React Native text crash

gistfile1.txt

var TextBug = React.createClass({
  getInitialState: function() {
    return {seeMore: false};
  },
  render: function() {
    return (
      <Text
        style={styles.container}
        onPress={() => this.setState({seeMore: !this.state.seeMore})}>
        <Text>Tap to see more (bugs).</Text>
        {this.state.seeMore && '...tap again.'}
      </Text>
    );
  },
});

var styles = StyleSheet.create({
  container: {
    margin: 10,
    marginTop: 100,
  },
});