--- jsr166/src/test/tck/ArrayDequeTest.java	2017/08/04 03:30:21	1.56
+++ jsr166/src/test/tck/ArrayDequeTest.java	2018/06/22 00:04:58	1.57
@@ -745,7 +745,7 @@ public class ArrayDequeTest extends JSR1
         ArrayDeque l = new ArrayDeque();
         l.add(new Object());
         try {
-            l.toArray(null);
+            l.toArray((Object[])null);
             shouldThrow();
         } catch (NullPointerException success) {}
     }