--- a/jdk/src/share/classes/java/util/Collections.java	Wed Jul 30 15:28:09 2014 +0800
+++ b/jdk/src/share/classes/java/util/Collections.java	Wed Jul 30 17:42:18 2014 +0100
@@ -3486,6 +3486,7 @@
          */
         @Override
         public void replaceAll(UnaryOperator<E> operator) {
+            Objects.requireNonNull(operator);
             list.replaceAll(e -> typeCheck(operator.apply(e)));
         }