Cannot expand Sets in state viewer

[mnpenner]

When I click the little arrow beside a Set in the state viewer, it does not expand like with other objects and arrays.

I've created a fiddle, but I can't figure out how to open React Dev Tools there. Here's a raw gist that demonstrates the problem.

var Hello = React.createClass({
  getInitialState: function() {
    return {items: new Set([1,2,3])};
  },

  render: function() {
    return <div>{'{' + Array.from(this.state.items).join(',') + '}'}</div>;
  }
});

ReactDOM.render(
  <Hello name="World" />,
  document.getElementById('container')
);

[g1eny0ung]

+1, same situation

[gaearon]

This will be fixed by #459 if it gets merged.

Another way this error may log is as:

Uncaught TypeError: Cannot read property 'size' of undefined
    at Set.get 

[gaearon]

Seems like this is still an issue after #459.

[gaearon]

Hmm, I think I made a mistake while testing. It does seem to work on master for me now.
So closed by #459, will release the fix soon.