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**Do you want to request a *feature* or report a *bug*?**

Bug

**What is the current behavior?**

See fiddle https://jsfiddle.net/j2nzg31L/1/

The warning related to the select fires repeatedly.  @gaearon tells me it should dedupe, and that this is a bug.

**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar (template for React 16: https://jsfiddle.net/Luktwrdm/, template for React 15: https://jsfiddle.net/hmbg7e9w/).**

See above

**What is the expected behavior?**

See above

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**

16.2
/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */
import React from 'react';
import warning from 'fbjs/lib/warning';
function flattenChildren(children) {
  let content = '';
  
  
  
  
  React.Children.forEach(children, function(child) {
    if (child == null) {
      return;
    }
    if (typeof child === 'string' || typeof child === 'number') {
      content += child;
    }
  });
  return content;
}
/**
 * Implements an <option> host component that warns when `selected` is set.
 */
export function validateProps(element: Element, props: Object) {