// |reftest| skip-if(!this.hasOwnProperty('AsyncIterator')) 

class TestError extends Error {}
class TestIterator extends AsyncIterator {
  next() {
    return Promise.resolve({
      done: false,
      get value() {
        throw new TestError();
      }
    });
  }

  closed = false;
  return() {
    closed = true;
  }
}

const iterator = new TestIterator();
assertEq(iterator.closed, false, 'iterator starts unclosed');
iterator.toArray().then(
  () => {
    throw new Error('toArray should have thrown');
  },
  err => {
    assertEq(err instanceof TestError, true);
    assertEq(iterator.closed, false, 'iterator remains unclosed');
  }
);

if (typeof reportCompare === 'function')
  reportCompare(0, 0);