--- src/os-patches/plugins/housekeeping/gsd-disk-space.c~	2018-09-29 16:07:04.972842146 +0900
+++ src/os-patches/plugins/housekeeping/gsd-disk-space.c	2018-09-29 16:09:47.679514729 +0900
@@ -1017,7 +1017,9 @@
         g_clear_object (&ldsm_monitor);
         g_clear_object (&settings);
         g_clear_object (&privacy_settings);
-        g_clear_pointer (&notification, notify_notification_close);
+        /* NotifyNotification::closed callback will drop reference */
+        if (notification != NULL)
+                notify_notification_close (notification, NULL);
         g_slist_free_full (ignore_paths, g_free);
         ignore_paths = NULL;
 }