--- old/src/java.base/share/classes/java/util/Arrays.java	2017-12-07 14:44:04.000000000 -0800
+++ new/src/java.base/share/classes/java/util/Arrays.java	2017-12-07 14:44:04.000000000 -0800
@@ -4346,6 +4346,13 @@
         }
 
         @Override
+        public <T> T[] toArray(IntFunction<T[]> generator) {
+            T[] r = generator.apply(a.length);
+            System.arraycopy(a, 0, r, 0, a.length);
+            return r;
+        }
+
+        @Override
         public E get(int index) {
             return a[index];
         }