Program: 4235
Project: 4235
Buggy source:
/** 
 * Constructs the file system using the given BTData & hash information. If any of the information is malformed, throws a ValueException.
 * @param data
 * @param numHashes
 * @param pieceLength
 * @param infoHash
 * @throws ValueException
 */
TorrentFileSystem(BTData data,int numHashes,long pieceLength,byte[] infoHash) throws ValueException {
  _name=CommonUtils.convertFileName(data.getName());
  if (_name.length() == 0)   throw new ValueException("String_Node_Str");
  File incompleteDir=SharingSettings.INCOMPLETE_DIRECTORY.getValue();
  try {
    incompleteDir=incompleteDir.getCanonicalFile();
  }
 catch (  IOException iox) {
  }
  _incompleteFile=new File(incompleteDir,Base32.encode(infoHash) + File.separator + _name);
  _completeFile=new File(SharingSettings.getSaveDirectory(),_name);
  if (data.getFiles() != null) {
    List<BTData.BTFileData> files=data.getFiles();
    List<TorrentFile> torrents=new ArrayList<TorrentFile>(files.size());
    for (    BTData.BTFileData file : files)     torrents.add(new TorrentFile(file.getLength(),new File(_completeFile,file.getPath()).getAbsolutePath()));
    if (files.size() == 0)     throw new ValueException("String_Node_Str");
    long position=0;
    for (    TorrentFile file : torrents) {
      file.setBegin((int)(position / pieceLength));
      position+=file.length();
      file.setEnd((int)(position / pieceLength));
    }
    _files=torrents;
    for (    String folderPath : data.getFolders())     _folders.add(new File(_completeFile,folderPath));
    _folders.add(_completeFile);
  }
 else {
    TorrentFile f=new TorrentFile(data.getLength(),_completeFile.getAbsolutePath());
    f.setBegin(0);
    f.setEnd(numHashes);
    _files=new ArrayList<TorrentFile>(1);
    _files.add(f);
  }
  _totalSize=calculateTotalSize(_files);
}

Fixed version (ground truth):
/** 
 * Constructs the file system using the given BTData & hash information. If any of the information is malformed, throws a ValueException.
 * @param data
 * @param numHashes
 * @param pieceLength
 * @param infoHash
 * @throws ValueException
 */
TorrentFileSystem(BTData data,int numHashes,long pieceLength,byte[] infoHash) throws IOException {
  _name=CommonUtils.convertFileName(data.getName());
  if (_name.length() == 0)   throw new ValueException("String_Node_Str");
  _incompleteFile=new File(SharingSettings.INCOMPLETE_DIRECTORY.getValue(),Base32.encode(infoHash) + File.separator + _name);
  _completeFile=new File(SharingSettings.getSaveDirectory(),_name);
  if (!FileUtils.isReallyParent(SharingSettings.getSaveDirectory(),_completeFile))   throw new SaveLocationException(SaveLocationException.SECURITY_VIOLATION,_completeFile);
  if (data.getFiles() != null) {
    List<BTData.BTFileData> files=data.getFiles();
    List<TorrentFile> torrents=new ArrayList<TorrentFile>(files.size());
    for (    BTData.BTFileData file : files) {
      TorrentFile f=new TorrentFile(file.getLength(),new File(_completeFile,file.getPath()).getAbsolutePath());
      if (!FileUtils.isReallyParent(_completeFile,f))       throw new SaveLocationException(SaveLocationException.SECURITY_VIOLATION,f);
      torrents.add(f);
    }
    if (files.size() == 0)     throw new ValueException("String_Node_Str");
    long position=0;
    for (    TorrentFile file : torrents) {
      file.setBegin((int)(position / pieceLength));
      position+=file.length();
      file.setEnd((int)(position / pieceLength));
    }
    _files=torrents;
    for (    String folderPath : data.getFolders())     _folders.add(new File(_completeFile,folderPath));
    _folders.add(_completeFile);
  }
 else {
    TorrentFile f=new TorrentFile(data.getLength(),_completeFile.getAbsolutePath());
    f.setBegin(0);
    f.setEnd(numHashes);
    _files=new ArrayList<TorrentFile>(1);
    _files.add(f);
  }
  _totalSize=calculateTotalSize(_files);
}