title: Eclipse Mars: ANT Task references missing SWT library
body: <p>I just upgraded to Eclipse Mars and suddenly my ANT task working fine with Lunar complains:</p>
  
  <pre><code>The archive: C:/Program%20Files/eclipse_lunar/plugins/org.eclipse.swt.win32.win32.x86_64_3.104.0.v20150528-0211.jar which is referenced by the classpath, does not exist.
  </code></pre>
  
  <p>Which is weird, because </p>
  
  <ul>
  <li>I'm sure none .classpath file does reference to this jar</li>
  <li>the jar actually exists under that path</li>
  </ul>
  
  <p>After some research it seems it is related to <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=470390">https://bugs.eclipse.org/bugs/show_bug.cgi?id=470390</a></p>
  
  <p>Anyone has a solution to run my ANT (besides from using lunar again) ?</p>