Index: trunk/src/org/openstreetmap/josm/gui/dialogs/relation/GenericRelationEditor.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/dialogs/relation/GenericRelationEditor.java	(revision 1854)
+++ trunk/src/org/openstreetmap/josm/gui/dialogs/relation/GenericRelationEditor.java	(revision 1855)
@@ -726,5 +726,5 @@
             while(it.hasNext()) {
                 OsmPrimitive primitive = it.next();
-                if (primitive instanceof Relation && getRelation().equals(primitive)) {
+                if (primitive instanceof Relation && getRelation() != null && getRelation().equals(primitive)) {
                     warnOfCircularReferences(primitive);
                     continue;