Index: /applications/editors/josm/plugins/validator/src/org/openstreetmap/josm/plugins/validator/tests/WronglyOrderedWays.java
===================================================================
--- /applications/editors/josm/plugins/validator/src/org/openstreetmap/josm/plugins/validator/tests/WronglyOrderedWays.java	(revision 18555)
+++ /applications/editors/josm/plugins/validator/src/org/openstreetmap/josm/plugins/validator/tests/WronglyOrderedWays.java	(revision 18556)
@@ -58,4 +58,6 @@
         if( !w.isUsable() )
             return;
+        if (w.getNodesCount() <= 0)
+            return;
 
         String natural = w.get("natural");