I was testing latest refactor of PerfTools.
When using printOperations() often (but not always) I get 

```
Uncaught TypeError: Cannot read property 'displayName' of undefined
```

in getOperations() on the line:

```
var {displayName, ownerID} = treeSnapshot[instanceID];
```

/**
 * Copyright 2013-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 instantiateReactComponent
 */
'use strict';
var ReactCompositeComponent = require('ReactCompositeComponent');
var ReactEmptyComponent = require('ReactEmptyComponent');
var ReactNativeComponent = require('ReactNativeComponent');
var ReactInstrumentation = require('ReactInstrumentation');
var invariant = require('invariant');
var warning = require('warning');
var ReactCompositeComponentWrapper = function(element) {
  this.construct(element);
};
Object.assign(
  ReactCompositeComponentWrapper.prototype,
  ReactCompositeComponent.Mixin,
  {
    _instantiateReactComponent: instantiateReactComponent,
  }
);
function getDeclarationErrorAddendum(owner) {