We purge it [here](https://github.com/facebook/react/blob/b11540ccb2321aeb7259fcf0b3a38aeeea35231d/src/isomorphic/ReactDebugTool.js#L88-L89) but this code doesn’t run because of the [early exit](https://github.com/facebook/react/blob/b11540ccb2321aeb7259fcf0b3a38aeeea35231d/src/isomorphic/ReactDebugTool.js#L53-L57).

Need to fix this and add a test case to make sure we don’t regress on it.

/**
 * Copyright 2016-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * 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.
 *
 * @providesModule ReactComponentTreeDevtool
 */
'use strict';
var invariant = require('invariant');
var tree = {};
var rootIDs = [];
function updateTree(id, update) {
  if (!tree[id]) {
    tree[id] = {
      parentID: null,
      ownerID: null,
      text: null,
      childIDs: [],
      displayName: 'Unknown',
      isMounted: false,
      updateCount: 0,
    };
  }
  update(tree[id]);
}
function purgeDeep(id) {