Program: 3792
Project: 3792
Buggy source:
public void setSaveFile(File saveDirectory,String fileName,boolean overwrite) throws DownloadException {
  if (fileName == null) {
    fileName=getDefaultFileName();
  }
  Category category=null;
  if (fileName != null) {
    category=categoryManager.getCategoryForExtension(FileUtils.getFileExtension(fileName));
  }
  if (saveDirectory == null) {
    saveDirectory=SharingSettings.getSaveDirectory(category);
  }
  if (!saveDirectory.exists()) {
    saveDirectory.mkdirs();
  }
  try {
    fileName=CommonUtils.convertFileName(saveDirectory,fileName);
  }
 catch (  IOException ie) {
    if (saveDirectory.isDirectory()) {
      throw new DownloadException(ErrorCode.PATH_NAME_TOO_LONG,saveDirectory);
    }
  }
  if (!saveDirectory.isDirectory()) {
    if (saveDirectory.exists()) {
      throw new DownloadException(ErrorCode.NOT_A_DIRECTORY,saveDirectory);
    }
    throw new DownloadException(ErrorCode.DIRECTORY_DOES_NOT_EXIST,saveDirectory);
  }
  File candidateFile=new File(saveDirectory,fileName);
  try {
    if (!FileUtils.isReallyParent(saveDirectory,candidateFile))     throw new DownloadException(ErrorCode.SECURITY_VIOLATION,candidateFile);
  }
 catch (  IOException e) {
    throw new DownloadException(ErrorCode.FILESYSTEM_ERROR,candidateFile);
  }
  if (!FileUtils.setWriteable(saveDirectory))   throw new DownloadException(ErrorCode.DIRECTORY_NOT_WRITEABLE,saveDirectory);
  if (candidateFile.exists()) {
    if (!candidateFile.isFile() && !(this instanceof BTDownloader))     throw new DownloadException(ErrorCode.FILE_NOT_REGULAR,candidateFile);
    if (!overwrite)     throw new DownloadException(ErrorCode.FILE_ALREADY_EXISTS,candidateFile);
  }
  if (saveLocationManager.isSaveLocationTaken(candidateFile)) {
    throw new DownloadException(ErrorCode.FILE_IS_ALREADY_DOWNLOADED_TO,candidateFile);
  }
synchronized (this) {
    if (!isRelocatable())     throw new DownloadException(ErrorCode.FILE_ALREADY_SAVED,candidateFile);
    this.saveFile=candidateFile;
  }
}

Fixed version (ground truth):
public void setSaveFile(File saveDirectory,String fileName,boolean overwrite) throws DownloadException {
  if (fileName == null) {
    fileName=getDefaultFileName();
  }
  Category category=null;
  if (fileName != null) {
    category=categoryManager.getCategoryForFilename(fileName);
  }
  if (saveDirectory == null) {
    saveDirectory=SharingSettings.getSaveDirectory(category);
  }
  if (!saveDirectory.exists()) {
    saveDirectory.mkdirs();
  }
  try {
    fileName=CommonUtils.convertFileName(saveDirectory,fileName);
  }
 catch (  IOException ie) {
    if (saveDirectory.isDirectory()) {
      throw new DownloadException(ErrorCode.PATH_NAME_TOO_LONG,saveDirectory);
    }
  }
  if (!saveDirectory.isDirectory()) {
    if (saveDirectory.exists()) {
      throw new DownloadException(ErrorCode.NOT_A_DIRECTORY,saveDirectory);
    }
    throw new DownloadException(ErrorCode.DIRECTORY_DOES_NOT_EXIST,saveDirectory);
  }
  File candidateFile=new File(saveDirectory,fileName);
  try {
    if (!FileUtils.isReallyParent(saveDirectory,candidateFile))     throw new DownloadException(ErrorCode.SECURITY_VIOLATION,candidateFile);
  }
 catch (  IOException e) {
    throw new DownloadException(ErrorCode.FILESYSTEM_ERROR,candidateFile);
  }
  if (!FileUtils.setWriteable(saveDirectory))   throw new DownloadException(ErrorCode.DIRECTORY_NOT_WRITEABLE,saveDirectory);
  if (candidateFile.exists()) {
    if (!candidateFile.isFile() && !(this instanceof BTDownloader))     throw new DownloadException(ErrorCode.FILE_NOT_REGULAR,candidateFile);
    if (!overwrite)     throw new DownloadException(ErrorCode.FILE_ALREADY_EXISTS,candidateFile);
  }
  if (saveLocationManager.isSaveLocationTaken(candidateFile)) {
    throw new DownloadException(ErrorCode.FILE_IS_ALREADY_DOWNLOADED_TO,candidateFile);
  }
synchronized (this) {
    if (!isRelocatable())     throw new DownloadException(ErrorCode.FILE_ALREADY_SAVED,candidateFile);
    this.saveFile=candidateFile;
  }
}