Program: 5064
Project: 5064
Buggy source:
/** 
 * @requires If isPush, "GIV " was just read from s.Otherwise, "GET " was just read from s.
 * @effects  Transfers the file over s <i>in the foreground</i>.Throws IOException if the handshake failed.
 */
public HTTPManager(Socket s,MessageRouter router,Acceptor acceptor,ActivityCallback callback,boolean isPush) throws IOException {
  _socket=s;
  String command=null;
  FileManager fm=FileManager.instance();
  try {
    _socket.setSoTimeout(SettingsManager.instance().getTimeout());
    try {
      _istream=_socket.getInputStream();
    }
 catch (    Exception e) {
      throw new IOException();
    }
    _br=new ByteReader(_istream);
    command=_br.readLine();
    if (command == null)     throw new IOException();
  }
 catch (  IOException e) {
    throw e;
  }
  try {
    if (!isPush) {
      String parse[]=HTTPUtil.stringSplit(command,'/');
      if (parse.length != 4)       throw new IOException();
      if (!parse[0].equals("String_Node_Str"))       throw new IOException();
      _filename=parse[2].substring(0,parse[2].lastIndexOf("String_Node_Str") - 1);
      _index=java.lang.Integer.parseInt(parse[1]);
      readRange();
      while (HTTPUploader.getUploadCount() >= SettingsManager.instance().getMaxUploads()) {
        if (!HTTPUploader.checkForLowPriorityUpload(userAgent)) {
          HTTPUploader.doLimitReached(s);
          return;
        }
      }
      HTTPUploader uploader;
      uploader=new HTTPUploader(s,_filename,_index,callback,_uploadBegin,_uploadEnd);
      uploader.setUserAgent(userAgent);
      Thread.currentThread().setName("String_Node_Str");
      uploader.run();
    }
 else {
      String next=_br.readLine();
      if (next == null || (!next.equals("String_Node_Str"))) {
        throw new IOException();
      }
      int i=command.indexOf("String_Node_Str");
      _index=Integer.parseInt(command.substring(0,i));
      int j=command.indexOf("String_Node_Str",i);
      byte[] guid=GUID.fromHexString(command.substring(i + 1,j));
      _filename=command.substring(j + 1);
      HTTPDownloader downloader;
      downloader=new HTTPDownloader(s,_filename,_index,guid,router,acceptor,callback);
      Thread.currentThread().setName("String_Node_Str");
      downloader.run();
    }
  }
 catch (  IndexOutOfBoundsException e) {
    throw new IOException();
  }
catch (  NumberFormatException e) {
    throw new IOException();
  }
catch (  IllegalArgumentException e) {
    throw new IOException();
  }
catch (  IllegalAccessException e) {
    throw new IOException();
  }
}

Fixed version (ground truth):
/** 
 * @requires If isPush, "GIV " was just read from s.Otherwise, "GET " was just read from s.
 * @effects  Transfers the file over s <i>in the foreground</i>.Throws IOException if the handshake failed.
 */
public HTTPManager(Socket s,MessageRouter router,Acceptor acceptor,ActivityCallback callback,boolean isPush) throws IOException {
  _socket=s;
  String command=null;
  FileManager fm=FileManager.instance();
  try {
    _socket.setSoTimeout(SettingsManager.instance().getTimeout());
    try {
      _istream=_socket.getInputStream();
    }
 catch (    Exception e) {
      throw new IOException();
    }
    _br=new ByteReader(_istream);
    command=_br.readLine();
    if (command == null)     throw new IOException();
  }
 catch (  IOException e) {
    throw e;
  }
  try {
    if (!isPush) {
      String parse[]=HTTPUtil.stringSplit(command,'/');
      if (parse.length != 4)       throw new IOException();
      if (!parse[0].equals("String_Node_Str"))       throw new IOException();
      _filename=parse[2].substring(0,parse[2].lastIndexOf("String_Node_Str") - 1);
      _index=java.lang.Integer.parseInt(parse[1]);
      readRange();
      while (HTTPUploader.getUploadCount() >= SettingsManager.instance().getMaxUploads()) {
        if (!HTTPUploader.checkForLowPriorityUpload(userAgent)) {
          HTTPUploader.doLimitReached(s);
          return;
        }
      }
      HTTPUploader uploader;
      uploader=new HTTPUploader(s,_filename,_index,callback,_uploadBegin,_uploadEnd);
      uploader.setUserAgent(userAgent);
      Thread.currentThread().setName("String_Node_Str");
      uploader.run();
    }
 else {
      String next=_br.readLine();
      if (next == null || (!next.equals("String_Node_Str"))) {
        throw new IOException();
      }
      int i=command.indexOf("String_Node_Str");
      _index=Integer.parseInt(command.substring(0,i));
      int j=command.indexOf("String_Node_Str",i);
      byte[] guid=GUID.fromHexString(command.substring(i + 1,j));
      _filename=command.substring(j + 1);
      s.setSoTimeout(0);
      HTTPDownloader downloader;
      downloader=new HTTPDownloader(s,_filename,_index,guid,router,acceptor,callback);
      Thread.currentThread().setName("String_Node_Str");
      downloader.run();
    }
  }
 catch (  IndexOutOfBoundsException e) {
    throw new IOException();
  }
catch (  NumberFormatException e) {
    throw new IOException();
  }
catch (  IllegalArgumentException e) {
    throw new IOException();
  }
catch (  IllegalAccessException e) {
    throw new IOException();
  }
}