Program: 124959
Project: 124959
Buggy source:
@Override public void mousePressed(MouseEvent me){
  List<Variable> vars=new ArrayList<Variable>();
  if (tableManager.getModel() != null && (tableManager.getModel() instanceof InputTable || tableManager.getModel() instanceof OutputTable)) {
    if (tableManager.getModel().eContainer() != null && tableManager.getModel().eContainer() instanceof PigMapData) {
      PigMapData pigMapData=(PigMapData)tableManager.getModel().eContainer();
      List<InputTable> inputTables=pigMapData.getInputTables();
      for (      InputTable table : inputTables) {
        List<TableNode> nodes=table.getNodes();
        for (        TableNode node : nodes) {
          Variable variable=new Variable();
          variable.setName(table.getName());
          variable.setValue(node.getName());
          vars.add(variable);
        }
      }
      if (GlobalServiceRegister.getDefault().isServiceRegistered(IPigMapService.class)) {
        final IPigMapService service=(IPigMapService)GlobalServiceRegister.getDefault().getService(IPigMapService.class);
        service.setPigMapData(pigMapData);
      }
    }
  }
  if (dialog instanceof TrayDialog) {
    TrayDialog parentDialog=(TrayDialog)dialog;
    dialog.setDefaultExpression(tableManager.getExpressionFilter());
    dialog.addVariables(vars);
    if (Window.OK == parentDialog.open()) {
      String expressionForTable=dialog.getExpressionForTable();
      tableManager.setExpressionFilter(expressionForTable);
      tableManager.getEditPart().getViewer().getEditDomain().getCommandStack().execute(getFilterChangeCommand(tableManager.getModel(),expressionForTable));
    }
  }
}

Fixed version (ground truth):
@Override public void mousePressed(MouseEvent me){
  List<Variable> vars=new ArrayList<Variable>();
  if (tableManager.getModel() != null && (tableManager.getModel() instanceof InputTable || tableManager.getModel() instanceof OutputTable)) {
    if (tableManager.getModel().eContainer() != null && tableManager.getModel().eContainer() instanceof PigMapData) {
      PigMapData pigMapData=(PigMapData)tableManager.getModel().eContainer();
      List<InputTable> inputTables=pigMapData.getInputTables();
      for (      InputTable table : inputTables) {
        List<TableNode> nodes=table.getNodes();
        for (        TableNode node : nodes) {
          Variable variable=new Variable();
          variable.setName(table.getName());
          variable.setValue(node.getName());
          vars.add(variable);
        }
      }
      if (GlobalServiceRegister.getDefault().isServiceRegistered(IPigMapService.class)) {
        final IPigMapService service=(IPigMapService)GlobalServiceRegister.getDefault().getService(IPigMapService.class);
        service.setPigMapData(pigMapData);
      }
    }
  }
  if (dialog instanceof TrayDialog) {
    TrayDialog parentDialog=(TrayDialog)dialog;
    MapperManager mapperManger=(MapperManager)tableManager.getMapperManger();
    mapperManger.fireCurrentDirectEditApply();
    dialog.setDefaultExpression(tableManager.getExpressionFilter());
    dialog.addVariables(vars);
    if (Window.OK == parentDialog.open()) {
      String expressionForTable=dialog.getExpressionForTable();
      tableManager.setExpressionFilter(expressionForTable);
      tableManager.getEditPart().getViewer().getEditDomain().getCommandStack().execute(getFilterChangeCommand(tableManager.getModel(),expressionForTable));
    }
  }
}