Program: 61592
Project: 61592
Buggy source:
public TextPanel(final MainPanel mainPanel){
  super(new BorderLayout());
  DefaultSyntaxKit.initKit();
  this.mainPanel=mainPanel;
  textSearchPanel=new SearchPanel<>(new FlowLayout(),mainPanel);
  textSearchPanel.setAlignmentX(0);
  JPanel topPanel=new JPanel();
  topPanel.setLayout(new BoxLayout(topPanel,BoxLayout.Y_AXIS));
  topPanel.add(textSearchPanel);
  textValue=new LineMarkedEditorPane();
  add(new JScrollPane(textValue),BorderLayout.CENTER);
  textValue.setFont(new Font("String_Node_Str",Font.PLAIN,textValue.getFont().getSize()));
  textValue.setContentType("String_Node_Str");
  textValue.getDocument().addDocumentListener(new DocumentListener(){
    @Override public void insertUpdate(    DocumentEvent e){
      textChanged();
    }
    @Override public void removeUpdate(    DocumentEvent e){
      textChanged();
    }
    @Override public void changedUpdate(    DocumentEvent e){
      textChanged();
    }
  }
);
  JPanel textButtonsPanel=new JPanel();
  textButtonsPanel.setLayout(new FlowLayout(SwingConstants.WEST));
  textAlignLeftButton=createButton(null,"String_Node_Str","String_Node_Str",e -> textAlign(TextAlign.LEFT));
  textAlignCenterButton=createButton(null,"String_Node_Str","String_Node_Str",e -> textAlign(TextAlign.CENTER));
  textAlignRightButton=createButton(null,"String_Node_Str","String_Node_Str",e -> textAlign(TextAlign.RIGHT));
  textAlignJustifyButton=createButton(null,"String_Node_Str","String_Node_Str",e -> textAlign(TextAlign.JUSTIFY));
  decreaseTranslateXButton=createButton(null,"String_Node_Str","String_Node_Str",e -> translateX(-(int)SWF.unitDivisor,((JRepeatButton)e.getSource()).getRepeatCount()),true);
  increaseTranslateXButton=createButton(null,"String_Node_Str","String_Node_Str",e -> translateX((int)SWF.unitDivisor,((JRepeatButton)e.getSource()).getRepeatCount()),true);
  undoChangesButton=createButton(null,"String_Node_Str","String_Node_Str",e -> undoChanges());
  textButtonsPanel.add(textAlignLeftButton);
  textButtonsPanel.add(textAlignCenterButton);
  textButtonsPanel.add(textAlignRightButton);
  textButtonsPanel.add(textAlignJustifyButton);
  textButtonsPanel.add(decreaseTranslateXButton);
  textButtonsPanel.add(increaseTranslateXButton);
  textButtonsPanel.add(undoChangesButton);
  textButtonsPanel.setAlignmentX(0);
  topPanel.add(textButtonsPanel);
  add(topPanel,BorderLayout.NORTH);
  JPanel buttonsPanel=new JPanel(new FlowLayout());
  textEditButton=createButton("String_Node_Str","String_Node_Str",null,e -> editText());
  textSaveButton=createButton("String_Node_Str","String_Node_Str",null,e -> saveText());
  textCancelButton=createButton("String_Node_Str","String_Node_Str",null,e -> cancelText());
  buttonsPanel.add(textEditButton);
  buttonsPanel.add(textSaveButton);
  buttonsPanel.add(textCancelButton);
  add(buttonsPanel,BorderLayout.SOUTH);
}

Fixed version (ground truth):
public TextPanel(final MainPanel mainPanel){
  super(new BorderLayout());
  DefaultSyntaxKit.initKit();
  this.mainPanel=mainPanel;
  textSearchPanel=new SearchPanel<>(new FlowLayout(),mainPanel);
  textSearchPanel.setAlignmentX(0);
  JPanel topPanel=new JPanel();
  topPanel.setLayout(new BoxLayout(topPanel,BoxLayout.Y_AXIS));
  topPanel.add(textSearchPanel);
  textValue=new LineMarkedEditorPane();
  add(new JScrollPane(textValue),BorderLayout.CENTER);
  textValue.setFont(new Font("String_Node_Str",Font.PLAIN,textValue.getFont().getSize()));
  textValue.setContentType("String_Node_Str");
  textValue.getDocument().addDocumentListener(new DocumentListener(){
    @Override public void insertUpdate(    DocumentEvent e){
      textChanged();
    }
    @Override public void removeUpdate(    DocumentEvent e){
      textChanged();
    }
    @Override public void changedUpdate(    DocumentEvent e){
      textChanged();
    }
  }
);
  JPanel textButtonsPanel=new JPanel();
  textButtonsPanel.setLayout(new FlowLayout(SwingConstants.WEST));
  textAlignLeftButton=createButton(null,"String_Node_Str","String_Node_Str",e -> textAlign(TextAlign.LEFT));
  textAlignCenterButton=createButton(null,"String_Node_Str","String_Node_Str",e -> textAlign(TextAlign.CENTER));
  textAlignRightButton=createButton(null,"String_Node_Str","String_Node_Str",e -> textAlign(TextAlign.RIGHT));
  textAlignJustifyButton=createButton(null,"String_Node_Str","String_Node_Str",e -> textAlign(TextAlign.JUSTIFY));
  decreaseTranslateXButton=createButton(null,"String_Node_Str","String_Node_Str",e -> translateX(-(int)SWF.unitDivisor,((JRepeatButton)e.getSource()).getRepeatCount()),true);
  increaseTranslateXButton=createButton(null,"String_Node_Str","String_Node_Str",e -> translateX((int)SWF.unitDivisor,((JRepeatButton)e.getSource()).getRepeatCount()),true);
  undoChangesButton=createButton(null,"String_Node_Str","String_Node_Str",e -> undoChanges());
  textButtonsPanel.add(textAlignLeftButton);
  textButtonsPanel.add(textAlignCenterButton);
  textButtonsPanel.add(textAlignRightButton);
  textButtonsPanel.add(textAlignJustifyButton);
  textButtonsPanel.add(decreaseTranslateXButton);
  textButtonsPanel.add(increaseTranslateXButton);
  textButtonsPanel.add(undoChangesButton);
  textButtonsPanel.setAlignmentX(0);
  topPanel.add(textButtonsPanel);
  add(topPanel,BorderLayout.NORTH);
  JPanel buttonsPanel=new JPanel(new FlowLayout());
  textEditButton=createButton("String_Node_Str","String_Node_Str",null,e -> editText());
  textSaveButton=createButton("String_Node_Str","String_Node_Str",null,e -> saveText(true));
  textCancelButton=createButton("String_Node_Str","String_Node_Str",null,e -> cancelText());
  buttonsPanel.add(textEditButton);
  buttonsPanel.add(textSaveButton);
  buttonsPanel.add(textCancelButton);
  add(buttonsPanel,BorderLayout.SOUTH);
}