AngularJS: Empty - latest CI build

HTML

<script src="http://ci.angularjs.org/job/angular.js-angular-master/ws/build/angular.js"></script>
<table>
  <tr ng-repeat='ans in form.answer'>
    <td>{{ans.row}}</td>
    <td ng-repeat='col in ans.column'><input type='text' ng-model="col.word" required/></td>
    <td>[<a ng-click='addWord()'>AddCol</a>]</td>
  </tr>
</table>

JavaScript

function Main($scope) {
    $scope.form = {
        title: 'title',
        descr:'description here',
        answer: [
            {row:'1', column:[{word:'z'},{word:'x'}]},
            {row:'2', column:[{word:'a'},{word:'w'}]}]};

    $scope.addWord = function(w) {
        this.ans.column.push({word: w});
    };
}