(gdb) bt
#0  0x00be27a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1  0x00c277a5 in raise () from /lib/tls/libc.so.6
#2  0x00c29209 in abort () from /lib/tls/libc.so.6
#3  0x00c5b71a in __libc_message () from /lib/tls/libc.so.6
#4  0x00c61fbf in _int_free () from /lib/tls/libc.so.6
#5  0x00c6233a in free () from /lib/tls/libc.so.6
#6  0x08059798 in ast_frfree (fr=0xd26ff4) at frame.c:285
#7  0x08069a88 in ast_channel_bridge (c0=0x9db0850, c1=0x9ce97f0, config=0x78d98320, fo=0x78d97600, rc=0x78d97604) at channel.c:3567
#8  0x009c4d15 in ast_bridge_call (chan=0x9db0850, peer=0x9ce97f0, config=0x78d98320) at res_features.c:1325
#9  0x008e7dd2 in dial_exec_full (chan=0x9db0850, data=Variable "data" is not available.
) at app_dial.c:1608
#10 0x008ea7ad in dial_exec (chan=0x0, data=0x6) at app_dial.c:1650
#11 0x0809242d in pbx_extension_helper (c=0x9db0850, con=Variable "con" is not available.
) at pbx.c:553
#12 0x080936f6 in __ast_pbx_run (c=0x9db0850) at pbx.c:2230
#13 0x0809526c in pbx_thread (data=0x0) at pbx.c:2517
#14 0x00dee371 in start_thread () from /lib/tls/libpthread.so.0
#15 0x00cc7ffe in clone () from /lib/tls/libc.so.6