#0  0x00007fce16a1f4bf in ?? () from /tmp/apport_sandbox_qxC8y5/usr/lib/x86_64-linux-gnu/libcups.so.2
#1  0x000055b3707d9803 in process_new_notifications (user_data=0x55b372629070) at gsd-print-notifications-manager.c:916
  911:         gint                           notify_sequence_number = -1;
  912:         gint                           i;
  913: 
  914:         request = ippNewRequest (IPP_GET_NOTIFICATIONS);
  915: 
  916:         ippAddString (request, IPP_TAG_OPERATION, IPP_TAG_NAME,
  917:                       "requesting-user-name", NULL, cupsUser ());
  918: 
  919:         ippAddInteger (request, IPP_TAG_OPERATION, IPP_TAG_INTEGER,
  920:                        "notify-subscription-ids", manager->priv->subscription_id);
  921: 
#2  0x00007fce164df864 in emit_signal_instance_in_idle_cb (data=0x7fce0001b4e0) at ../../../../gio/gdbusconnection.c:3720
  [Error: gdbusconnection.c was not found in source tree]
#3  0x00007fce15f09e25 in g_main_dispatch (context=0x55b3726279d0) at ../../../../glib/gmain.c:3148
  [Error: gmain.c was not found in source tree]
#4  g_main_context_dispatch (context=context@entry=0x55b3726279d0) at ../../../../glib/gmain.c:3813
  [Error: gmain.c was not found in source tree]
#5  0x00007fce15f0a1f0 in g_main_context_iterate (context=0x55b3726279d0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../../glib/gmain.c:3886
  [Error: gmain.c was not found in source tree]
#6  0x00007fce15f0a502 in g_main_loop_run (loop=0x55b37260aa70) at ../../../../glib/gmain.c:4082
  [Error: gmain.c was not found in source tree]
#7  0x000055b3707d7905 in main (argc=<optimized out>, argv=<optimized out>) at ../../plugins/common/daemon-skeleton.h:209
  204: 			g_error_free (error);
  205: 			exit (1);
  206: 		}
  207: 	}
  208: 
  209:         g_main_loop_run (loop);
  210: 
  211: 	if (should_run ())
  212: 		STOP (manager);
  213:         g_object_unref (manager);
  214: