Program: 151867
Project: 151867
Buggy source:
public void execute(Player player,String message){
  Homes homes=player.getServer().data.players.homes;
  String playerName=player.getName();
  String arguments[]=extractArguments(message);
  if (arguments.length == 0) {
    teleportHome(player);
    return;
  }
  String command=arguments[0];
  if (command.equals("String_Node_Str")) {
    usage(player);
  }
 else   if (command.equals("String_Node_Str")) {
    if (homes.get(playerName) != null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    homes.set(playerName,homes.makeHomePoint(player.position));
    player.getServer().data.save();
    player.addTMessage(Color.GRAY,"String_Node_Str");
  }
 else   if (command.equals("String_Node_Str")) {
    if (homes.get(playerName) == null) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    homes.remove(playerName);
    player.getServer().data.save();
    player.addTMessage(Color.GRAY,"String_Node_Str");
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (home.isPublic == true) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    home.isPublic=true;
    homes.set(playerName,home);
    player.getServer().data.save();
    player.addTMessage(Color.GRAY,"String_Node_Str");
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (home.isPublic == false) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    home.isPublic=false;
    homes.set(playerName,home);
    player.getServer().data.save();
    player.addTMessage(Color.GRAY,"String_Node_Str");
  }
 else   if (command.equals("String_Node_Str")) {
    List<String> list=homes.getHomesPlayerInvitedTo(playerName);
    if (list.isEmpty()) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    player.addTMessage(Color.GRAY,"String_Node_Str",join(list).trim());
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (home.isPublic) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    List<String> list=home.getPlayersInvited();
    if (list.isEmpty()) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    player.addTMessage(Color.GRAY,"String_Node_Str",join(list).trim());
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (arguments.length == 1) {
      player.addTMessage(Color.RED,"String_Node_Str");
      usage(player);
      return;
    }
    String iPlayer=arguments[1];
    Player onlineTarget=player.getServer().findPlayer(iPlayer);
    if (onlineTarget != null) {
      iPlayer=onlineTarget.getName();
    }
    if (!home.invites.contains(new NBTString(iPlayer))) {
      home.invites.add(new NBTString(iPlayer));
      player.addTMessage(Color.GRAY,"String_Node_Str",iPlayer);
      if (onlineTarget != null) {
        onlineTarget.addTMessage(Color.GRAY,"String_Node_Str",getName());
      }
    }
 else {
      player.addTMessage(Color.GRAY,"String_Node_Str");
    }
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (arguments.length == 1) {
      player.addTMessage(Color.RED,"String_Node_Str");
      usage(player);
      return;
    }
    String uiPlayer=home.getInvitedPlayer(arguments[1]);
    if (home.invites.contains(new NBTString(uiPlayer))) {
      home.invites.remove(new NBTString(uiPlayer));
      player.addTMessage(Color.GRAY,"String_Node_Str",uiPlayer);
    }
 else {
      player.addTMessage(Color.GRAY,"String_Node_Str");
    }
  }
 else {
    if (command == playerName) {
      teleportHome(player);
      return;
    }
    String target=command;
    String onlinePlayer=player.getServer().findName(target);
    if (onlinePlayer != null) {
      target=onlinePlayer;
    }
 else {
      List<String> list=homes.getHomesPlayerInvitedTo(playerName);
      for (      String p : list) {
        if (p.startsWith(target)) {
          target=p;
          break;
        }
      }
    }
    HomePoint home=homes.get(target);
    if (home == null) {
      usage(player);
      return;
    }
    if ((home.isPublic && player.getServer().findPlayer(target) != null) || home.invites.contains(new NBTString(playerName))) {
      player.teleportWithWarmup(home.position);
    }
 else {
      player.addTMessage(Color.RED,"String_Node_Str",command);
    }
  }
}

Fixed version (ground truth):
public void execute(Player player,String message){
  Homes homes=player.getServer().data.players.homes;
  String playerName=player.getName();
  String arguments[]=extractArguments(message);
  if (arguments.length == 0) {
    teleportHome(player);
    return;
  }
  String command=arguments[0];
  if (command.equals("String_Node_Str")) {
    usage(player);
  }
 else   if (command.equals("String_Node_Str")) {
    if (homes.get(playerName) != null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    homes.set(playerName,homes.makeHomePoint(player.position));
    player.getServer().data.save();
    player.addTMessage(Color.GRAY,"String_Node_Str");
  }
 else   if (command.equals("String_Node_Str")) {
    if (homes.get(playerName) == null) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    homes.remove(playerName);
    player.getServer().data.save();
    player.addTMessage(Color.GRAY,"String_Node_Str");
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (home.isPublic == true) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    home.isPublic=true;
    homes.set(playerName,home);
    player.getServer().data.save();
    player.addTMessage(Color.GRAY,"String_Node_Str");
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (home.isPublic == false) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    home.isPublic=false;
    homes.set(playerName,home);
    player.getServer().data.save();
    player.addTMessage(Color.GRAY,"String_Node_Str");
  }
 else   if (command.equals("String_Node_Str")) {
    List<String> inviteList=new LinkedList<String>();
    List<String> publicList=new LinkedList<String>();
    homes.getVisitableHomes(playerName,inviteList,publicList);
    if (inviteList.isEmpty() && publicList.isEmpty()) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    player.addTMessage(Color.GRAY,"String_Node_Str",join(publicList).trim());
    player.addTMessage(Color.GRAY,"String_Node_Str",join(inviteList).trim());
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (home.isPublic) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    List<String> list=home.getPlayersInvited();
    if (list.isEmpty()) {
      player.addTMessage(Color.GRAY,"String_Node_Str");
      return;
    }
    player.addTMessage(Color.GRAY,"String_Node_Str",join(list).trim());
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (arguments.length == 1) {
      player.addTMessage(Color.RED,"String_Node_Str");
      usage(player);
      return;
    }
    String iPlayer=arguments[1];
    Player onlineTarget=player.getServer().findPlayer(iPlayer);
    if (onlineTarget != null) {
      iPlayer=onlineTarget.getName();
    }
    if (!home.invites.contains(new NBTString(iPlayer))) {
      home.invites.add(new NBTString(iPlayer));
      player.addTMessage(Color.GRAY,"String_Node_Str",iPlayer);
      if (onlineTarget != null) {
        onlineTarget.addTMessage(Color.GRAY,"String_Node_Str",player.getName());
      }
    }
 else {
      player.addTMessage(Color.GRAY,"String_Node_Str");
    }
  }
 else   if (command.equals("String_Node_Str")) {
    HomePoint home=homes.get(playerName);
    if (home == null) {
      player.addTMessage(Color.RED,"String_Node_Str");
      return;
    }
    if (arguments.length == 1) {
      player.addTMessage(Color.RED,"String_Node_Str");
      usage(player);
      return;
    }
    String uiPlayer=home.getInvitedPlayer(arguments[1]);
    if (home.invites.contains(new NBTString(uiPlayer))) {
      home.invites.remove(new NBTString(uiPlayer));
      player.addTMessage(Color.GRAY,"String_Node_Str",uiPlayer);
    }
 else {
      player.addTMessage(Color.GRAY,"String_Node_Str");
    }
  }
 else {
    if (command.toLowerCase().equals(playerName.toLowerCase())) {
      teleportHome(player);
      return;
    }
    String target=command;
    String onlinePlayer=player.getServer().findName(target);
    if (onlinePlayer != null) {
      target=onlinePlayer;
    }
 else {
      List<String> list=homes.getHomesPlayerInvitedTo(playerName);
      for (      String p : list) {
        if (p.startsWith(target)) {
          target=p;
          break;
        }
      }
    }
    HomePoint home=homes.get(target);
    if (home == null) {
      usage(player);
      return;
    }
    if ((home.isPublic && player.getServer().findPlayer(target) != null) || home.invites.contains(new NBTString(playerName)) || target.toLowerCase().equals(playerName.toLowerCase())) {
      player.teleportWithWarmup(home.position);
    }
 else {
      player.addTMessage(Color.RED,"String_Node_Str",command);
    }
  }
}