diff -r 804f6f982f4e -r 44015f05c91b rt/emul/mini/src/main/java/java/lang/String.java
--- a/rt/emul/mini/src/main/java/java/lang/String.java	Thu Oct 03 15:51:55 2013 +0200
+++ b/rt/emul/mini/src/main/java/java/lang/String.java	Fri Oct 04 15:01:04 2013 +0200
@@ -985,12 +985,12 @@
                 continue;
             }
             if (v < 0x0800) {
-                arr = System.expandArray(arr, i + 1);
+                arr = System.expandArray(arr, arr.length + 1);
                 arr[i++] = (byte) (0xC0 | (v >> 6));
                 arr[i++] = (byte) (0x80 | (0x3F & v));
                 continue;
             }
-            arr = System.expandArray(arr, i + 2);
+            arr = System.expandArray(arr, arr.length + 2);
             arr[i++] = (byte) (0xE0 | (v >> 12));
             arr[i++] = (byte) (0x80 | ((v >> 6) & 0x7F));
             arr[i++] = (byte) (0x80 | (0x3F & v));