Description Vasanthi Sathyanarayanan 2015-05-14 08:48:30 EDT

When I start a debug launch for the first time in a clean workspace and hit a break-point in a Thread which has a monitor lock, then on the debug view it selects both the running JDIThread and the first element in JDIStackframe .
Because of this wrong selection, the Expressions don't evaluate in the expressions tab.

Steps to reproduce the issue:
1> Start Eclipse with a clean workspace.
2> Create a Java project (from Java perspective).
3> Create a class with main method(with a synchronized lock) as shown below:
	public class TestClass {
	 public static void main(String[] args) {  
	  synchronized (new TestClass()) {
	   String str = "Test String";
	   System.out.print("tests");   // line A
	  }  
	 } 
	}
4> Add a debug point at system.out line (line A).
5> Start debug as -> Java application .
6> As we hit the breakpoint for the first time, we get a popup to switch to debug perspective and we switch to Debug perspective.
7> Now we can see in debug view, both the JDIThread and the JDIStacktrace selected.
8> Notice that the Variables view is empty. (where as it is supposed to have an entry for the variable "str")
9> This happens only for the first breakpoint hit and first debug launch.With later breakpoints, the debug view selection is only on JDIStackframe and hence Variables view shows variables fine. 

Note: The issue can be reproduced, by closing the debugview and starting the debug launch again and on hitting the first breakpoint.