title: getting error #<TypeError: wrong argument type nil (expected Symbol)> when using binding.pry in rails 4
body: <p>getting this weird error</p>
  
  <pre><code>#&lt;TypeError: wrong argument type nil (expected Symbol)&gt;
  </code></pre>
  
  <p>in utf8_sanitizer</p>
  
  <p>when doing <code>next</code> using <code>binding.pry</code> in <strong>rails 4.2.1</strong> with <strong>ruby 2.2.0</strong></p>
  
  <p>otherwise running without any error.</p>