Program: 124493
Project: 124493
Buggy source:
public void mergeWith(final Element textFieldElement){
  final String id=DragomeEntityManager.add(visualTextField);
  visualTextField.addValueChangeHandler(new ValueChangeHandler<Object>(){
    public void onValueChange(    ValueChangeEvent<Object> event){
      String value=(String)event.getValue();
      textFieldElement.setAttribute("String_Node_Str",value);
      ScriptHelper.put("String_Node_Str",textFieldElement,this);
      ScriptHelper.put("String_Node_Str",value,this);
      ScriptHelper.evalNoResult("String_Node_Str",this);
    }
  }
);
  visualTextField.addListener(InputListener.class,new InputListener(){
    public void inputPerformed(    VisualComponent visualComponent){
      ScriptHelper.put("String_Node_Str",textFieldElement,this);
      String value=(String)ScriptHelper.eval("String_Node_Str",this);
      visualTextField.setValue(value);
    }
  }
);
  visualTextField.addListener(FocusListener.class,new FocusListener(){
    public void focusGained(    VisualComponent component){
      ScriptHelper.put("String_Node_Str",textFieldElement,this);
      ScriptHelper.evalNoResult("String_Node_Str",this);
    }
    public void focusLost(    VisualComponent component){
    }
  }
);
  String value=visualTextField.getRenderer().render(visualTextField.getValue());
  textFieldElement.setAttribute("String_Node_Str","String_Node_Str");
  textFieldElement.setAttribute("String_Node_Str",value);
  textFieldElement.setAttribute(COMPONENT_ID_ATTRIBUTE,id);
  ScriptHelper.put("String_Node_Str",value == null ? "String_Node_Str" : value,this);
  ScriptHelper.put("String_Node_Str",textFieldElement,this);
  ScriptHelper.evalNoResult("String_Node_Str",this);
  addListeners(visualTextField,textFieldElement);
}

Fixed version (ground truth):
public void mergeWith(final Element textFieldElement){
  final String id=DragomeEntityManager.add(visualTextField);
  visualTextField.addValueChangeHandler(new ValueChangeHandler<Object>(){
    public void onValueChange(    ValueChangeEvent<Object> event){
      String value=visualTextField.getRenderer().render(event.getValue());
      textFieldElement.setAttribute("String_Node_Str",value);
      ScriptHelper.put("String_Node_Str",textFieldElement,this);
      ScriptHelper.put("String_Node_Str",value,this);
      ScriptHelper.evalNoResult("String_Node_Str",this);
    }
  }
);
  visualTextField.addListener(InputListener.class,new InputListener(){
    public void inputPerformed(    VisualComponent visualComponent){
      ScriptHelper.put("String_Node_Str",textFieldElement,this);
      String value=(String)ScriptHelper.eval("String_Node_Str",this);
      visualTextField.setValue(value);
    }
  }
);
  visualTextField.addListener(FocusListener.class,new FocusListener(){
    public void focusGained(    VisualComponent component){
      ScriptHelper.put("String_Node_Str",textFieldElement,this);
      ScriptHelper.evalNoResult("String_Node_Str",this);
    }
    public void focusLost(    VisualComponent component){
    }
  }
);
  String value=visualTextField.getRenderer().render(visualTextField.getValue());
  textFieldElement.setAttribute("String_Node_Str","String_Node_Str");
  textFieldElement.setAttribute("String_Node_Str",value);
  textFieldElement.setAttribute(COMPONENT_ID_ATTRIBUTE,id);
  ScriptHelper.put("String_Node_Str",value == null ? "String_Node_Str" : value,this);
  ScriptHelper.put("String_Node_Str",textFieldElement,this);
  ScriptHelper.evalNoResult("String_Node_Str",this);
  addListeners(visualTextField,textFieldElement);
}