Index: trunk/src/org/openstreetmap/josm/data/validation/tests/RelationChecker.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/RelationChecker.java	(revision 6061)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/RelationChecker.java	(revision 6062)
@@ -230,5 +230,6 @@
     @Override
     public boolean isFixable(TestError testError) {
-        return testError.getCode() == RELATION_EMPTY && testError.getPrimitives().iterator().next().isNew();
+        Collection<? extends OsmPrimitive> primitives = testError.getPrimitives();
+        return testError.getCode() == RELATION_EMPTY && !primitives.isEmpty() && primitives.iterator().next().isNew();
     }
 }