Program: 128772
Project: 128772
Buggy source:
@Override public List createPastableBeansList(ExtendedTableModel extendedTable,List copiedObjectsList){
  ArrayList addItemList=new ArrayList();
  ArrayList list=new ArrayList();
  for (  Object current : copiedObjectsList) {
    if (current instanceof IMetadataColumn) {
      IMetadataColumn copy=((IMetadataColumn)current).clone();
      copy.setLabel(((MetadataTableEditor)extendedTable).getNextGeneratedColumnName(copy.getLabel()));
      addItemList.add(copy);
    }
 else     if (current instanceof MetadataColumn) {
      MetadataTableEditor tableEditor=(MetadataTableEditor)extendedTable;
      MetadataColumn metadataColumn=(MetadataColumn)current;
      String nextGeneratedColumnName=metadataColumn.getLabel();
      String tempNewColumnName="String_Node_Str";
      boolean iMetaColumnUnique=false;
      boolean metaColumnUnique=false;
      while (iMetaColumnUnique == false || metaColumnUnique == false) {
        nextGeneratedColumnName=tableEditor.getNextGeneratedColumnName(nextGeneratedColumnName,null);
        iMetaColumnUnique=true;
        metaColumnUnique=false;
        if (list.size() == 0)         metaColumnUnique=true;
 else {
          tempNewColumnName=this.getUniqueString(list,nextGeneratedColumnName);
          if (tempNewColumnName.equals(nextGeneratedColumnName))           metaColumnUnique=true;
 else {
            metaColumnUnique=false;
            nextGeneratedColumnName=tempNewColumnName;
          }
        }
      }
      MetadataColumn newColumnCopy=new ConnectionFactoryImpl().copy(metadataColumn,nextGeneratedColumnName);
      IMetadataColumn copy=(ConvertionHelper.convertToIMetaDataColumn(newColumnCopy)).clone();
      copy.setLabel(nextGeneratedColumnName);
      addItemList.add(copy);
      list.add(nextGeneratedColumnName);
    }
  }
  return addItemList;
}

Fixed version (ground truth):
@Override public List createPastableBeansList(ExtendedTableModel extendedTable,List copiedObjectsList){
  ArrayList addItemList=new ArrayList();
  ArrayList list=new ArrayList();
  ArrayList<String> labelsExisted=getLabelsExisted(extendedTable);
  for (  Object current : copiedObjectsList) {
    if (current instanceof IMetadataColumn) {
      IMetadataColumn copy=((IMetadataColumn)current).clone();
      String nextGeneratedColumnName=((MetadataTableEditor)extendedTable).getNextGeneratedColumnName(copy.getLabel());
      if (labelsExisted.contains(nextGeneratedColumnName)) {
        nextGeneratedColumnName=validateColumnName(nextGeneratedColumnName,labelsExisted);
      }
      labelsExisted.add(nextGeneratedColumnName);
      copy.setLabel(nextGeneratedColumnName);
      addItemList.add(copy);
    }
 else     if (current instanceof MetadataColumn) {
      MetadataTableEditor tableEditor=(MetadataTableEditor)extendedTable;
      MetadataColumn metadataColumn=(MetadataColumn)current;
      String nextGeneratedColumnName=metadataColumn.getLabel();
      String tempNewColumnName="String_Node_Str";
      boolean iMetaColumnUnique=false;
      boolean metaColumnUnique=false;
      while (iMetaColumnUnique == false || metaColumnUnique == false) {
        nextGeneratedColumnName=tableEditor.getNextGeneratedColumnName(nextGeneratedColumnName,null);
        iMetaColumnUnique=true;
        metaColumnUnique=false;
        if (list.size() == 0) {
          metaColumnUnique=true;
        }
 else {
          tempNewColumnName=this.getUniqueString(list,nextGeneratedColumnName);
          if (tempNewColumnName.equals(nextGeneratedColumnName)) {
            metaColumnUnique=true;
          }
 else {
            metaColumnUnique=false;
            nextGeneratedColumnName=tempNewColumnName;
          }
        }
      }
      MetadataColumn newColumnCopy=new ConnectionFactoryImpl().copy(metadataColumn,nextGeneratedColumnName);
      IMetadataColumn copy=(ConvertionHelper.convertToIMetaDataColumn(newColumnCopy)).clone();
      copy.setLabel(nextGeneratedColumnName);
      addItemList.add(copy);
      list.add(nextGeneratedColumnName);
    }
  }
  return addItemList;
}