(gdb) bt full
#0  realtime_peer (peername=Variable "peername" is not available.
) at chan_iax2.c:2240
        var = (struct ast_variable *) 0x8116748
        tmp = Variable "tmp" is not available.
(gdb) bt
#0  realtime_peer (peername=Variable "peername" is not available.
) at chan_iax2.c:2240
#1  0x40be3621 in register_verify (callno=Variable "callno" is not available.
) at chan_iax2.c:680
#2  0x40be9201 in socket_read (id=0x813b370, fd=10, events=1, cbdata=0x0)
    at chan_iax2.c:6553
#3  0x0805361c in ast_io_wait (ioc=0x8139e10, howlong=1641) at io.c:267
#4  0x40bddf61 in network_thread (ignore=0x0) at chan_iax2.c:7130
#5  0x400269dd in start_thread () from /lib/tls/libpthread.so.0
#6  0x40192ffa in clone () from /lib/tls/libc.so.6
(gdb)