diff -r d382dacfd73f -r 24096bd2b38a rt/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/lang/System.java
--- a/rt/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/lang/System.java	Tue Feb 26 16:54:16 2013 +0100
+++ b/rt/emul/mini/src/main/java/org/apidesign/bck2brwsr/emul/lang/System.java	Sun Mar 10 21:28:50 2013 +0100
@@ -54,6 +54,11 @@
     )
     public static native byte[] expandArray(byte[] arr, int expectedSize);
 
+    @JavaScriptBody(args = { "arr", "expectedSize" }, body = 
+        "while (expectedSize-- > arr.length) { arr.push(0); }; return arr;"
+    )
+    public static native char[] expandArray(char[] arr, int expectedSize);
+
     @JavaScriptBody(args = {}, body = "return new Date().getTime();")
     private static native double currentTimeMillisDouble();