Program: 97828
Project: 97828
Buggy source:
private void sitOn(final SnipeData v){
  final Chunk _targetChunk=this.getWorld().getChunkAt(this.getTargetBlock().getLocation());
  final int _targetChunkX=_targetChunk.getX();
  final int _targetChunkZ=_targetChunk.getZ();
  double _range=Double.MAX_VALUE;
  Entity _closest=null;
  for (int _x=_targetChunkX - 1; _x <= _targetChunkX + 1; _x++) {
    for (int _y=_targetChunkZ - 1; _y <= _targetChunkZ + 1; _y++) {
      for (      final Entity _e : this.getWorld().getChunkAt(_x,_y).getEntities()) {
        if (_e.getEntityId() == v.owner().getPlayer().getEntityId()) {
          continue;
        }
        if (jockeyType == JockeyType.NORMAL_PLAYER_ONLY || jockeyType == JockeyType.INVERSE_PLAYER_ONLY) {
          if (!(_e instanceof Player)) {
            continue;
          }
        }
        final Location _entityLocation=_e.getLocation();
        final double _entityDistance=_entityLocation.distance(v.owner().getPlayer().getLocation());
        if (_entityDistance < _range) {
          _range=_entityDistance;
          _closest=_e;
        }
      }
    }
  }
  if (_closest != null) {
    final Player _player=v.owner().getPlayer();
    final PlayerTeleportEvent _teleEvent=new PlayerTeleportEvent(_player,_player.getLocation(),_closest.getLocation(),PlayerTeleportEvent.TeleportCause.PLUGIN);
    Bukkit.getPluginManager().callEvent(_teleEvent);
    if (!_teleEvent.isCancelled()) {
      if (jockeyType == JockeyType.INVERSE_PLAYER_ONLY || jockeyType == JockeyType.INVERSE_ALL_ENTITIES) {
        _player.setPassenger(_closest);
      }
 else {
        _closest.setPassenger(_player);
        jockeydEntity=_closest;
      }
      v.sendMessage(ChatColor.GREEN + "String_Node_Str" + _closest.getEntityId());
    }
  }
 else {
    v.sendMessage(ChatColor.RED + "String_Node_Str");
  }
}

Fixed version (ground truth):
private void sitOn(final SnipeData v){
  final Chunk _targetChunk=this.getWorld().getChunkAt(this.getTargetBlock().getLocation());
  final int _targetChunkX=_targetChunk.getX();
  final int _targetChunkZ=_targetChunk.getZ();
  double _range=Double.MAX_VALUE;
  Entity _closest=null;
  for (int _x=_targetChunkX - 1; _x <= _targetChunkX + 1; _x++) {
    for (int _y=_targetChunkZ - 1; _y <= _targetChunkZ + 1; _y++) {
      for (      final Entity _e : this.getWorld().getChunkAt(_x,_y).getEntities()) {
        if (_e.getEntityId() == v.owner().getPlayer().getEntityId()) {
          continue;
        }
        if (jockeyType == JockeyType.NORMAL_PLAYER_ONLY || jockeyType == JockeyType.INVERSE_PLAYER_ONLY) {
          if (!(_e instanceof Player)) {
            continue;
          }
        }
        final Location _entityLocation=_e.getLocation();
        final double _entityDistance=_entityLocation.distance(v.owner().getPlayer().getLocation());
        if (_entityDistance < _range) {
          _range=_entityDistance;
          _closest=_e;
        }
      }
    }
  }
  if (_closest != null) {
    final Player _player=v.owner().getPlayer();
    final PlayerTeleportEvent _teleEvent=new PlayerTeleportEvent(_player,_player.getLocation(),_closest.getLocation(),PlayerTeleportEvent.TeleportCause.PLUGIN);
    Bukkit.getPluginManager().callEvent(_teleEvent);
    if (!_teleEvent.isCancelled()) {
      if (jockeyType == JockeyType.INVERSE_PLAYER_ONLY || jockeyType == JockeyType.INVERSE_ALL_ENTITIES) {
        _player.setPassenger(_closest);
      }
 else {
        _closest.setPassenger(_player);
        jockeyedEntity=_closest;
      }
      v.sendMessage(ChatColor.GREEN + "String_Node_Str" + _closest.getEntityId());
    }
  }
 else {
    v.sendMessage(ChatColor.RED + "String_Node_Str");
  }
}