The code

``` javascript
class Comp extends React.Component {
  componentWillMount() {
    setTimeout(() => {
      this.setState({});
    });
  }

  render() {
    return <div onClick={() => {}} />;
  }
}

ReactDOMServer.renderToString(<Comp />);
```

produces errors:

> Warning: React can't find the root component node for data-reactid value `.0`. If you're seeing this message, it probably means that you've loaded two copies of React on the page. At this time, only a single copy of React can be loaded at a time.
> 
> Uncaught TypeError: Cannot read property 'firstChild' of undefined

But if I remove `onClick` handler the errors go away...

See demo: http://codepen.io/dened/pen/YyByYr

var willReceive = false;
    var nextContext;
    var nextProps;
    
    if (this._context === nextUnmaskedContext) {
      nextContext = inst.context;
    } else {
      nextContext = this._processContext(nextUnmaskedContext);
      willReceive = true;
    }
    nextProps = nextParentElement.props;
    
    if (prevParentElement !== nextParentElement) {
      willReceive = true;
    }
    
    
    
    if (willReceive && inst.componentWillReceiveProps) {
      if (__DEV__) {
        if (this._debugID !== 0) {
          ReactInstrumentation.debugTool.onBeginLifeCycleTimer(
            this._debugID,
            'componentWillReceiveProps'
          );
        }
      }
      inst.componentWillReceiveProps(nextProps, nextContext);
      if (__DEV__) {
        if (this._debugID !== 0) {