message: Another unmounted guard
diff: @@ -116,6 +116,7 @@ export default WithMatrixClient(React.createClass({
  this._addThreepid = null;
  return;
  }
  + if (this._unmounted) return;
  this.setState({msisdn_add_pending: true});
  this._addThreepid.haveMsisdnToken(token).then(() => {
  this._addThreepid = null;
  