Program: 58001
Project: 58001
Buggy source:
@Override public boolean onCommand(CommandCaller caller,String[] args){
  PlotPlayer plr=(PlotPlayer)caller.getSuperCaller();
  ArrayList<Plot> plots=new ArrayList<>();
  UUID user=UUIDHandler.getUUID(args[0]);
  if (user != null) {
    plots.addAll(PS.get().getPlots(user));
  }
 else   if (PS.get().isPlotWorld(args[0])) {
    plots.addAll(PS.get().getPlots(args[0]).values());
  }
 else {
    Plot plot=MainUtil.getPlotFromString(plr,args[0],true);
    if (plot == null) {
      return false;
    }
    plots.add(plot);
  }
  if (plots.size() == 0) {
    sendMessage(plr,C.FOUND_NO_PLOTS);
    return false;
  }
  int index=0;
  if (args.length == 2) {
    try {
      index=Integer.parseInt(args[1]) - 1;
      if (index < 0 || index >= plots.size()) {
        sendMessage(plr,C.NOT_VALID_NUMBER,"String_Node_Str" + plots.size() + "String_Node_Str");
        sendMessage(plr,C.COMMAND_SYNTAX,"String_Node_Str" + args[0] + "String_Node_Str");
        return false;
      }
    }
 catch (    Exception e) {
      sendMessage(plr,C.NOT_VALID_NUMBER,"String_Node_Str" + plots.size() + "String_Node_Str");
      sendMessage(plr,C.COMMAND_SYNTAX,"String_Node_Str" + args[0] + "String_Node_Str");
      return false;
    }
  }
  Plot plot=plots.get(index);
  if (!plot.hasOwner()) {
    if (!Permissions.hasPermission(plr,"String_Node_Str")) {
      sendMessage(plr,C.NO_PERMISSION,"String_Node_Str");
      return false;
    }
  }
 else   if (plot.isOwner(plr.getUUID())) {
    if (!Permissions.hasPermission(plr,"String_Node_Str") && !Permissions.hasPermission(plr,"String_Node_Str")) {
      sendMessage(plr,C.NO_PERMISSION,"String_Node_Str");
      return false;
    }
  }
 else   if (plot.isAdded(plr.getUUID())) {
    if (!Permissions.hasPermission(plr,"String_Node_Str")) {
      sendMessage(plr,C.NO_PERMISSION,"String_Node_Str");
      return false;
    }
  }
 else {
    if (!Permissions.hasPermission(plr,"String_Node_Str")) {
      sendMessage(plr,C.NO_PERMISSION,"String_Node_Str");
      return false;
    }
  }
  MainUtil.teleportPlayer(plr,plr.getLocation(),plots.get(index));
  return true;
}

Fixed version (ground truth):
@Override public boolean onCommand(CommandCaller caller,String[] args){
  PlotPlayer plr=(PlotPlayer)caller.getSuperCaller();
  ArrayList<Plot> plots=new ArrayList<>();
  UUID user=UUIDHandler.getUUID(args[0],null);
  if (user != null) {
    plots.addAll(PS.get().getPlots(user));
  }
 else   if (PS.get().isPlotWorld(args[0])) {
    plots.addAll(PS.get().getPlots(args[0]).values());
  }
 else {
    Plot plot=MainUtil.getPlotFromString(plr,args[0],true);
    if (plot == null) {
      return false;
    }
    plots.add(plot);
  }
  if (plots.size() == 0) {
    sendMessage(plr,C.FOUND_NO_PLOTS);
    return false;
  }
  int index=0;
  if (args.length == 2) {
    try {
      index=Integer.parseInt(args[1]) - 1;
      if (index < 0 || index >= plots.size()) {
        sendMessage(plr,C.NOT_VALID_NUMBER,"String_Node_Str" + plots.size() + "String_Node_Str");
        sendMessage(plr,C.COMMAND_SYNTAX,"String_Node_Str" + args[0] + "String_Node_Str");
        return false;
      }
    }
 catch (    Exception e) {
      sendMessage(plr,C.NOT_VALID_NUMBER,"String_Node_Str" + plots.size() + "String_Node_Str");
      sendMessage(plr,C.COMMAND_SYNTAX,"String_Node_Str" + args[0] + "String_Node_Str");
      return false;
    }
  }
  Plot plot=plots.get(index);
  if (!plot.hasOwner()) {
    if (!Permissions.hasPermission(plr,"String_Node_Str")) {
      sendMessage(plr,C.NO_PERMISSION,"String_Node_Str");
      return false;
    }
  }
 else   if (plot.isOwner(plr.getUUID())) {
    if (!Permissions.hasPermission(plr,"String_Node_Str") && !Permissions.hasPermission(plr,"String_Node_Str")) {
      sendMessage(plr,C.NO_PERMISSION,"String_Node_Str");
      return false;
    }
  }
 else   if (plot.isAdded(plr.getUUID())) {
    if (!Permissions.hasPermission(plr,"String_Node_Str")) {
      sendMessage(plr,C.NO_PERMISSION,"String_Node_Str");
      return false;
    }
  }
 else {
    if (!Permissions.hasPermission(plr,"String_Node_Str")) {
      sendMessage(plr,C.NO_PERMISSION,"String_Node_Str");
      return false;
    }
  }
  MainUtil.teleportPlayer(plr,plr.getLocation(),plots.get(index));
  return true;
}