#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb74e13d0 in raise () from /lib/i686/cmov/libc.so.6
#2  0xb74e4a85 in abort () from /lib/i686/cmov/libc.so.6
#3  0xb751a2ed in ?? () from /lib/i686/cmov/libc.so.6
#4  0xb75248f4 in ?? () from /lib/i686/cmov/libc.so.6
#5  0xb7526896 in free () from /lib/i686/cmov/libc.so.6
#6  0x08086176 in internal_ao2_ref (user_data=0xb708f5d8, delta=-1) at astobj2.c:274
#7  0x0808606c in __ao2_ref (user_data=0xb708f5d8, delta=-1) at astobj2.c:232
#8  0xb692067c in handle_cli_moh_show_classes (e=0xb6922408, cmd=-4, a=0xaf6c2d04)
    at res_musiconhold.c:1822
#9  0x080c918a in ast_cli_command_full (uid=0, gid=0, fd=41,
    s=0xaf6c2ea4 "moh show classes") at cli.c:2570
#10 0x080c929f in ast_cli_command_multiple_full (uid=0, gid=0, fd=41, size=17,
    s=0xaf6c30f8 "moh show classes") at cli.c:2593
#11 0x0807d8ad in netconsole (vconsole=0x8221bc0) at asterisk.c:1269
#12 0x0818b6ba in dummy_start (data=0x82c3a40) at utils.c:973
#13 0xb73664b5 in start_thread () from /lib/i686/cmov/libpthread.so.0
#14 0xb7597a5e in clone () from /lib/i686/cmov/libc.so.6