Program: 81560
Project: 81560
Buggy source:
private void repopulatePlateGrid(){
  List<HeatScreen> heatmapSelection=getFilteredHeatMap();
  int[] rowsColumns=calculateTrellisDimensions(heatmapSelection.size());
  int numRows=rowsColumns[0];
  int numColumns=rowsColumns[1];
  heatMapModel.updateTrellisConfiguration(numRows,numColumns);
  numColumns=updateTrellisTableLayout(numRows,numColumns);
  int plateNameFontSize=Utils.isWindowsPlatform() ? 8 : 12;
  Font barcodeFont=new Font("String_Node_Str",Font.PLAIN,plateNameFontSize);
  for (int i=0; i < heatmapSelection.size(); i++) {
    HeatScreen heatMapPanel=heatmapSelection.get(i);
    Plate plate=heatMapPanel.getPlate();
    int rowIndex=i / numColumns;
    String gridPosition=(i - rowIndex * numColumns) + "String_Node_Str" + (rowIndex);
    JPanel plateContainer=new JPanel();
    TitledBorder titledBorder=new TitledBorder(BorderFactory.createBevelBorder(1),plate.getBarcode(),TitledBorder.CENTER,TitledBorder.BOTTOM,barcodeFont);
    plateContainer.setBorder(titledBorder);
    plateContainer.setLayout(new BorderLayout());
    String title=plate.getBarcode();
    FontMetrics metrics=plateContainer.getFontMetrics(barcodeFont);
    if (metrics.stringWidth(title) >= HEATMAP_WIDTH) {
      while (metrics.stringWidth(title + "String_Node_Str") > HEATMAP_WIDTH) {
        if (title.length() < 2) {
          break;
        }
        title=title.substring(0,title.length() - 1);
      }
      titledBorder.setTitle(title + "String_Node_Str");
    }
    plateContainer.add(heatMapPanel,BorderLayout.CENTER);
    heatMapsContainer.add(plateContainer,gridPosition);
  }
  updateContainerDimensions(numRows,numColumns);
  JPanel firstPlate=getFistPlate();
  if (!(firstPlate == null)) {
    Insets plateInsets=firstPlate.getInsets();
    updateContainerDimensions(numRows,numColumns,(plateInsets.left + plateInsets.right),(plateInsets.top + plateInsets.bottom));
  }
  invalidate();
  updateUI();
  repaint();
}

Fixed version (ground truth):
private void repopulatePlateGrid(){
  List<HeatScreen> heatmapSelection=createHeatMaps();
  int[] rowsColumns=calculateTrellisDimensions(heatmapSelection.size());
  int numRows=rowsColumns[0];
  int numColumns=rowsColumns[1];
  heatMapModel.updateTrellisConfiguration(numRows,numColumns);
  numColumns=updateTrellisTableLayout(numRows,numColumns);
  int plateNameFontSize=Utils.isWindowsPlatform() ? 8 : 12;
  Font barcodeFont=new Font("String_Node_Str",Font.PLAIN,plateNameFontSize);
  for (int i=0; i < heatmapSelection.size(); i++) {
    HeatScreen heatMapPanel=heatmapSelection.get(i);
    Plate plate=heatMapPanel.getPlate();
    int rowIndex=i / numColumns;
    String gridPosition=(i - rowIndex * numColumns) + "String_Node_Str" + (rowIndex);
    JPanel plateContainer=new JPanel();
    TitledBorder titledBorder=new TitledBorder(BorderFactory.createBevelBorder(1),plate.getBarcode(),TitledBorder.CENTER,TitledBorder.BOTTOM,barcodeFont);
    plateContainer.setBorder(titledBorder);
    plateContainer.setLayout(new BorderLayout());
    String title=plate.getBarcode();
    FontMetrics metrics=plateContainer.getFontMetrics(barcodeFont);
    if (metrics.stringWidth(title) >= HEATMAP_WIDTH) {
      while (metrics.stringWidth(title + "String_Node_Str") > HEATMAP_WIDTH) {
        if (title.length() < 2) {
          break;
        }
        title=title.substring(0,title.length() - 1);
      }
      titledBorder.setTitle(title + "String_Node_Str");
    }
    plateContainer.add(heatMapPanel,BorderLayout.CENTER);
    heatMapsContainer.add(plateContainer,gridPosition);
  }
  updateContainerDimensions(numRows,numColumns);
  JPanel firstPlate=getFistPlate();
  if (!(firstPlate == null)) {
    Insets plateInsets=firstPlate.getInsets();
    updateContainerDimensions(numRows,numColumns,(plateInsets.left + plateInsets.right),(plateInsets.top + plateInsets.bottom));
  }
  invalidate();
  updateUI();
  repaint();
}