title: window.onerror getting an empty url?
body: <p>What would cause window.onerror to receive an empty url parameter?
  A client is getting JS errors every 16 seconds and my logs show the error has no url.
  Is this likely from a plugin?
  Is it safe to ignore errors from window.onerror that have an empty URL?</p>
  
  <p>This is happening in safari for the record, and I don't have access to the computer</p>
  
  <pre><code>webkit: true
  version: 537.36
  safari: true
  Netscape 5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.76 Safari/537.36
  </code></pre>