Program: 57987
Project: 57987
Buggy source:
@Override public int handle(PlotPlayer plr,String input){
  String[] parts=input.split("String_Node_Str");
  String[] args;
  String label;
  if (parts.length == 1) {
    label=null;
    args=new String[0];
  }
 else {
    label=parts[1];
    args=new String[parts.length - 2];
    System.arraycopy(parts,2,args,0,args.length);
  }
  Command<PlotPlayer> cmd=null;
  cmd=this.commands.get(label);
  if (cmd == null) {
    MainUtil.sendMessage(plr,C.NOT_VALID_SUBCOMMAND);
{
      ArrayList<Command<PlotPlayer>> cmds=getCommands();
      cmd=new StringComparison<Command<PlotPlayer>>(label,cmds).getMatchObject();
      MainUtil.sendMessage(plr,C.DID_YOU_MEAN,cmd.getUsage().replaceAll("String_Node_Str",label));
    }
    return CommandHandlingOutput.NOT_FOUND;
  }
  if (!cmd.getRequiredType().allows(plr)) {
    if (ConsolePlayer.isConsole(plr)) {
      MainUtil.sendMessage(plr,C.IS_CONSOLE);
    }
 else {
      MainUtil.sendMessage(plr,C.NOT_CONSOLE);
    }
    return CommandHandlingOutput.CALLER_OF_WRONG_TYPE;
  }
  if (!plr.hasPermission(cmd.getPermission())) {
    MainUtil.sendMessage(plr,C.NO_PERMISSION,cmd.getPermission());
    return CommandHandlingOutput.NOT_PERMITTED;
  }
  Argument<?>[] requiredArguments=cmd.getRequiredArguments();
  if (requiredArguments != null && requiredArguments.length > 0) {
    boolean success=true;
    if (args.length < requiredArguments.length) {
      success=false;
    }
 else {
      for (int i=0; i < requiredArguments.length; i++) {
        if (requiredArguments[i].parse(args[i]) == null) {
          success=false;
          break;
        }
      }
    }
    if (!success) {
      C.COMMAND_SYNTAX.send(plr,cmd.getUsage());
      return CommandHandlingOutput.WRONG_USAGE;
    }
  }
  try {
    boolean result=cmd.onCommand(plr,args);
    if (!result) {
      String usage=cmd.getUsage();
      if (usage != null && !usage.isEmpty()) {
        MainUtil.sendMessage(plr,usage);
      }
      return CommandHandlingOutput.WRONG_USAGE;
    }
  }
 catch (  final Throwable t) {
    t.printStackTrace();
    return CommandHandlingOutput.ERROR;
  }
  return CommandHandlingOutput.SUCCESS;
}

Fixed version (ground truth):
@Override public int handle(PlotPlayer plr,String input){
  String[] parts=input.split("String_Node_Str");
  String[] args;
  String label;
  if (parts.length == 1) {
    label=null;
    args=new String[0];
  }
 else {
    label=parts[1];
    args=new String[parts.length - 2];
    System.arraycopy(parts,2,args,0,args.length);
  }
  Command<PlotPlayer> cmd=null;
  cmd=this.commands.get(label);
  if (cmd == null) {
    MainUtil.sendMessage(plr,C.NOT_VALID_SUBCOMMAND);
{
      ArrayList<Command<PlotPlayer>> cmds=getCommands();
      cmd=new StringComparison<Command<PlotPlayer>>(label,cmds).getMatchObject();
      if (cmd == null) {
        MainUtil.sendMessage(plr,C.DID_YOU_MEAN,"String_Node_Str");
      }
 else {
        MainUtil.sendMessage(plr,C.DID_YOU_MEAN,cmd.getUsage().replaceAll("String_Node_Str",label));
      }
    }
    return CommandHandlingOutput.NOT_FOUND;
  }
  if (!cmd.getRequiredType().allows(plr)) {
    if (ConsolePlayer.isConsole(plr)) {
      MainUtil.sendMessage(plr,C.IS_CONSOLE);
    }
 else {
      MainUtil.sendMessage(plr,C.NOT_CONSOLE);
    }
    return CommandHandlingOutput.CALLER_OF_WRONG_TYPE;
  }
  if (!plr.hasPermission(cmd.getPermission())) {
    MainUtil.sendMessage(plr,C.NO_PERMISSION,cmd.getPermission());
    return CommandHandlingOutput.NOT_PERMITTED;
  }
  Argument<?>[] requiredArguments=cmd.getRequiredArguments();
  if (requiredArguments != null && requiredArguments.length > 0) {
    boolean success=true;
    if (args.length < requiredArguments.length) {
      success=false;
    }
 else {
      for (int i=0; i < requiredArguments.length; i++) {
        if (requiredArguments[i].parse(args[i]) == null) {
          success=false;
          break;
        }
      }
    }
    if (!success) {
      C.COMMAND_SYNTAX.send(plr,cmd.getUsage());
      return CommandHandlingOutput.WRONG_USAGE;
    }
  }
  try {
    boolean result=cmd.onCommand(plr,args);
    if (!result) {
      String usage=cmd.getUsage();
      if (usage != null && !usage.isEmpty()) {
        MainUtil.sendMessage(plr,usage);
      }
      return CommandHandlingOutput.WRONG_USAGE;
    }
  }
 catch (  final Throwable t) {
    t.printStackTrace();
    return CommandHandlingOutput.ERROR;
  }
  return CommandHandlingOutput.SUCCESS;
}