diff -r 398911a8f401 -r b9386cc3ff7b rt/vm/src/main/java/org/apidesign/vm4brwsr/StringArray.java
--- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/StringArray.java	Sat Feb 15 17:23:24 2014 +0100
+++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/StringArray.java	Sat Feb 15 20:18:26 2014 +0100
@@ -105,7 +105,7 @@
     }
 
     int indexOf(String ic) {
-        for (int i = 0; i < arr.length; i++) {
+        if (arr != null) for (int i = 0; i < arr.length; i++) {
             if (ic.equals(arr[i])) {
                 return i;
             }