Program: 153304
Project: 153304
Buggy source:
@Override public void start(Stage stage){
  stage.setTitle("String_Node_Str");
  Group container=new Group();
  Scene scene=new Scene(container,400,200);
  Rectangle rect=new Rectangle(50,10,300,70);
  rect.setStroke(Color.BLACK);
  container.getChildren().add(rect);
  Label redLabel=new Label("String_Node_Str");
  redLabel.setPrefSize(40,30);
  redLabel.setLayoutX(20);
  redLabel.setLayoutY(100);
  container.getChildren().add(redLabel);
  Label greenLabel=new Label("String_Node_Str");
  greenLabel.setPrefSize(40,30);
  greenLabel.setLayoutX(20);
  greenLabel.setLayoutY(130);
  container.getChildren().add(greenLabel);
  Label blueLabel=new Label("String_Node_Str");
  blueLabel.setPrefSize(40,30);
  blueLabel.setLayoutX(20);
  blueLabel.setLayoutY(160);
  container.getChildren().add(blueLabel);
  final Slider red=new Slider(0,254,254);
  red.setPrefSize(300,30);
  red.setLayoutX(50);
  red.setLayoutY(100);
  container.getChildren().add(red);
  final Slider green=new Slider(0,254,254);
  green.setPrefSize(300,30);
  green.setLayoutX(50);
  green.setLayoutY(130);
  container.getChildren().add(green);
  final Slider blue=new Slider(0,254,254);
  blue.setPrefSize(300,30);
  blue.setLayoutX(50);
  blue.setLayoutY(160);
  container.getChildren().add(blue);
  ObjectBinding<Color> binding=new ObjectBinding<Color>(){
{
      super.bind(red.valueProperty());
      super.bind(green.valueProperty());
      super.bind(blue.valueProperty());
    }
    @Override protected Color computeValue(){
      return Color.rgb((int)red.getValue(),(int)green.getValue(),(int)blue.getValue());
    }
  }
;
  rect.fillProperty().bind(binding);
  stage.setScene(scene);
  stage.show();
}

Fixed version (ground truth):
@Override public void start(Stage stage){
  stage.setTitle("String_Node_Str");
  Group container=new Group();
  Scene scene=new Scene(container,400,200);
  Rectangle rect=new Rectangle(50,10,300,70);
  rect.setStroke(Color.BLACK);
  container.getChildren().add(rect);
  Label redLabel=new Label("String_Node_Str");
  redLabel.setPrefSize(40,30);
  redLabel.setLayoutX(20);
  redLabel.setLayoutY(100);
  container.getChildren().add(redLabel);
  Label greenLabel=new Label("String_Node_Str");
  greenLabel.setPrefSize(40,30);
  greenLabel.setLayoutX(20);
  greenLabel.setLayoutY(130);
  container.getChildren().add(greenLabel);
  Label blueLabel=new Label("String_Node_Str");
  blueLabel.setPrefSize(40,30);
  blueLabel.setLayoutX(20);
  blueLabel.setLayoutY(160);
  container.getChildren().add(blueLabel);
  final Slider red=new Slider(0,254,254);
  red.setPrefSize(300,30);
  red.setLayoutX(50);
  red.setLayoutY(100);
  container.getChildren().add(red);
  final Slider green=new Slider(0,254,254);
  green.setPrefSize(300,30);
  green.setLayoutX(50);
  green.setLayoutY(130);
  container.getChildren().add(green);
  final Slider blue=new Slider(0,254,254);
  blue.setPrefSize(300,30);
  blue.setLayoutX(50);
  blue.setLayoutY(160);
  container.getChildren().add(blue);
  binding=new ObjectBinding<Color>(){
{
      super.bind(red.valueProperty());
      super.bind(green.valueProperty());
      super.bind(blue.valueProperty());
    }
    @Override protected Color computeValue(){
      return Color.rgb((int)red.getValue(),(int)green.getValue(),(int)blue.getValue());
    }
  }
;
  rect.fillProperty().bind(binding);
  stage.setScene(scene);
  stage.show();
}