diff -r 945817561b9a -r 40f95fe90cdc javap/src/main/java/sun/tools/javap/Vector.java
--- a/javap/src/main/java/sun/tools/javap/Vector.java	Sat Nov 10 20:31:39 2012 +0100
+++ b/javap/src/main/java/sun/tools/javap/Vector.java	Sun Nov 11 13:23:52 2012 +0100
@@ -22,8 +22,9 @@
         addElement(objectType);
     }
     void addElement(Object obj) {
-        setSize(size() + 1);
-        setElementAt(obj, size());
+        final int s = size();
+        setSize(s + 1);
+        setElementAt(obj, s);
     }
 
     int size() {