Fix variable scope.

IPython/html/static/widgets/js/manager.js

@@ -381,16 +381,18 b' define(['
                         };
 
                         // Get the views that are displayed *now*.
+                        (function(local_state) {
                         model_promises.push(utils.resolve_promises_dict(model.views).then(function(model_views) {
                             for (var id in model_views) {
                                 if (model_views.hasOwnProperty(id)) {
                                     var view = model_views[id];
                                     if (view.options.cell_index) {
-                                        state[model_id].views.push(view.options.cell_index);
+                                            local_state.views.push(view.options.cell_index);
                                     }
                                 }
                             }
                         }));
+                        })(state[model_id]);
                     }
                 }
             }