java.lang.IllegalStateException: Unexpected type java.lang.Exception of kind UNION in [e.getMessage()]
   at org.netbeans.modules.debugger.jpda.projects.AST2Bytecode.matchSourceTree2Bytecode(AST2Bytecode.java:260)
   at org.netbeans.modules.debugger.jpda.projects.EditorContextImpl.computeOperations(EditorContextImpl.java:2723)
   at org.netbeans.modules.debugger.jpda.projects.EditorContextImpl.getOperations(EditorContextImpl.java:1748)
   at org.netbeans.modules.debugger.jpda.ExpressionPool.createExpressionAt(ExpressionPool.java:193)
   at org.netbeans.modules.debugger.jpda.ExpressionPool.getExpressionAt(ExpressionPool.java:102)
   at org.netbeans.modules.debugger.jpda.actions.StepActionProvider$2.run(StepActionProvider.java:592)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1432)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2042)