Complex & long template with validation in ractive 0.5.5.js

Complex & long template with validation in ractive 0.5.5.js This works in 0.3.9 but in 0.5.5 shows

by rich_harris

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<script src="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<script src="http://cdn.ractivejs.org/edge/ractive.js"></script>
<div id="container"></div>

<script id="template" type="x-template">

    {{^.responsable}}y{{/.responsable}}

    <select value="{{.responsable}}">
       <option>x</option>
    </select>
    
</script>

JavaScript

var ractive = new Ractive({
  el: '#container',
  template: "#template",
    data: {  }
});