broken code

index.js

function *listen(el, evType) {
  while (true)
    yield function(cb) {
      var fire = function(ev) {
        el.removeEventListener(evType, fire);
        cb(null, ev);
      }
      el.addEventListener(evType, fire);
    }
}

var gens = require('gens');

function go(gen) {
  gens(gen)(function(err) { if (err) throw err; });
}

go(function*() {
  var clicks = listen(document.getElementById('search'), 'click');

  while (true)
    console.log(clicks.next().value);
});