--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeJSON.java	Fri Feb 27 14:33:47 2015 +0100
+++ b/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeJSON.java	Mon Mar 02 14:33:55 2015 +0100
@@ -181,7 +181,7 @@
                 }
                 gap = sb.toString();
             }
-        } else if (modSpace instanceof String || modSpace instanceof ConsString) {
+        } else if (JSType.isString(modSpace)) {
             final String str = modSpace.toString();
             gap = str.substring(0, Math.min(10, str.length()));
         } else {