Program: 56963
Project: 56963
Buggy source:
private void createGroupingGroup(Composite parent,String groupLabel,final boolean isColumnGrouping){
  Group groupingsGroup=new Group(parent,SWT.SHADOW_ETCHED_IN);
  groupingsGroup.setText(groupLabel);
  groupingsGroup.setLayout(new GridLayout(2,false));
  groupingsGroup.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,true));
  Composite buttonComposite=new Composite(groupingsGroup,SWT.NONE);
  buttonComposite.setLayout(new GridLayout(1,false));
  buttonComposite.setLayoutData(new GridData(SWT.RIGHT,SWT.TOP,false,false));
  Button addGroupingButton=new Button(buttonComposite,SWT.PUSH);
  addGroupingButton.setText("String_Node_Str");
  addGroupingButton.setLayoutData(new GridData(SWT.FILL,SWT.TOP,true,false));
  Button editGroupingButton=new Button(buttonComposite,SWT.PUSH);
  editGroupingButton.setText("String_Node_Str");
  editGroupingButton.setLayoutData(new GridData(SWT.FILL,SWT.TOP,true,false));
  Button removeGroupingButton=new Button(buttonComposite,SWT.PUSH);
  removeGroupingButton.setText("String_Node_Str");
  removeGroupingButton.setLayoutData(new GridData(SWT.FILL,SWT.TOP,true,false));
  if (isColumnGrouping) {
    columnGroupingsList=new List(groupingsGroup,SWT.SINGLE);
    columnGroupingsList.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,true));
    columnGroupingsList.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.columnGroupingsListSelected();
      }
    }
);
    addColumnGroupingButton=addGroupingButton;
    addColumnGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.addColumnGroupingButtonSelected();
      }
    }
);
    editColumnGroupingButton=editGroupingButton;
    editColumnGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.editColumnGroupingButtonSelected();
      }
    }
);
    removeColumnGroupingButton=removeGroupingButton;
    removeColumnGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.removeColumnGroupingButtonSelected();
      }
    }
);
  }
 else {
    rowGroupingsList=new List(groupingsGroup,SWT.SINGLE);
    rowGroupingsList.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,true));
    rowGroupingsList.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.rowGroupingsListSelected();
      }
    }
);
    addRowGroupingButton=addGroupingButton;
    addRowGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.addRowGroupingButtonSelected();
      }
    }
);
    editRowGroupingButton=editGroupingButton;
    editRowGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.editRowGroupingButtonSelected();
      }
    }
);
    removeRowGroupingButton=removeGroupingButton;
    removeRowGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.removeRowGroupingButtonSelected();
      }
    }
);
  }
}

Fixed version (ground truth):
private void createGroupingGroup(Composite parent,String groupLabel,final boolean isColumnGrouping){
  Group groupingsGroup=new Group(parent,SWT.SHADOW_ETCHED_IN);
  groupingsGroup.setText(groupLabel);
  groupingsGroup.setLayout(new GridLayout(2,false));
  groupingsGroup.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,true));
  Composite buttonComposite=new Composite(groupingsGroup,SWT.NONE);
  buttonComposite.setLayout(new GridLayout(1,false));
  buttonComposite.setLayoutData(new GridData(SWT.RIGHT,SWT.TOP,false,false));
  Button addGroupingButton=new Button(buttonComposite,SWT.PUSH);
  addGroupingButton.setText("String_Node_Str");
  addGroupingButton.setLayoutData(new GridData(SWT.FILL,SWT.TOP,true,false));
  Button editGroupingButton=new Button(buttonComposite,SWT.PUSH);
  editGroupingButton.setText("String_Node_Str");
  editGroupingButton.setLayoutData(new GridData(SWT.FILL,SWT.TOP,true,false));
  Button removeGroupingButton=new Button(buttonComposite,SWT.PUSH);
  removeGroupingButton.setText("String_Node_Str");
  removeGroupingButton.setLayoutData(new GridData(SWT.FILL,SWT.TOP,true,false));
  if (isColumnGrouping) {
    columnGroupingsList=new List(groupingsGroup,SWT.SINGLE);
    columnGroupingsList.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,true));
    columnGroupingsList.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.columnGroupingsListSelected();
      }
    }
);
    addColumnGroupingButton=addGroupingButton;
    addColumnGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.addColumnGroupingButtonSelected();
      }
    }
);
    editColumnGroupingButton=editGroupingButton;
    editColumnGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.editColumnGroupingButtonSelected();
      }
    }
);
    removeColumnGroupingButton=removeGroupingButton;
    removeColumnGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.removeColumnGroupingButtonSelected();
      }
    }
);
  }
 else {
    rowGroupingsList=new List(groupingsGroup,SWT.SINGLE);
    rowGroupingsList.setLayoutData(new GridData(SWT.FILL,SWT.FILL,true,true));
    rowGroupingsList.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.rowGroupingsListSelected();
      }
    }
);
    addRowGroupingButton=addGroupingButton;
    addRowGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.addRowGroupingButtonSelected();
      }
    }
);
    editRowGroupingButton=editGroupingButton;
    editRowGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.editRowGroupingButtonSelected();
      }
    }
);
    removeRowGroupingButton=removeGroupingButton;
    removeRowGroupingButton.addSelectionListener(new SelectionAdapter(){
      @Override public void widgetSelected(      SelectionEvent e){
        mediator.removeRowGroupingButtonSelected();
      }
    }
);
  }
  if (isColumnGrouping) {
    columnGroupingsGroup=groupingsGroup;
  }
 else {
    rowGroupingsGroup=groupingsGroup;
  }
}