title: Cannot convert value of type 'Range<Int>' to expected argument type 'Range<Index>' (aka 'Range<String.CharacterView.Index>')
body: <p>I have a string here, which I am trying to substring.</p>
  
  <pre><code>let desc = "Hello world. Hello World."
  var stringRange = 1..&lt;5
  desc.substringWithRange(stringRange)
  </code></pre>
  
  <p>However Swift gives me an error with this. What have I done wrong? I am using the new notation of the stringRange because it doesn't let me use the old one.</p>