jQuery Select2 TypeError：b未定义

Question

我正在使用jQuery (1.12.4)和Select2 (4.0.3)从数据库中选择多个值，但我遇到了以下错误。

  

TypeError：b未定义

JS代码

    $('#country').select2(
    {
        placeholder: '--- Select ---',
        multiple: true,
        ajax:
        {
            url: '<?=site_url()?>/countries',
            dataType: 'json',
            type: 'POST',
            delay: 1000,
            processResults: function (data)
            {
                console.log(data);
                var myResults = [];
                $.each(data, function (index, item)
                {
                    myResults.push(
                    {
                        'id': item.id,
                        'text': item.text
                    });
                });
                return
                {
                    results: myResults
                };
            },
            cache: true
        }
    });

JSON响应

 [{"id":"US","text":"United States"},{"id":"RE","text":"Reunion"},{"id":"TZ","text":"Tanzania, United Republic of"},{"id":"TN","text":"Tunisia"},{"id":"AE","text":"United Arab Emirates"},{"id":"GB","text":"United Kingdom"},{"id":"UM","text":"United States minor outlying islands"}]

HTML非常简单

<select id="country"></select>

PHP代码

$this->db->like('name', $this->input->post("q"));
            $query = $this->db->select('code AS id, name as text')
                    ->limit(20)
                    ->get("countries");
            $records = $query->result();
echo json_encode($records);