has-feedback on a form-group does not render correct if an input-group is used

[abishekrsrikaanth]

Code:

<form class="form-horizontal" role="form">
  <div class="form-group has-success has-feedback">
    <label class="control-label col-sm-3" for="inputSuccess3">Input with success</label>
    <div class="col-sm-9">
      <div class="input-group">
        <span class="input-group-addon">@</span>
        <input type="text" class="form-control" placeholder="Username">
      </div>
      <span class="glyphicon glyphicon-ok form-control-feedback"></span>
    </div>
  </div>
</form>

Example: http://cssdeck.com/labs/xvebpw8t

[fchiumeo]

duplicate of this #13059

[cvrebert]

Closing per @fchiumeo.