Index: trunk/src/org/openstreetmap/josm/data/validation/tests/Lanes.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/Lanes.java	(revision 6832)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/Lanes.java	(revision 6834)
@@ -64,4 +64,5 @@
     protected void checkNumberOfLanes(final OsmPrimitive p) {
         final String lanes = p.get("lanes");
+        if (lanes == null) return;
         final String forward = Utils.firstNonNull(p.get("lanes:forward"), "0");
         final String backward = Utils.firstNonNull(p.get("lanes:backward"), "0");