phptwigerror

<?php

namespace Fhh\Bundle\ProductBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
use Symfony\Component\HttpFoundation\Response;
use Fhh\Bundle\ProductBundle\Entity\Product;

/**
 * @Route("/product")
 */
class DefaultController extends Controller
{
    /**
     * @Route("/list")
     */
    public function list(){
        $product = new Product();
        $list=$this->getDoctrine()->getRepository('FhhProductBundle:Product')->findAll();

        foreach ($list as $row) {
            $data['content']=array(
                'id_product'=>$row->getId_product(),
                'product_name'=>$row->getProduct_name(),
                );
        }
        var_dump($data);
        return $this->render('@FhhProductBundle/Resources/views/Default/list-product.html.twig',$data);
    }
}
==============================
twig nya
==============================


{{dump(content) }}
<br>
<table>
<tr>
    <th>Id</th>
    <th>Nama Barang</th>
</tr>
{% for isi in content %}
    <tr>
        <td>{{isi.id_product}}</td>
        <td>{{isi.product_name}}</td>
    </tr>

{% endfor %}
</table>