title: boostrap-select error: Uncaught TypeError: Cannot read property '3'
body: <p>Boostrap select live search brings an error when typing into the box snapshot <a href="https://i.stack.imgur.com/uU1Of.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uU1Of.png" alt="enter image description here"></a></p>
  
  <p>and javascript console error log</p>
  
  <pre><code>bootstrap-select.js:199 Uncaught TypeError: Cannot read property '3' of undefined
      at a.expr.pseudos.icontains (bootstrap-select.js:199)
      at jquery.js:15
      at jquery.js:15
      at jquery.js:15
      at bm (jquery.js:15)
      at bm (jquery.js:15)
      at Z (jquery.js:15)
      at Function.Z.matches (jquery.js:15)
      at Function.filter (jquery.js:15)
      at bj (jquery.js:15)
  </code></pre>
  
  <p>the select option</p>
  
  <pre><code>    &lt;select class="selectpicker" data-live-search="true" multiple&gt;
        &lt;option data-tokens="mustard"&gt;Mustard&lt;/option&gt;
        &lt;option data-tokens="ketchup"&gt;Ketchup&lt;/option&gt;
        &lt;option data-tokens="relish"&gt;Relish&lt;/option&gt;
      &lt;/select&gt;
  </code></pre>
  
  <p>selecting the options works.</p>
  
  <p>importing the libs from a cdn</p>
  
  <p><code>&lt;script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.12.1/js/bootstrap-select.min.js"&gt;&lt;/script&gt;</code></p>
  
  <p><code>&lt;link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.12.1/css/bootstrap-select.min.css"&gt;</code></p>