--- old/test/jdk/java/util/concurrent/tck/ArrayDequeTest.java	2017-12-07 14:44:10.000000000 -0800
+++ new/test/jdk/java/util/concurrent/tck/ArrayDequeTest.java	2017-12-07 14:44:10.000000000 -0800
@@ -772,7 +772,7 @@
         ArrayDeque l = new ArrayDeque();
         l.add(new Object());
         try {
-            l.toArray(null);
+            l.toArray((Object[])null);
             shouldThrow();
         } catch (NullPointerException success) {}
     }