title: line_profiler returning no output
body: <p>I've installed <code>line_profiler</code> using <code>pip install line_profiler</code>. I'm on Mac OSX 10.8.5, with Python 2.7.</p>
  
  <p>I run <code>kernprof -l ~/Desktop/sum.py</code>, and get</p>
  
  <pre><code>(default code output)
  Wrote profile results to sum.py.lprof
  </code></pre>
  
  <p>But then running <code>python -m line_profiler sum.py.lprof</code> gives me:</p>
  
  <pre><code>Timer unit: 1e-06 s
  </code></pre>
  
  <p>and no other output. My program code is here: <a href="https://github.com/jbzdarkid/EgyptianFractions/blob/master/sum.py" rel="nofollow">sum.py</a>.</p>