--- jsr166/src/test/tck/Collection8Test.java	2016/10/31 20:08:40	1.7
+++ jsr166/src/test/tck/Collection8Test.java	2016/11/03 16:53:13	1.9
@@ -81,6 +81,8 @@ public class Collection8Test extends JSR
         c.iterator().forEachRemaining(alwaysThrows);
         c.spliterator().forEachRemaining(alwaysThrows);
         assertFalse(c.spliterator().tryAdvance(alwaysThrows));
+        if (c.spliterator().hasCharacteristics(Spliterator.SIZED))
+            assertEquals(0, c.spliterator().estimateSize());
         if (Queue.class.isAssignableFrom(impl.klazz())) {
             Queue q = (Queue) c;
             assertNull(q.peek());
@@ -93,6 +95,7 @@ public class Collection8Test extends JSR
             assertNull(d.pollFirst());
             assertNull(d.pollLast());
             assertIteratorExhausted(d.descendingIterator());
+            d.descendingIterator().forEachRemaining(alwaysThrows);
         }
     }
 
@@ -182,6 +185,7 @@ public class Collection8Test extends JSR
             }
         };
         try {
+            assertFalse(survivors.contains(null));
             try {
                 boolean modified = c.removeIf(randomPredicate);
                 if (!modified) {
@@ -203,7 +207,7 @@ public class Collection8Test extends JSR
             System.err.printf("n=%d%n", n);
             System.err.printf("accepts=%s%n", accepts);
             System.err.printf("rejects=%s%n", rejects);
-            System.err.println(survivors);
+            System.err.printf("survivors=%s%n", survivors);
             System.err.printf("threw=%s%n", threwAt.get());
             throw ex;
         }