diff -Naur upower-0.99.5/src/linux/up-backend.c upower-0.99.5-patched/src/linux/up-backend.c
--- upower-0.99.5/src/linux/up-backend.c	2017-03-28 11:14:59.000000000 +0200
+++ upower-0.99.5-patched/src/linux/up-backend.c	2018-07-09 12:20:23.271022413 +0200
@@ -498,7 +498,7 @@
 							NULL,
 							&error);
 	if (out == NULL) {
-		g_warning ("Could not acquire inhibitor lock: %s", error->message);
+		g_warning ("Could not acquire inhibitor lock");
 		return;
 	}