#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7988101 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xb79898e8 in *__GI_abort () at abort.c:88
#3  0xb7ac515a in IA__g_logv (log_domain=0xb7b7993c "GLib-GObject", log_level=G_LOG_LEVEL_WARNING, 
    format=0xb7b7f284 "invalid uninstantiatable type `%s' in cast to `%s'", args1=0xbff3ae6c "")
    at gmessages.c:497
#4  0xb7ac518b in IA__g_log (log_domain=0xb7b7993c "GLib-GObject", log_level=G_LOG_LEVEL_WARNING, 
    format=0xb7b7f284 "invalid uninstantiatable type `%s' in cast to `%s'") at gmessages.c:517
#5  0xb7b70330 in IA__g_type_check_instance_cast (type_instance=0x80781d0, iface_type=135434472)
    at gtype.c:3160
#6  0x08057906 in invalidated_cb (proxy=0x8130ec0, domain=1701, code=1, 
    message=0x81577b0 "Proxy unreferenced", user_data=0x80781d0) at stream.c:1675
#7  0xb7c41a27 in _tp_marshal_VOID__UINT_INT_STRING (closure=0x815dea8, return_value=0x0, 
    n_param_values=4, param_values=0xbff3b0ec, invocation_hint=0xbff3affc, marshal_data=0x80578e0)
    at _gen/signals-marshal.c:1075
#8  0xb7b54722 in IA__g_closure_invoke (closure=0x815dea8, return_value=0x0, n_param_values=4, 
    param_values=0xbff3b0ec, invocation_hint=0xbff3affc) at gclosure.c:490
#9  0xb7b64415 in signal_emit_unlocked_R (node=0x8079aa8, detail=0, instance=0x8130ec0, 
    emission_return=0x0, instance_and_params=0xbff3b0ec) at gsignal.c:2440
#10 0xb7b6586c in IA__g_signal_emit_valist (instance=0x8130ec0, signal_id=30, detail=0, 
    var_args=0xbff3b338 "") at gsignal.c:2199
#11 0xb7b65a2a in IA__g_signal_emit (instance=0x8130ec0, signal_id=30, detail=0) at gsignal.c:2243
#12 0xb7c3b403 in tp_proxy_emit_invalidated (p=0x8130ec0) at proxy.c:476
#13 0xb7c3b481 in tp_proxy_invalidate (self=0x8130ec0, error=0xbff3b380) at proxy.c:510
#14 0xb7c3bea5 in tp_proxy_dispose (object=0x8130ec0) at proxy.c:1612
#15 0xb7b566e5 in IA__g_object_unref (_object=0x8130ec0) at gobject.c:1765
#16 0xb7c3aa35 in tp_proxy_signal_invocation_run (p=0x86712a0) at proxy.c:1232
#17 0xb7abb045 in g_idle_dispatch (source=0x8476dd8, callback=0x6, user_data=0x86712a0) at gmain.c:4132
#18 0xb7abca45 in IA__g_main_context_dispatch (context=0x8077d28) at gmain.c:2061
---Type <return> to continue, or q <return> to quit---
#19 0xb7abfcb9 in g_main_context_iterate (context=0x8077d28, block=1, dispatch=1, self=0x8062008)
    at gmain.c:2694
#20 0xb7abffee in IA__g_main_loop_run (loop=0x80772a0) at gmain.c:2898
#21 0x0804e7ae in main (argc=1918989427, argv=0x646574) at stream-engine-main.c:275