Serializer throw

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  actions: {
   	async save() {
      try {
          await this.get('foo').save();
          await this.set('saved', true);
      } catch(ex) {
        console.log("test");
        console.log(ex);
    	}
  	}
  }
});

models.foo.js

import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Model.extend({
  name: attr('string')
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
   	return this.get('store').createRecord('foo', {
      name: 'Foo 1'
    });
  },
  
  setupController(controller, model) {
    controller.set('foo', model); 
  }
});

jQuery.mockjax({
  url: '/foos',
  responseText: {
    foo: {
      id: 1,
      name: 'Foo 1*' 
    }
  }
});

serializers.foo.js

import RESTSerializer from 'ember-data/serializers/rest';

export default RESTSerializer.extend({
  serialize(snapshot) {
   	console.log('serializing...');
    
    throw new Error('Refusing to serialize');
    
    return this._super(...arguments);
  }
});

templates.application.hbs

Name: {{foo.name}}<br>

{{#if saved}}
  Saved!
{{else if error}}
  {{error}}
{{/if}}

<br>

<button onclick={{action 'save'}}>Save</button>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
       "jquery-mockjax": "https://cdnjs.cloudflare.com/ajax/libs/jquery-mockjax/1.6.2/jquery.mockjax.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0",
    "babel-polyfill":"https://cdn.rawgit.com/nicksrandall/babel-polyfill/master/browser-polyfill.js"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}