Bug 36625 "Copy Trace" Action in "Failure Trace" View enabled for empty table.
The "Copy Trace" action should probably be hidden or unavailable when there is nothing in the "Failure Trace" view. Currently the user is given the option to copy a trace of nothing to the clipboard.
org.eclipse.jdt.junit/src/org/eclipse/jdt/internal/junit/ui/FailureTraceView.java
if (innerSeparatorIndex != -1)
				testName= testName.substring(0, innerSeparatorIndex);
			
			String lineNumber= traceLine;
			lineNumber= lineNumber.substring(lineNumber.indexOf(':') + 1, lineNumber.indexOf(")")); 
			int line= Integer.valueOf(lineNumber).intValue();
			return new OpenEditorAtLineAction(fTestRunner, testName, line);
		} catch(NumberFormatException e) {
		}
		catch(IndexOutOfBoundsException e) {	
		}	
		return null;
	}
	
	private void disposeIcons(){
		if (fExceptionIcon != null && !fExceptionIcon.isDisposed()) 
			fExceptionIcon.dispose();
		if (fStackIcon != null && !fStackIcon.isDisposed()) 
			fStackIcon.dispose();
	}
	
	/**
	 * Returns the composite used to present the trace
	 */
	Composite getComposite(){
		return fTable;
	}
	
	/**
	 * Refresh the table from the the trace.