /lib/tls/libc.so.6
No symbol table info available.
#2  0x0072e319 in abort () from /lib/tls/libc.so.6
No symbol table info available.
#3  0x00765a1b in malloc_printerr () from /lib/tls/libc.so.6
No symbol table info available.
#4  0x007662fa in _int_free () from /lib/tls/libc.so.6
No symbol table info available.
#5  0x007664ba in free () from /lib/tls/libc.so.6
No symbol table info available.
#6  0x080aca7e in ast_rtp_destroy (rtp=0x827ff4) at rtp.c:1077
No locals.
#7  0xb7c63c30 in __sip_destroy (p=0x69d8, lockowner=1) at chan_sip.c:2112
        newcount = 136984112
        cur = (struct sip_pvt *) 0x6
        prev = (struct sip_pvt *) 0x0
        cp = (struct sip_pkt *) 0x82a3630
        __PRETTY_FUNCTION__ = "__sip_destroy"
#8  0xb7c70962 in __sip_autodestruct (data=0x8173a30) at chan_sip.c:2265
        __PRETTY_FUNCTION__ = "__sip_autodestruct"
#9  0x080565b8 in ast_sched_runq (con=0x812e9d0) at sched.c:373
        tv = warning: Unhandled dwarf expresion opcode DW_OP_piece
{tv_sec = 0, tv_usec = 6}
        x = 0
        res = 866905
#10 0xb7c9c051 in do_monitor (data=0x0) at chan_sip.c:11251
        res = 0
        sip = (struct sip_pvt *) 0x812e9d0
        peer = (struct sip_peer *) 0x0
        t = 1132593280
        fastrestart = 0
        lastpeernum = -1
        curpeernum = 20
        reloading = 135457232
        __PRETTY_FUNCTION__ = "do_monitor"
#11 0x00a6d1d5 in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#12 0x007ca2da in clone () from /lib/tls/libc.so.6
No symbol table info available.