title: 'Symbol's function definition is void: nil' which symbol?
body: <p>I'm getting the following error when starting emacs: (as shown from the <em>messages</em> buffer):</p>
  
  <pre><code>c-font-lock-fontify-region: Symbol's function definition is void: nil
  </code></pre>
  
  <p>How do I track down what exactly is causing the error in this function?  debug-on-error is true, but it still doesn't give any more information here.</p>