Program: 70555
Project: 70555
Buggy source:
private void placeComponents(){
  GridLayout gl=new GridLayout();
  gl.numColumns=2;
  this.setLayout(gl);
  Group group=new Group(this,SWT.NONE);
  group.setText(Messages.getString("String_Node_Str"));
  GridData gd=new GridData(GridData.FILL_BOTH);
  gd.horizontalSpan=2;
  group.setLayoutData(gd);
  gl=new GridLayout();
  gl.numColumns=3;
  group.setLayout(gl);
  fListHyperlinks=new List(group,SWT.V_SCROLL | SWT.SINGLE | SWT.BORDER);
  gd=new GridData(GridData.FILL_BOTH);
  gd.heightHint=80;
  gd.horizontalSpan=3;
  fListHyperlinks.setLayoutData(gd);
  fBtnAdd=new Button(group,SWT.NONE);
  fBtnAdd.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnAdd.setLayoutData(gd);
  fBtnEdit=new Button(group,SWT.NONE);
  fBtnEdit.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnEdit.setLayoutData(gd);
  fBtnDelete=new Button(group,SWT.NONE);
  fBtnDelete.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnDelete.setLayoutData(gd);
  fBtnUp=new Button(group,SWT.NONE);
  fBtnUp.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnUp.setLayoutData(gd);
  fBtnDown=new Button(group,SWT.NONE);
  fBtnDown.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnDown.setLayoutData(gd);
  new Label(group,SWT.NONE);
  fBtnProperties=new Button(this,SWT.NONE);
  fBtnProperties.setText(Messages.getString("String_Node_Str"));
  gd=new GridData();
  gd.horizontalSpan=2;
  fBtnProperties.setLayoutData(gd);
  Label label=new Label(this,SWT.NONE);
  label.setText(Messages.getString("String_Node_Str"));
  fTxtTooltip=new Text(this,SWT.BORDER);
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fTxtTooltip.setLayoutData(gd);
}

Fixed version (ground truth):
private void placeComponents(){
  GridLayout gl=new GridLayout();
  gl.numColumns=2;
  this.setLayout(gl);
  Group group=new Group(this,SWT.NONE);
  group.setText(Messages.getString("String_Node_Str"));
  GridData gd=new GridData(GridData.FILL_BOTH);
  gd.horizontalSpan=2;
  group.setLayoutData(gd);
  gl=new GridLayout();
  gl.numColumns=3;
  group.setLayout(gl);
  fListHyperlinks=new List(group,SWT.V_SCROLL | SWT.H_SCROLL | SWT.SINGLE| SWT.BORDER);
  gd=new GridData(GridData.FILL_BOTH);
  gd.heightHint=80;
  gd.widthHint=100;
  gd.horizontalSpan=3;
  fListHyperlinks.setLayoutData(gd);
  fBtnAdd=new Button(group,SWT.NONE);
  fBtnAdd.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnAdd.setLayoutData(gd);
  fBtnEdit=new Button(group,SWT.NONE);
  fBtnEdit.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnEdit.setLayoutData(gd);
  fBtnDelete=new Button(group,SWT.NONE);
  fBtnDelete.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnDelete.setLayoutData(gd);
  fBtnUp=new Button(group,SWT.NONE);
  fBtnUp.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnUp.setLayoutData(gd);
  fBtnDown=new Button(group,SWT.NONE);
  fBtnDown.setText(Messages.getString("String_Node_Str"));
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fBtnDown.setLayoutData(gd);
  new Label(group,SWT.NONE);
  fBtnProperties=new Button(this,SWT.NONE);
  fBtnProperties.setText(Messages.getString("String_Node_Str"));
  gd=new GridData();
  gd.horizontalSpan=2;
  fBtnProperties.setLayoutData(gd);
  Label label=new Label(this,SWT.NONE);
  label.setText(Messages.getString("String_Node_Str"));
  fTxtTooltip=new Text(this,SWT.BORDER);
  gd=new GridData(GridData.FILL_HORIZONTAL);
  fTxtTooltip.setLayoutData(gd);
}