Hello,

After updating to React 15.0.1, we are getting the following error:

```
Uncaught TypeError: Cannot read property 'addEventListener' of null
```

![image](https://cloud.githubusercontent.com/assets/4996164/14602577/5bb4e9f2-0571-11e6-9aa1-98de49f50d76.png)

this._instance = null;
    }
    
    
    
    this._pendingStateQueue = null;
    this._pendingReplaceState = false;
    this._pendingForceUpdate = false;
    this._pendingCallbacks = null;
    this._pendingElement = null;
    
    
    this._context = null;
    this._rootNodeID = null;
    this._topLevelWrapper = null;
    
    
    
    ReactInstanceMap.remove(inst);
    
    
    
    
    
  },
  /**
   * Filters the context object to only contain keys specified in
   * `contextTypes`
   *
   * @param {object} context