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)

},
  _constructComponent: function(publicProps, publicContext) {
    if (__DEV__) {
      ReactCurrentOwner.current = this;
      try {
        return this._constructComponentWithoutOwner(publicProps, publicContext);
      } finally {
        ReactCurrentOwner.current = null;
      }
    } else {
      return this._constructComponentWithoutOwner(publicProps, publicContext);
    }
  },
  _constructComponentWithoutOwner: function(publicProps, publicContext) {
    var Component = this._currentElement.type;
    var instanceOrElement;
    if (shouldConstruct(Component)) {
      if (__DEV__) {
        if (this._debugID !== 0) {
          ReactInstrumentation.debugTool.onBeginLifeCycleTimer(
            this._debugID,
            'ctor'
          );
        }
      }
      instanceOrElement = new Component(publicProps, publicContext, ReactUpdateQueue);
      if (__DEV__) {
        if (this._debugID !== 0) {
          ReactInstrumentation.debugTool.onEndLifeCycleTimer(
            this._debugID,