title: Can't see variables when debugging Java code in Eclipse
body: <p>I have very annoying problem:</p>
  
  <p>When debugging</p>
  
  <pre><code>String tm1 = "1";
  String tm2 = "";
  tm1 = tm2; 
  </code></pre>
  
  <p>Only variable tm2 is showing in Variables view in debugger mode, but not tm1.
  I assume because I used tm2 value in 3rd line. If I comment 3rd line, tm2 will disappear too.</p>
  
  <p>Why?</p>
  
  <p>I asume there is some optimization in place and Eclipse concludes that my variable is not used so it doesn't want to show it. Is there a way to turn this off?</p>
  
  <p>Also, I could swear, before in debugger, if I would hover mouse over variable, little popup would show with variable value. It's not the case any more.</p>
  
  <p>Any help is appreciated,
  Thanks</p>