--- old/src/share/classes/java/util/function/DoubleBlock.java	2012-11-26 17:53:00.619299944 -0800
+++ new/src/share/classes/java/util/function/DoubleBlock.java	2012-11-26 17:53:00.411299933 -0800
@@ -33,7 +33,10 @@
  *
  * @since 1.8
  */
-public interface DoubleBlock {
+public interface DoubleBlock extends Block<Double> {
+
+    @Override
+    public default void accept(Double t) { accept((double) t); }
 
     /**
      * Use the {@code double} input value in an operation which may modify