#0  0x00007fcb058150bc in backend_died (monitor=0x7fcafc003d90, old_backend=<optimized out>) at gvfsmonitor.c:77
  72: {
  73:   Subscriber *subscriber;
  74:   
  75:   monitor->priv->backend = NULL;
  76: 
  77:   while (monitor->priv->subscribers != NULL)
  78:     {
  79:       subscriber = monitor->priv->subscribers->data;
  80:       unsubscribe (subscriber);
  81:     }
  82: }
#1  0x00007fcb04e1f7d2 in weak_refs_notify (data=0x7fcaf401f650) at /build/buildd/glib2.0-2.35.9/./gobject/gobject.c:2470
  [Error: /build/buildd/glib2.0-2.35.9/./gobject/gobject.c was not found in source tree]
#2  0x00007fcb04e20744 in g_object_unref (_object=0x7fcafc006620) at /build/buildd/glib2.0-2.35.9/./gobject/gobject.c:2987
  [Error: /build/buildd/glib2.0-2.35.9/./gobject/gobject.c was not found in source tree]
#3  0x00007fcb04e407a3 in g_value_unset (value=value@entry=0x7fffedbb0980) at /build/buildd/glib2.0-2.35.9/./gobject/gvalue.c:274
  [Error: /build/buildd/glib2.0-2.35.9/./gobject/gvalue.c was not found in source tree]
#4  0x00007fcb04e35ec9 in g_signal_emit_valist (instance=0x7fcafc006620, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffedbb0bc8) at /build/buildd/glib2.0-2.35.9/./gobject/gsignal.c:3358
  [Error: /build/buildd/glib2.0-2.35.9/./gobject/gsignal.c was not found in source tree]
#5  0x00007fcb04e36112 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.35.9/./gobject/gsignal.c:3384
  [Error: /build/buildd/glib2.0-2.35.9/./gobject/gsignal.c was not found in source tree]
#6  0x00007fcb0581625f in g_vfs_job_source_closed (job_source=<optimized out>) at gvfsjobsource.c:106
  101: }
  102: 
  103: void
  104: g_vfs_job_source_closed (GVfsJobSource *job_source)
  105: {
  106:   g_signal_emit (job_source, signals[CLOSED], 0);
  107: }
#7  0x00007fcb0581746c in unregister_mount_callback (proxy=<optimized out>, res=<optimized out>, user_data=user_data@entry=0x7fcaf0003b60) at gvfsjobunmount.c:297
  292:   backend = op_job->backend;
  293:   (*G_VFS_JOB_CLASS (g_vfs_job_unmount_parent_class)->send_reply) (G_VFS_JOB (op_job));
  294: 
  295:   /* Unlink job source from daemon */
  296:   daemon = g_vfs_backend_get_daemon (backend);
  297:   g_vfs_job_source_closed (G_VFS_JOB_SOURCE (backend));
  298: 
  299:   g_vfs_daemon_close_active_channels (daemon);
  300: }
  301: 
  302: /* Might be called on an i/o thread */
#8  0x00007fcb052da72e in g_simple_async_result_complete (simple=0x7fcaf001ee70) at /build/buildd/glib2.0-2.35.9/./gio/gsimpleasyncresult.c:777
  [Error: /build/buildd/glib2.0-2.35.9/./gio/gsimpleasyncresult.c was not found in source tree]
#9  0x00007fcb0533a723 in reply_cb (connection=<optimized out>, res=0x7fcaf001f1c0, user_data=user_data@entry=0x7fcaf001ee70) at /build/buildd/glib2.0-2.35.9/./gio/gdbusproxy.c:2632
  [Error: /build/buildd/glib2.0-2.35.9/./gio/gdbusproxy.c was not found in source tree]
#10 0x00007fcb052da72e in g_simple_async_result_complete (simple=0x7fcaf001f1c0) at /build/buildd/glib2.0-2.35.9/./gio/gsimpleasyncresult.c:777
  [Error: /build/buildd/glib2.0-2.35.9/./gio/gsimpleasyncresult.c was not found in source tree]
#11 0x00007fcb053309ea in g_dbus_connection_call_done (source=0x85d130, result=<optimized out>, user_data=user_data@entry=0x7fcaf003ee10) at /build/buildd/glib2.0-2.35.9/./gio/gdbusconnection.c:5339
  [Error: /build/buildd/glib2.0-2.35.9/./gio/gdbusconnection.c was not found in source tree]
#12 0x00007fcb052da72e in g_simple_async_result_complete (simple=0x7fcaf001ec40) at /build/buildd/glib2.0-2.35.9/./gio/gsimpleasyncresult.c:777
  [Error: /build/buildd/glib2.0-2.35.9/./gio/gsimpleasyncresult.c was not found in source tree]
#13 0x00007fcb052da85c in complete_in_idle_cb (data=0x7fcaf001ec40) at /build/buildd/glib2.0-2.35.9/./gio/gsimpleasyncresult.c:789
  [Error: /build/buildd/glib2.0-2.35.9/./gio/gsimpleasyncresult.c was not found in source tree]
#14 0x00007fcb04b57fe5 in g_main_dispatch (context=0x85e2d0) at /build/buildd/glib2.0-2.35.9/./glib/gmain.c:3054
  [Error: /build/buildd/glib2.0-2.35.9/./glib/gmain.c was not found in source tree]
#15 g_main_context_dispatch (context=context@entry=0x85e2d0) at /build/buildd/glib2.0-2.35.9/./glib/gmain.c:3630
  [Error: /build/buildd/glib2.0-2.35.9/./glib/gmain.c was not found in source tree]
#16 0x00007fcb04b58328 in g_main_context_iterate (context=0x85e2d0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.35.9/./glib/gmain.c:3701
  [Error: /build/buildd/glib2.0-2.35.9/./glib/gmain.c was not found in source tree]
#17 0x00007fcb04b5879a in g_main_loop_run (loop=0x866e40) at /build/buildd/glib2.0-2.35.9/./glib/gmain.c:3895
  [Error: /build/buildd/glib2.0-2.35.9/./glib/gmain.c was not found in source tree]
#18 0x00000000004078c1 in daemon_main (argc=argc@entry=4, argv=argv@entry=0x7fffedbb1058, max_job_threads=max_job_threads@entry=-1, default_type=default_type@entry=0x407a0f "mtp", mountable_name=mountable_name@entry=0x0, first_type_name=first_type_name@entry=0x407a0f "mtp") at daemon-main.c:395
  390:   else
  391:     {
  392:       g_idle_add (do_name_acquired, data);
  393:     }
  394:   
  395:   g_main_loop_run (loop);
  396:   
  397:   g_clear_object (&data->daemon);
  398:   g_free (data->mountable_name);
  399:   g_free (data);
  400:   if (name_owner_id != 0)
#19 0x0000000000404008 in main (argc=4, argv=0x7fffedbb1058) at daemon-main-generic.c:42
  37: #ifdef BACKEND_SETUP_FUNC
  38:   BACKEND_SETUP_FUNC ();
  39: #else
  40:   daemon_setup ();
  41: #endif
  42:   daemon_main (argc, argv,
  43: #ifdef MAX_JOB_THREADS
  44: 	       MAX_JOB_THREADS,
  45: #else
  46: 	       -1, 
  47: #endif