--- old/test/jdk/java/util/concurrent/tck/SynchronousQueueTest.java	2021-01-05 09:12:32.536517424 -0800
+++ new/test/jdk/java/util/concurrent/tck/SynchronousQueueTest.java	2021-01-05 09:12:32.040521314 -0800
@@ -464,7 +464,7 @@
     public void testToArray_null(boolean fair) {
         final SynchronousQueue q = new SynchronousQueue(fair);
         try {
-            Object[] o = q.toArray((Object[])null);
+            Object[] unused = q.toArray((Object[])null);
             shouldThrow();
         } catch (NullPointerException success) {}
     }