Program: 77947
Project: 77947
Buggy source:
public BackgroundImgCell(ObservableList<Background> backgroundList,ProfileService pservice){
  this.backgroundList=backgroundList;
  this.pservice=pservice;
  img.setFitHeight(35);
  img.setFitWidth(35);
  cellButton.setOnAction(new EventHandler<ActionEvent>(){
    @Override public void handle(    ActionEvent t){
      FileChooser fileChooser=new FileChooser();
      fileChooser.setTitle("String_Node_Str");
      fileChooser.setInitialDirectory(new File(System.getProperty("String_Node_Str")));
      fileChooser.getExtensionFilters().addAll(new FileChooser.ExtensionFilter("String_Node_Str","String_Node_Str"),new FileChooser.ExtensionFilter("String_Node_Str","String_Node_Str"));
      File file=fileChooser.showOpenDialog(new Stage());
      if (file != null) {
        Background p=backgroundList.get(getIndex());
        p.setPath(file.getAbsolutePath());
        backgroundList.remove(getIndex());
        backgroundList.add(getIndex(),p);
        img.setImage(getImage(p.getPath()));
        HBox hb=new HBox(img,cellButton);
        hb.setSpacing(10);
        hb.setAlignment(Pos.CENTER);
        setGraphic(hb);
      }
    }
  }
);
  img.addEventHandler(MouseEvent.MOUSE_CLICKED,new EventHandler<MouseEvent>(){
    @Override public void handle(    MouseEvent event){
      try {
        if (backgroundList.get(getIndex()).getPath() == null)         desktop.getDesktop().open(new File(System.getProperty("String_Node_Str") + "String_Node_Str"));
 else         desktop.getDesktop().open(new File(backgroundList.get(getIndex()).getPath()));
      }
 catch (      IOException e) {
        e.printStackTrace();
      }
    }
  }
);
}

Fixed version (ground truth):
public BackgroundImgCell(ObservableList<Background> backgroundList,BackgroundService bservice){
  this.backgroundList=backgroundList;
  this.bservice=bservice;
  img.setFitHeight(35);
  img.setFitWidth(35);
  cellButton.setOnAction(new EventHandler<ActionEvent>(){
    @Override public void handle(    ActionEvent t){
      FileChooser fileChooser=new FileChooser();
      fileChooser.setTitle("String_Node_Str");
      fileChooser.setInitialDirectory(new File(System.getProperty("String_Node_Str")));
      fileChooser.getExtensionFilters().addAll(new FileChooser.ExtensionFilter("String_Node_Str","String_Node_Str"),new FileChooser.ExtensionFilter("String_Node_Str","String_Node_Str"));
      File file=fileChooser.showOpenDialog(new Stage());
      if (file != null) {
        try {
          Background p=backgroundList.get(getIndex());
          p.setPath(file.getAbsolutePath());
          backgroundList.remove(getIndex());
          backgroundList.add(getIndex(),p);
          img.setImage(getImage(p.getPath()));
          HBox hb=new HBox(img,cellButton);
          hb.setSpacing(10);
          hb.setAlignment(Pos.CENTER);
          setGraphic(hb);
          bservice.edit(p);
        }
 catch (        ServiceException e) {
          LOGGER.error("String_Node_Str",e);
        }
      }
    }
  }
);
  img.addEventHandler(MouseEvent.MOUSE_CLICKED,new EventHandler<MouseEvent>(){
    @Override public void handle(    MouseEvent event){
      try {
        if (backgroundList.get(getIndex()).getPath() == null)         desktop.getDesktop().open(new File(System.getProperty("String_Node_Str") + "String_Node_Str"));
 else         desktop.getDesktop().open(new File(backgroundList.get(getIndex()).getPath()));
      }
 catch (      IOException e) {
        e.printStackTrace();
      }
    }
  }
);
}