if (super.cancel(interruptIfRunning)) {
        /*
         * requireNonNull is generally safe: If cancel succeeded, then this Future was still
         * pending, so its `state` field hasn't been nulled out yet.
         *
         * OK, it's technically possible for this to fail in the presence of unsafe publishing, as
         * discussed in the comments in TimeoutFuture. TODO(cpovirk): Maybe check for null before

   * Test the case where the futures are fulfilled prior to constructing the ListFuture. There was a
   * bug where the loop that connects a Listener to each of the futures would die on the last
   * loop-check as done() on ListFuture nulled out the variable being looped over (the list of
   * futures).
   */
  public void testAllAsList_doneFutures() throws Exception {
    // Create input and output

   * Test the case where the futures are fulfilled prior to constructing the ListFuture. There was a
   * bug where the loop that connects a Listener to each of the futures would die on the last
   * loop-check as done() on ListFuture nulled out the variable being looped over (the list of
   * futures).
   */
  public void testAllAsList_doneFutures() throws Exception {
    // Create input and output

drbg.Generate(b[:size], additionalInput); reseedRequired { // See SP 800-90A Rev. 1, Section 9.3.1, Steps 6-8, as explained in // Section 9.3.2: if Generate reports a reseed is required, the // additional input is passed to Reseed along with the entropy and // then nulled before the next Generate call. drbg.Reseed(getEntropy(), additionalInput) additionalInput = nil continue } b = b[size:] } } var testingReader io.Reader // SetTestingReader sets a global, deterministic cryptographic randomness source // for testing...

drbg.Generate(b[:size], additionalInput); reseedRequired { // See SP 800-90A Rev. 1, Section 9.3.1, Steps 6-8, as explained in // Section 9.3.2: if Generate reports a reseed is required, the // additional input is passed to Reseed along with the entropy and // then nulled before the next Generate call. entropy.Depleted(func(seed *[48]byte) { drbg.Reseed(seed, additionalInput) }) additionalInput = nil continue } b = b[size:] } } // DefaultReader is a sentinel type, embedded in the default // [crypto/rand.Reader], used...