#0  g_source_get_context (source=source@entry=0xa0c0000000000000) at ../../../glib/gmain.c:1481
  [Error: gmain.c was not found in source tree]
#1  0x00007fcea31facc1 in g_task_return (type=<optimized out>, task=0x55ba93253a70) at ../../../gio/gtask.c:1278
  [Error: gtask.c was not found in source tree]
#2  g_task_return (task=0x55ba93253a70, type=<optimized out>) at ../../../gio/gtask.c:1249
  [Error: gtask.c was not found in source tree]
#3  0x00007fcea31fc8df in g_task_return_error (task=<optimized out>, error=<optimized out>) at ../../../gio/gtask.c:1889
  [Error: gtask.c was not found in source tree]
#4  0x00007fcea01ca084 in fp_device_task_return_in_idle_cb (user_data=0x55ba9326a220) at /usr/include/glib-2.0/glib/gmem.h:213
  [Error: gmem.h was not found in source tree]
#5  0x00007fcea3376c04 in g_main_dispatch (context=0x55ba93247ae0) at ../../../glib/gmain.c:3413
  [Error: gmain.c was not found in source tree]
#6  g_main_context_dispatch (context=0x55ba93247ae0) at ../../../glib/gmain.c:4131
  [Error: gmain.c was not found in source tree]
#7  0x00007fcea33cb498 in g_main_context_iterate.constprop.0 (context=context@entry=0x55ba93247ae0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:4207
  [Error: gmain.c was not found in source tree]
#8  0x00007fcea33743b3 in g_main_context_iteration (context=0x55ba93247ae0, context@entry=0x0, may_block=1) at ../../../glib/gmain.c:4272
  [Error: gmain.c was not found in source tree]
#9  0x00007fcea0193247 in fp_context_enumerate (context=0x55ba93252970) at ../libfprint/fp-context.c:591
  [Error: fp-context.c was not found in source tree]
#10 0x000055ba9285e945 in fprint_manager_constructed (object=0x55ba932494a0) at ../src/manager.c:512
  507:                            G_CONNECT_SWAPPED);
  508: 
  509:   /* Prepare everything by enumerating all devices.
  510:    * This blocks the main loop until the existing devices are enumerated
  511:    */
  512:   fp_context_enumerate (priv->context);
  513: 
  514:   G_OBJECT_CLASS (fprint_manager_parent_class)->constructed (object);
  515: }
  516: 
  517: static void
#11 0x00007fcea310e09f in g_object_new_internal (class=class@entry=0x55ba93255160, params=params@entry=0x7ffda46620a0, n_params=n_params@entry=1) at ../../../gobject/gobject.c:2053
  [Error: gobject.c was not found in source tree]
#12 0x00007fcea310f7b8 in g_object_new_valist (object_type=94259820957104, first_property_name=first_property_name@entry=0x55ba92865342 "connection", var_args=var_args@entry=0x7ffda4662370) at ../../../gobject/gobject.c:2355
  [Error: gobject.c was not found in source tree]
#13 0x00007fcea310fced in g_object_new (object_type=<optimized out>, first_property_name=first_property_name@entry=0x55ba92865342 "connection") at ../../../gobject/gobject.c:1824
  [Error: gobject.c was not found in source tree]
#14 0x000055ba92859b64 in fprint_manager_new (no_timeout=0, connection=0x55ba93248040) at ../src/manager.c:528
  523: fprint_manager_new (GDBusConnection *connection, gboolean no_timeout)
  524: {
  525:   FprintManagerPrivate *priv;
  526:   GObject *object;
  527: 
  528:   object = g_object_new (FPRINT_TYPE_MANAGER, "connection", connection, NULL);
  529:   priv = fprint_manager_get_instance_private (FPRINT_MANAGER (object));
  530:   priv->no_timeout = no_timeout;
  531: 
  532:   if (!priv->no_timeout)
  533:     priv->timeout_id = g_timeout_add_seconds (TIMEOUT, (GSourceFunc) fprint_manager_timeout_cb, object);
#15 main (argc=<optimized out>, argv=<optimized out>) at ../src/main.c:204
  199: 
  200:   g_debug ("Launching FprintObject");
  201: 
  202:   /* create the one instance of the Manager object to be shared between
  203:    * all fprintd users. This blocks until all the devices are enumerated */
  204:   manager = fprint_manager_new (connection, no_timeout);
  205: 
  206:   /* Obtain the well-known name after the manager has been initialized.
  207:    * Otherwise a client immediately enumerating the devices will not see
  208:    * any. */
  209:   request_name_ret = g_bus_own_name_on_connection (connection,