Program: 29259
Project: 29259
Buggy source:
@NotNull public static File backup(@NotNull final Backupable target,@NotNull final File backupRoot,@Nullable final String backupNamePrefix,final boolean zip) throws Exception {
  final BackupStrategy strategy=target.getBackupStrategy();
  if (!backupRoot.exists() && !backupRoot.mkdirs()) {
    throw new IOException("String_Node_Str" + backupRoot.getAbsolutePath());
  }
  final File backupFile;
  try {
    strategy.beforeBackup();
    final ArchiveOutputStream archive;
    if (zip) {
      final String fileName=getTimeStampedZipFileName();
      backupFile=new File(backupRoot,backupNamePrefix == null ? fileName : backupNamePrefix + fileName);
      final ZipArchiveOutputStream zipArchive=new ZipArchiveOutputStream(new BufferedOutputStream(new FileOutputStream(backupFile)));
      zipArchive.setLevel(Deflater.BEST_COMPRESSION);
      archive=zipArchive;
    }
 else {
      final String fileName=getTimeStampedTarGzFileName();
      backupFile=new File(backupRoot,backupNamePrefix == null ? fileName : backupNamePrefix + fileName);
      archive=new TarArchiveOutputStream(new GZIPOutputStream(new BufferedOutputStream(new FileOutputStream(backupFile)),0x1000));
    }
    for (    final BackupStrategy.FileDescriptor fd : strategy.listFiles()) {
      final File file=fd.getFile();
      if (file.isFile()) {
        final long fileSize=Math.min(file.length(),strategy.acceptFile(file));
        if (fileSize > 0L) {
          archiveFile(archive,fd.getPath(),file,fileSize);
        }
      }
    }
    archive.close();
    log.info("String_Node_Str" + backupFile.getName() + "String_Node_Str");
  }
  finally {
    strategy.afterBackup();
  }
  return backupFile;
}

Fixed version (ground truth):
@NotNull public static File backup(@NotNull final Backupable target,@NotNull final File backupRoot,@Nullable final String backupNamePrefix,final boolean zip) throws Exception {
  final BackupStrategy strategy=target.getBackupStrategy();
  if (!backupRoot.exists() && !backupRoot.mkdirs()) {
    throw new IOException("String_Node_Str" + backupRoot.getAbsolutePath());
  }
  final File backupFile;
  strategy.beforeBackup();
  try {
    final ArchiveOutputStream archive;
    if (zip) {
      final String fileName=getTimeStampedZipFileName();
      backupFile=new File(backupRoot,backupNamePrefix == null ? fileName : backupNamePrefix + fileName);
      final ZipArchiveOutputStream zipArchive=new ZipArchiveOutputStream(new BufferedOutputStream(new FileOutputStream(backupFile)));
      zipArchive.setLevel(Deflater.BEST_COMPRESSION);
      archive=zipArchive;
    }
 else {
      final String fileName=getTimeStampedTarGzFileName();
      backupFile=new File(backupRoot,backupNamePrefix == null ? fileName : backupNamePrefix + fileName);
      archive=new TarArchiveOutputStream(new GZIPOutputStream(new BufferedOutputStream(new FileOutputStream(backupFile)),0x1000));
    }
    for (    final BackupStrategy.FileDescriptor fd : strategy.listFiles()) {
      final File file=fd.getFile();
      if (file.isFile()) {
        final long fileSize=Math.min(file.length(),strategy.acceptFile(file));
        if (fileSize > 0L) {
          archiveFile(archive,fd.getPath(),file,fileSize);
        }
      }
    }
    archive.close();
    log.info("String_Node_Str" + backupFile.getName() + "String_Node_Str");
  }
 catch (  Throwable t) {
    strategy.onError(t);
    throw ExodusException.toExodusException(t,"String_Node_Str");
  }
 finally {
    strategy.afterBackup();
  }
  return backupFile;
}