title: Eclipse Oxygen generate toString generation not working
body: <p>After I configured Eclipse Oxygen to work with Java 9, when I go to Source => Generate <code>toString()</code> I get this error message:</p>
  
  <blockquote>
    <p><em>Cannot create method implementations.</em><br>
    <em>Reason: module:java.base is not on its project's build path</em></p>
  </blockquote>
  
  <p>Generating the <code>constructor</code>, getters and setters, <code>hashcode()</code> and <code>equals()</code> works fine, only the <code>toString()</code> doesn't work.</p>
  
  <p>If I type the <code>toString()</code> method manually it works fine.  Also if I create a project using the JRE 8, generate <code>toString()</code> work fine. Any ideas how to fix it?</p>