Program: 68016
Project: 68016
Buggy source:
/** 
 * Build a DatabaseQuery from an JPQL string.
 * @param jpql the JPQL string.
 * @param flushOnExecute flush the unit of work before executing the query.
 * @param session the session to get the descriptors for this query for.
 * @param hints a list of hints to be applied to the query.
 * @return a DatabaseQuery representing the given jpql.
 */
public static DatabaseQuery buildEJBQLDatabaseQuery(String queryName,String jpql,Session session,Enum lockMode,Map<String,Object> hints,ClassLoader classLoader){
  boolean isCacheable=(queryName == null) && (hints == null);
  DatabaseQuery databaseQuery=null;
  if (isCacheable) {
    databaseQuery=(DatabaseQuery)session.getProject().getJPQLParseCache().get(jpql);
  }
  if ((databaseQuery == null) || (!databaseQuery.isPrepared())) {
    JPQLParseTree parseTree=JPQLParser.buildParseTree(queryName,jpql);
    parseTree.setClassLoader(classLoader);
    databaseQuery=parseTree.createDatabaseQuery();
    databaseQuery.setJPQLString(jpql);
    parseTree.populateQuery(databaseQuery,(AbstractSession)session);
    if (databaseQuery.isReadAllQuery()) {
      ReadAllQuery readAllQuery=(ReadAllQuery)databaseQuery;
      if (readAllQuery.hasJoining() && (readAllQuery.getDistinctState() == ReadAllQuery.DONT_USE_DISTINCT)) {
        readAllQuery.setShouldFilterDuplicates(false);
      }
    }
    parseTree.addParametersToQuery(databaseQuery);
    ((JPQLCallQueryMechanism)databaseQuery.getQueryMechanism()).getJPQLCall().setIsParsed(true);
    if (databaseQuery.isReadQuery()) {
      databaseQuery.cascadeByMapping();
    }
    if (lockMode != null) {
      if (databaseQuery.isObjectLevelReadQuery()) {
        if (((ObjectLevelReadQuery)databaseQuery).setLockModeType((LockModeType)lockMode,(AbstractSession)session)) {
          throw new PersistenceException(ExceptionLocalization.buildMessage("String_Node_Str",null));
        }
      }
 else {
        throw new IllegalArgumentException(ExceptionLocalization.buildMessage("String_Node_Str",(Object[])null));
      }
    }
    databaseQuery=applyHints(hints,databaseQuery,classLoader);
    if (isCacheable) {
      databaseQuery.prepareCall(session,new DatabaseRecord());
      session.getProject().getJPQLParseCache().put(jpql,databaseQuery);
    }
  }
  return databaseQuery;
}

Fixed version (ground truth):
/** 
 * Build a DatabaseQuery from an JPQL string.
 * @param jpql the JPQL string.
 * @param flushOnExecute flush the unit of work before executing the query.
 * @param session the session to get the descriptors for this query for.
 * @param hints a list of hints to be applied to the query.
 * @return a DatabaseQuery representing the given jpql.
 */
public static DatabaseQuery buildEJBQLDatabaseQuery(String queryName,String jpql,Session session,Enum lockMode,Map<String,Object> hints,ClassLoader classLoader){
  boolean isCacheable=(queryName == null) && (hints == null);
  DatabaseQuery databaseQuery=null;
  if (isCacheable) {
    databaseQuery=(DatabaseQuery)session.getProject().getJPQLParseCache().get(jpql);
  }
  if ((databaseQuery == null) || (!databaseQuery.isPrepared())) {
    JPQLParseTree parseTree=JPQLParser.buildParseTree(queryName,jpql);
    parseTree.setClassLoader(classLoader);
    databaseQuery=parseTree.createDatabaseQuery();
    databaseQuery.setJPQLString(jpql);
    parseTree.populateQuery(databaseQuery,(AbstractSession)session);
    if (databaseQuery.isReadAllQuery()) {
      ReadAllQuery readAllQuery=(ReadAllQuery)databaseQuery;
      if (readAllQuery.hasJoining() && (readAllQuery.getDistinctState() == ReadAllQuery.DONT_USE_DISTINCT)) {
        readAllQuery.setShouldFilterDuplicates(false);
      }
    }
    parseTree.addParametersToQuery(databaseQuery);
    ((JPQLCallQueryMechanism)databaseQuery.getQueryMechanism()).getJPQLCall().setIsParsed(true);
    if (databaseQuery.isReadQuery()) {
      databaseQuery.cascadeByMapping();
    }
    if (lockMode != null && !lockMode.name().equals(ObjectLevelReadQuery.NONE)) {
      if (databaseQuery.isObjectLevelReadQuery()) {
        if (((ObjectLevelReadQuery)databaseQuery).setLockModeType((LockModeType)lockMode,(AbstractSession)session)) {
          throw new PersistenceException(ExceptionLocalization.buildMessage("String_Node_Str",null));
        }
      }
 else {
        throw new IllegalArgumentException(ExceptionLocalization.buildMessage("String_Node_Str",(Object[])null));
      }
    }
    databaseQuery=applyHints(hints,databaseQuery,classLoader);
    if (isCacheable) {
      databaseQuery.prepareCall(session,new DatabaseRecord());
      session.getProject().getJPQLParseCache().put(jpql,databaseQuery);
    }
  }
  return databaseQuery;
}