test/jdk/java/util/concurrent/tck/ConcurrentLinkedDequeTest.java

8234131: Miscellaneous changes imported from jsr166 CVS 2020-12
Reviewed-by: martin

*** 1008,1018 ****
       * Don't return null when the deque is observably never empty.
       * https://bugs.openjdk.java.net/browse/JDK-8189387
       * ant -Djsr166.expensiveTests=true -Djsr166.tckTestClass=ConcurrentLinkedDequeTest -Djsr166.methodFilter=testBug8189387 tck
       */
      public void testBug8189387() {
-         final ThreadLocalRandom rnd = ThreadLocalRandom.current();
          Object x = new Object();
          for (int n = expensiveTests ? 100_000 : 10; n--> 0; ) {
              ConcurrentLinkedDeque<Object> d = new ConcurrentLinkedDeque<>();
              Runnable add = chooseRandomly(
                  () -> d.addFirst(x),
--- 1008,1017 ----