title: cygpath doesn't convert Windows path correctly
body: <p><strong>command line shell</strong></p>
  
  <pre><code>echo %PIG_HOME%
  C:\cygwin\usr\lib\pig
  </code></pre>
  
  <p><strong>cygwin</strong></p>
  
  <pre><code>echo $PIG_HOME
  C:\cygwin\usr\lib\pig
  
  echo $( cygpath -u "$PIG_HOME" )
  /usr/lib/pig
  
  cd $( cygpath -u "$PIG_HOME" )
  -bash: cd: /usr/lib/pig: No such file or directory
  </code></pre>
  
  <p><strong>Question:</strong> why is <code>cygpath</code> not converting it to <code>/cygdrive/c/cygwin/usr/lib/pig</code>?</p>
  
  <p><strong>UPDATE:</strong></p>
  
  <p>The path to the <code>pig</code> folder is correct.</p>
  
  <p><strong>command line shell</strong></p>
  
  <pre><code>C:\Users\john.doe&gt; cd %PIG_HOME%
  C:\cygwin\usr\lib\pig&gt;
  </code></pre>
  
  <p><strong>cygwin</strong></p>
  
  <pre><code>john.doe@COMPUTER ~
  $ cd /cygdrive/c/cygwin/usr/lib/pig/
  
  john.doe@COMPUTER /cygdrive/c/cygwin/usr/lib/pig
  $
  </code></pre>