Program: 135305
Project: 135305
Buggy source:
LabelPickerDialog(TurboIssue issue,List<TurboLabel> allLabels,Stage stage){
  this.issue=issue;
  this.allLabels=allLabels;
  resultList=new HashMap<>();
  allLabels.forEach(label -> resultList.put(label.getActualName(),issue.getLabels().contains(label.getActualName())));
  initOwner(stage);
  initModality(Modality.APPLICATION_MODAL);
  setTitle("String_Node_Str" + (issue.isPullRequest() ? "String_Node_Str" : "String_Node_Str") + issue.getId()+ "String_Node_Str"+ issue.getRepoId());
  setHeaderText((issue.isPullRequest() ? "String_Node_Str" : "String_Node_Str") + issue.getId() + "String_Node_Str"+ issue.getTitle());
  ButtonType confirmButtonType=new ButtonType("String_Node_Str",ButtonBar.ButtonData.OK_DONE);
  getDialogPane().getButtonTypes().addAll(confirmButtonType,ButtonType.CANCEL);
  VBox vBox=new VBox();
  vBox.setPadding(new Insets(10));
  textField=new TextField();
  textField.setPrefColumnCount(30);
  setupKeyEvents();
  Label instructions=new Label("String_Node_Str");
  instructions.setPadding(new Insets(0,0,10,0));
  updateLabelsList("String_Node_Str");
  labelListView=new LabelListView(this);
  labelListView.setItems(labels);
  labelListView.setCellFactory(LabelPickerCell.forListView(LabelPicker.Label::checkedProperty,new StringConverter<LabelPicker.Label>(){
    @Override public String toString(    LabelPicker.Label object){
      return object.getName();
    }
    @Override public LabelPicker.Label fromString(    String string){
      return null;
    }
  }
));
  vBox.getChildren().addAll(instructions,textField,labelListView);
  getDialogPane().setContent(vBox);
  setResultConverter(dialogButton -> {
    if (dialogButton == confirmButtonType) {
      return allLabels.stream().filter(label -> resultList.get(label.getName())).map(TurboLabel::getActualName).collect(Collectors.toList());
    }
    return null;
  }
);
  labelListView.setFirstItem();
  requestFocus();
}

Fixed version (ground truth):
LabelPickerDialog(TurboIssue issue,List<TurboLabel> allLabels,Stage stage){
  this.issue=issue;
  this.allLabels=allLabels;
  resultList=new HashMap<>();
  allLabels.forEach(label -> resultList.put(label.getActualName(),issue.getLabels().contains(label.getActualName())));
  initOwner(stage);
  initModality(Modality.APPLICATION_MODAL);
  setTitle("String_Node_Str" + (issue.isPullRequest() ? "String_Node_Str" : "String_Node_Str") + issue.getId()+ "String_Node_Str"+ issue.getRepoId());
  setHeaderText((issue.isPullRequest() ? "String_Node_Str" : "String_Node_Str") + issue.getId() + "String_Node_Str"+ issue.getTitle());
  ButtonType confirmButtonType=new ButtonType("String_Node_Str",ButtonBar.ButtonData.OK_DONE);
  getDialogPane().getButtonTypes().addAll(confirmButtonType,ButtonType.CANCEL);
  VBox vBox=new VBox();
  vBox.setPadding(new Insets(10));
  textField=new TextField();
  textField.setPrefColumnCount(30);
  setupKeyEvents();
  Label instructions=new Label("String_Node_Str");
  instructions.setPadding(new Insets(0,0,10,0));
  updateLabelsList("String_Node_Str");
  labelListView=new LabelListView(this);
  labelListView.setItems(labels);
  labelListView.setCellFactory(LabelPickerCell.forListView(LabelPicker.Label::checkedProperty,new StringConverter<LabelPicker.Label>(){
    @Override public String toString(    LabelPicker.Label object){
      return object.getName();
    }
    @Override public LabelPicker.Label fromString(    String string){
      return null;
    }
  }
));
  vBox.getChildren().addAll(instructions,textField,labelListView);
  getDialogPane().setContent(vBox);
  setResultConverter(dialogButton -> {
    if (dialogButton == confirmButtonType) {
      return allLabels.stream().filter(label -> resultList.get(label.getActualName())).map(TurboLabel::getActualName).collect(Collectors.toList());
    }
    return null;
  }
);
  labelListView.setFirstItem();
  requestFocus();
}