Program: 138933
Project: 138933
Buggy source:
/** 
 * @param folderPath
 * @retur Get all Children from TXT by 'folderPath',contain file or subFoldern
 */
public static List<Object> getChildFromTXT(String folderPath){
  List<Object> ls=new ArrayList<Object>();
  try {
    IPath iPath=null;
    IFile file=null;
    IFolder folder=null;
    HashSet<String> set=new HashSet<String>();
    DQRecycleBinNode rbn=null;
    List<String[]> delElements=readFileByLine();
    for (    String[] es : delElements) {
      if (es.length < 2 || folderType.equals(es[0] + "String_Node_Str") && folderPath.equals(es[1]))       continue;
      if (es[1].startsWith(folderPath)) {
        iPath=new Path(es[1]);
        if (es[0].equals("String_Node_Str")) {
          file=ResourcesPlugin.getWorkspace().getRoot().getFile(iPath);
          if (file.getParent().getFullPath().toOSString().equals(folderPath)) {
            rbn=new DQRecycleBinNode();
            rbn.setObject(file);
            ls.add(rbn);
          }
 else {
            addToSet(es[1],folderPath,set);
          }
        }
 else         if (es[0].equals("String_Node_Str")) {
          addToSet(es[1],folderPath,set);
        }
      }
    }
    Iterator<String> iterator=set.iterator();
    while (iterator.hasNext()) {
      rbn=new DQRecycleBinNode();
      folder=ResourcesPlugin.getWorkspace().getRoot().getFolder(new Path(iterator.next()));
      rbn.setObject(folder);
      ls.add(rbn);
    }
  }
 catch (  Exception exc) {
    log.error(exc,exc);
  }
  return ls;
}

Fixed version (ground truth):
/** 
 * Get all Children from TXT by 'folderPath',contain file or subFoldern.
 * @param folderPath
 * @return
 */
public static List<Object> getChildFromTXT(String folderPath){
  List<Object> ls=new ArrayList<Object>();
  try {
    IPath iPath=null;
    IFile file=null;
    IFolder folder=null;
    HashSet<String> set=new HashSet<String>();
    DQRecycleBinNode rbn=null;
    for (    String[] es : delLs) {
      if (es.length < 2 || folderType.equals(es[0] + "String_Node_Str") && folderPath.equals(es[1]))       continue;
      if (es[1].startsWith(folderPath)) {
        iPath=new Path(es[1]);
        if (es[0].equals("String_Node_Str")) {
          file=ResourcesPlugin.getWorkspace().getRoot().getFile(iPath);
          if (file.getParent().getFullPath().toOSString().equals(folderPath)) {
            rbn=new DQRecycleBinNode();
            rbn.setObject(file);
            ls.add(rbn);
            IFolder rootFolder=(IFolder)file.getParent();
            for (            IResource res : rootFolder.members()) {
              if (res.getType() == IResource.FOLDER && ((IFolder)res).members().length == 0) {
                set.add(folderPath + slashStr + ((IFolder)res).getName());
              }
            }
          }
 else {
            addToSet(es[1],folderPath,set);
          }
        }
      }
    }
    Iterator<String> iterator=set.iterator();
    while (iterator.hasNext()) {
      rbn=new DQRecycleBinNode();
      folder=ResourcesPlugin.getWorkspace().getRoot().getFolder(new Path(iterator.next()));
      rbn.setObject(folder);
      ls.add(rbn);
    }
  }
 catch (  Exception exc) {
    log.error(exc,exc);
  }
  return ls;
}