title: Why does recursive grep show 'No such file or directory' errors?
body: <p>I'm grepping a local svn directory. When I run <code>grep -r "pattern" .</code> I get some errors such as</p>
  
  <blockquote>
    <p>grep: ./Data/test: No such file or directory</p>
  </blockquote>
  
  <p>Who asked <code>grep</code> to look for non-existent files?</p>
  
  <hr>
  
  <pre><code>&gt;grep --version
  grep (GNU grep) 2.10
  
  &gt;lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 12.04 LTS
  </code></pre>