title: Symfony2 compound form, associate errors with fields
body: <p>I have an embedded form with the compound and inherit_data options set to true.</p>
  
  <pre><code>public function buildForm(FormBuilderInterface $builder, array $options)
  {
      $builder-&gt;setErrorBubbling(false);
  
      $builder-&gt;add('date_start', 'date', array(
          'label'             =&gt; 'form.date_start.label',
          'widget'            =&gt; 'single_text',
          'required'          =&gt; false,
          'group'             =&gt; ['event', 'dates']
      ));
  
      $builder-&gt;add('date_end', 'date', array(
          'label'             =&gt; 'form.date_end.label',
          'widget'            =&gt; 'single_text',
          'required'          =&gt; false,
          'group'             =&gt; ['event', 'dates']
      ));
  
      $builder-&gt;add('time_zone', 'alternate_timezone', [
          'label'             =&gt; 'form.timezone.label',
          'field_help'        =&gt; 'form.timezone.help',
          'empty_value'       =&gt; 'form.timezone.empty_value',
          'required'          =&gt; false,
          'group'             =&gt; ['event', 'dates']
      ]);
  }
  
  /**
   * {@inheritdoc}
   */
  public function setDefaultOptions(OptionsResolverInterface $resolver)
  {
      $resolver-&gt;setDefaults([
          'label'        =&gt; false,
          'compound'     =&gt; true,
          'inherit_data' =&gt; true
      ]);
  }
  </code></pre>
  
  <p>I can't associate errors with my fields. The errors of this form are displayed on the parent's form, not on the field. I saw in the doc, error_bubbling can be false unless the form is compound. </p>
  
  <p>What is the solution with a compound form, to have errors associated with the field ?</p>
  
  <p>Thank you</p>