Program: 77805
Project: 77805
Buggy source:
/** 
 * @param dataSet
 * @param queryDefn
 * @param useColumnHints
 * @return
 * @throws BirtException
 */
public IQueryResults execute(DataSetHandle dataSet,QueryDefinition queryDefn,boolean useColumnHints,boolean useFilters) throws BirtException {
  DataSessionContext context=new DataSessionContext(DataSessionContext.MODE_DIRECT_PRESENTATION,dataSet.getModuleHandle());
  DataRequestSession session=DataRequestSession.newSession(context);
  IBaseDataSetDesign dataSetDesign=session.getModelAdaptor().adaptDataSet(dataSet);
  if (!useColumnHints) {
    dataSetDesign.getResultSetHints().clear();
  }
  if (!useFilters) {
    dataSetDesign.getFilters().clear();
  }
  IQueryResults resultSet=executeQuery(session,queryDefn);
  IResultMetaData metaData=resultSet.getResultMetaData();
  int columnCount=0;
  if (metaData != null)   columnCount=metaData.getColumnCount();
  if (dataSet.getPropertyHandle(DataSetHandle.RESULT_SET_PROP).iterator().hasNext()) {
    for (int n=0; n < columnCount; n++) {
      String columnLabel=metaData.getColumnLabel(n + 1);
      String columnName=metaData.getColumnName(n + 1);
      if (!columnLabel.equals(columnName) && columnName.lastIndexOf(RENAME_SEPARATOR) >= 0 && !columnLabel.equals(columnName.substring(0,columnName.lastIndexOf(RENAME_SEPARATOR)))) {
        dataSet.getPropertyHandle(DataSetHandle.RESULT_SET_PROP).clearValue();
        return execute(dataSet,queryDefn,useColumnHints,useFilters);
      }
    }
  }
  saveResultToDataItems(dataSet,resultSet);
  return resultSet;
}

Fixed version (ground truth):
/** 
 * @param dataSet
 * @param queryDefn
 * @param useColumnHints
 * @return
 * @throws BirtException
 */
public IQueryResults execute(DataSetHandle dataSet,QueryDefinition queryDefn,boolean useColumnHints,boolean useFilters) throws BirtException {
  DataSessionContext context=new DataSessionContext(DataSessionContext.MODE_DIRECT_PRESENTATION,dataSet.getModuleHandle());
  DataRequestSession session=DataRequestSession.newSession(context);
  IBaseDataSetDesign dataSetDesign=session.getModelAdaptor().adaptDataSet(dataSet);
  if (!useColumnHints) {
    dataSetDesign.getResultSetHints().clear();
  }
  if (!useFilters) {
    dataSetDesign.getFilters().clear();
  }
  IQueryResults resultSet=executeQuery(session,queryDefn);
  IResultMetaData metaData=resultSet.getResultMetaData();
  int columnCount=0;
  if (metaData != null)   columnCount=metaData.getColumnCount();
  if (dataSet.getPropertyHandle(DataSetHandle.RESULT_SET_HINTS_PROP) != null && dataSet.getPropertyHandle(DataSetHandle.RESULT_SET_HINTS_PROP).iterator().hasNext()) {
    for (int n=0; n < columnCount; n++) {
      String columnLabel=metaData.getColumnLabel(n + 1);
      String columnName=metaData.getColumnName(n + 1);
      if (!columnLabel.equals(columnName) && columnName.lastIndexOf(RENAME_SEPARATOR) >= 0 && !columnLabel.equals(columnName.substring(0,columnName.lastIndexOf(RENAME_SEPARATOR)))) {
        dataSet.getPropertyHandle(DataSetHandle.RESULT_SET_HINTS_PROP).clearValue();
        return execute(dataSet,queryDefn,useColumnHints,useFilters);
      }
    }
  }
  saveResultToDataItems(dataSet,resultSet);
  return resultSet;
}