Program: 155981
Project: 155981
Buggy source:
@Override protected Object decode(Channel channel,SocketAddress remoteAddress,Object msg) throws Exception {
  ChannelBuffer buf=(ChannelBuffer)msg;
  int protocol=buf.readUnsignedByte();
  buf.readUnsignedByte();
  int index=buf.readUnsignedShort();
  int type=buf.readUnsignedShort();
  buf.readUnsignedShort();
  buf.readUnsignedShort();
  buf.readUnsignedShort();
  long id=buf.readUnsignedInt();
  buf.readUnsignedInt();
  Position position=new Position();
  position.setProtocol(getProtocolName());
  position.set(Position.KEY_INDEX,index);
  position.setValid(true);
  DeviceSession deviceSession=getDeviceSession(channel,remoteAddress,String.valueOf(id));
  if (deviceSession == null) {
    return null;
  }
  position.setDeviceId(deviceSession.getDeviceId());
  if (protocol == 0x01 && (type == MSG_COMPACT || type == MSG_FULL)) {
    buf.readUnsignedShort();
    buf.readUnsignedShort();
    position.setLatitude(buf.readUnsignedInt() * 0.0000001);
    position.setLongitude(buf.readUnsignedInt() * 0.0000001);
    position.set(Position.KEY_RSSI,buf.readUnsignedShort());
    position.set(Position.KEY_SATELLITES,buf.readUnsignedShort());
    position.set(Position.KEY_SATELLITES_VISIBLE,buf.readUnsignedShort());
    position.set("String_Node_Str",buf.readUnsignedShort());
    position.setSpeed(buf.readUnsignedShort() * 0.194384);
    position.setCourse((double)buf.readUnsignedShort());
    position.set(Position.KEY_ODOMETER,buf.readUnsignedInt());
    position.set(Position.KEY_BATTERY,buf.readUnsignedShort());
    position.set(Position.KEY_CHARGE,buf.readUnsignedShort());
    position.setTime(new Date(buf.readUnsignedInt() * 1000));
    return position;
  }
 else   if (protocol == 0x80) {
    if (channel != null) {
      channel.write(ChannelBuffers.copiedBuffer("String_Node_Str" + index,StandardCharsets.US_ASCII));
    }
    String sentence=buf.toString(StandardCharsets.US_ASCII);
    Pattern pattern=Pattern.compile("String_Node_Str");
    Matcher matcher=pattern.matcher(sentence);
    if (!matcher.find()) {
      return null;
    }
    position.setLatitude(Double.parseDouble(matcher.group(1)));
    position.setLongitude(Double.parseDouble(matcher.group(2)));
    pattern=Pattern.compile("String_Node_Str");
    matcher=pattern.matcher(sentence);
    if (matcher.find()) {
      for (int i=0; i < DIRECTIONS.length; i++) {
        if (matcher.group(1).equals(DIRECTIONS[i])) {
          position.setCourse(i * 45.0);
          break;
        }
      }
      position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(matcher.group(2))));
    }
    pattern=Pattern.compile("String_Node_Str");
    matcher=pattern.matcher(sentence);
    if (!matcher.find()) {
      return null;
    }
    DateFormat dateFormat=new SimpleDateFormat("String_Node_Str",Locale.ENGLISH);
    position.setTime(DateUtil.correctYear(dateFormat.parse(matcher.group(1) + "String_Node_Str" + Calendar.getInstance().get(Calendar.YEAR))));
    if (sentence.contains("String_Node_Str")) {
      position.set(Position.KEY_IGNITION,true);
    }
 else     if (sentence.contains("String_Node_Str")) {
      position.set(Position.KEY_IGNITION,false);
    }
    return position;
  }
  return null;
}

Fixed version (ground truth):
@Override protected Object decode(Channel channel,SocketAddress remoteAddress,Object msg) throws Exception {
  ChannelBuffer buf=(ChannelBuffer)msg;
  int protocol=buf.readUnsignedByte();
  buf.readUnsignedByte();
  int index=buf.readUnsignedShort();
  int type=buf.readUnsignedShort();
  buf.readUnsignedShort();
  buf.readUnsignedShort();
  buf.readUnsignedShort();
  long id=buf.readUnsignedInt();
  buf.readUnsignedInt();
  Position position=new Position();
  position.setProtocol(getProtocolName());
  position.set(Position.KEY_INDEX,index);
  position.setValid(true);
  DeviceSession deviceSession=getDeviceSession(channel,remoteAddress,String.valueOf(id));
  if (deviceSession == null) {
    return null;
  }
  position.setDeviceId(deviceSession.getDeviceId());
  if (protocol == 0x01 && (type == MSG_COMPACT || type == MSG_FULL)) {
    buf.readUnsignedShort();
    buf.readUnsignedShort();
    position.setLatitude(buf.readUnsignedInt() * 0.0000001);
    position.setLongitude(buf.readUnsignedInt() * 0.0000001);
    position.set(Position.KEY_RSSI,buf.readUnsignedShort());
    position.set(Position.KEY_SATELLITES,buf.readUnsignedShort());
    position.set(Position.KEY_SATELLITES_VISIBLE,buf.readUnsignedShort());
    position.set("String_Node_Str",buf.readUnsignedShort());
    position.setSpeed(buf.readUnsignedShort() * 0.194384);
    position.setCourse(buf.readUnsignedShort());
    position.set(Position.KEY_ODOMETER,buf.readUnsignedInt());
    position.set(Position.KEY_BATTERY,buf.readUnsignedShort());
    position.set(Position.KEY_CHARGE,buf.readUnsignedShort());
    position.setTime(new Date(buf.readUnsignedInt() * 1000));
    return position;
  }
 else   if (protocol == 0x80) {
    if (channel != null) {
      channel.write(ChannelBuffers.copiedBuffer("String_Node_Str" + index,StandardCharsets.US_ASCII));
    }
    String sentence=buf.toString(StandardCharsets.US_ASCII);
    Pattern pattern=Pattern.compile("String_Node_Str");
    Matcher matcher=pattern.matcher(sentence);
    if (!matcher.find()) {
      return null;
    }
    position.setLatitude(Double.parseDouble(matcher.group(1)));
    position.setLongitude(Double.parseDouble(matcher.group(2)));
    pattern=Pattern.compile("String_Node_Str");
    matcher=pattern.matcher(sentence);
    if (matcher.find()) {
      for (int i=0; i < DIRECTIONS.length; i++) {
        if (matcher.group(1).equals(DIRECTIONS[i])) {
          position.setCourse(i * 45.0);
          break;
        }
      }
      position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(matcher.group(2))));
    }
    pattern=Pattern.compile("String_Node_Str");
    matcher=pattern.matcher(sentence);
    if (!matcher.find()) {
      return null;
    }
    DateFormat dateFormat=new SimpleDateFormat("String_Node_Str",Locale.ENGLISH);
    position.setTime(DateUtil.correctYear(dateFormat.parse(matcher.group(1) + "String_Node_Str" + Calendar.getInstance().get(Calendar.YEAR))));
    if (sentence.contains("String_Node_Str")) {
      position.set(Position.KEY_IGNITION,true);
    }
 else     if (sentence.contains("String_Node_Str")) {
      position.set(Position.KEY_IGNITION,false);
    }
    return position;
  }
  return null;
}