Index: trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/ConditionFactory.java
===================================================================
--- trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/ConditionFactory.java	(revision 13045)
+++ trunk/src/org/openstreetmap/josm/gui/mappaint/mapcss/ConditionFactory.java	(revision 13046)
@@ -769,6 +769,7 @@
 
         static boolean selected(Environment e) { // NO_UCD (unused code)
-            Cascade c = e.mc.getCascade(e.layer);
-            c.setDefaultSelectedHandling(false);
+            if (e.mc != null) {
+                e.mc.getCascade(e.layer).setDefaultSelectedHandling(false);
+            }
             return e.osm.isSelected();
         }