throw new AssertionError("this statement should be unreachable");
    }

    @Override
    BoundType typeAsUpperBound() {
      throw new IllegalStateException();
    }

    @Override
    Cut<Comparable<?>> withLowerBoundType(
        BoundType boundType, DiscreteDomain<Comparable<?>> domain) {
      throw new AssertionError("this statement should be unreachable");
    }

    @Override

 * actions taken by the java garbage collection system:
 *
 * <ul>
 *   <li>invoking the {@code finalize} methods of unreachable objects
 *   <li>clearing weak references to unreachable referents
 *   <li>enqueuing weak references to unreachable referents in their reference queue
 * </ul>
 *
 * <p>This class uses (possibly repeated) invocations of {@link java.lang.System#gc()} to cause

 * actions taken by the java garbage collection system:
 *
 * <ul>
 *   <li>invoking the {@code finalize} methods of unreachable objects
 *   <li>clearing weak references to unreachable referents
 *   <li>enqueuing weak references to unreachable referents in their reference queue
 * </ul>
 *
 * <p>This class uses (possibly repeated) invocations of {@link java.lang.System#gc()} to cause

      rethrow(e);
    }
    throw new AssertionError("Unreachable");
  }

  @Override
  public V get(long timeout, TimeUnit unit)
      throws InterruptedException, ExecutionException, TimeoutException {
    try {
      super.get(timeout, unit);
    } catch (ExecutionException e) {
      rethrow(e);
    }
    throw new AssertionError("Unreachable");
  }

      rethrow(e);
    }
    throw new AssertionError("Unreachable");
  }

  @Override
  public V get(long timeout, TimeUnit unit)
      throws InterruptedException, ExecutionException, TimeoutException {
    try {
      super.get(timeout, unit);
    } catch (ExecutionException e) {
      rethrow(e);
    }
    throw new AssertionError("Unreachable");
  }

      throw new AssertionError("this statement should be unreachable");
    }

    @Override
    BoundType typeAsUpperBound() {
      throw new IllegalStateException();
    }

    @Override
    Cut<Comparable<?>> withLowerBoundType(
        BoundType boundType, DiscreteDomain<Comparable<?>> domain) {
      throw new AssertionError("this statement should be unreachable");
    }

    @Override

    Object x =
        new Object() {
          @Override
          protected void finalize() {
            latch.countDown();
          }
        };
    x = null; // Hint to the JIT that x is unreachable
    GcFinalization.await(latch);
    assertEquals(0, latch.getCount());
  }

  public void testAwaitDone_Future() {
    final SettableFuture<@Nullable Void> future = SettableFuture.create();
    Object x =

    Object x =
        new Object() {
          @Override
          protected void finalize() {
            latch.countDown();
          }
        };
    x = null; // Hint to the JIT that x is unreachable
    GcFinalization.await(latch);
    assertEquals(0, latch.getCount());
  }

  public void testAwaitDone_Future() {
    final SettableFuture<@Nullable Void> future = SettableFuture.create();
    Object x =

    assertSame(canonical, pool.intern(canonical));

    WeakReference<Integer> signal = new WeakReference<>(canonical);
    canonical = null; // Hint to the JIT that canonical is unreachable

    GcFinalization.awaitClear(signal);
    assertSame(not, pool.intern(not));
  }

  public void testAsFunction_simplistic() {
    String canonical = "a";
    String not = new String("a");

            } else {
              haveBeenCalled = true;
              sneakyThrow(new SomeCheckedException());
              throw new AssertionError(); // unreachable
            }
          }
        };

    // The first time, the sneakily-thrown exception comes out
    try {
      iter.hasNext();
      fail("No exception thrown");
    } catch (Exception e) {