**Do you want to request a _feature_ or report a _bug_?**

Report a bug.

**What is the current behavior?**

When testing components, `Warning: ReactComponentTreeDevtool: Missing React element for debugID 1 when building stack` is shown when calling `TestUtils.renderIntoDocument`.

**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: https://jsfiddle.net/reactjs/69z2wepo/).**

https://github.com/angusfretwell/reproduce-debugid-warning (`npm install && npm test`).

**What is the expected behavior?**

According to #7187 this is an internal warning and shouldn't be displayed.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
- react@15.2.1
- react-addons-test-utils@15.2.1
- react-dom@15.2.1

I didn't receive this warning on 15.2.0.

* LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @emails react-core
 */
'use strict';
var React = require('React');
var ReactTestUtils = require('ReactTestUtils');
var reactComponentExpect = require('reactComponentExpect');
/**
 * Counts clicks and has a renders an item for each click. Each item rendered
 * has a ref of the form "clickLogN".
 */
var ClickCounter = React.createClass({
  getInitialState: function() {
    return {count: this.props.initialCount};
  },
  triggerReset: function() {
    this.setState({count: this.props.initialCount});
  },
  handleClick: function() {
    this.setState({count: this.state.count + 1});
  },
  render: function() {
    var children = [];
    var i;
    for (i = 0; i < this.state.count; i++) {
      children.push(
        <div
          className="clickLogDiv"