Program: 153955
Project: 153955
Buggy source:
public boolean onCommand(CommandSender sender,Command cmd,String commandLabel,String args[]){
  String prefix=cmd.getName();
  Player player=(Player)sender;
  if (prefix.equalsIgnoreCase("String_Node_Str")) {
    if (args.length > 0) {
      String name=args[0];
      if (permissions.world(player)) {
        for (        World world : getServer().getWorlds().toArray(new World[0])) {
          if (name.equalsIgnoreCase(config.getAliasFromWorld(world))) {
            sendPlayerList(player,"String_Node_Str" + world.getName() + "String_Node_Str"+ world.getPlayers().size()+ "String_Node_Str"+ getServer().getMaxPlayers()+ "String_Node_Str",world.getPlayers());
            return true;
          }
        }
      }
      if (permissions.player(player)) {
        for (        World world : getServer().getWorlds().toArray(new World[0])) {
          for (          Player playerInfo : world.getPlayers().toArray(new Player[0])) {
            if (playerInfo.getName().equalsIgnoreCase(name)) {
              Location loc=playerInfo.getLocation();
              Util.sendMessage(player,"String_Node_Str" + playerInfo.getName());
              Util.sendMessage(player,"String_Node_Str" + playerInfo.getAddress().getAddress().getHostAddress().toString());
              Util.sendMessage(player,"String_Node_Str" + loc.getX() + "String_Node_Str"+ loc.getY()+ "String_Node_Str"+ loc.getZ());
              Util.sendMessage(player,"String_Node_Str" + config.getAliasFromWorld(playerInfo.getWorld()));
              Util.sendMessage(player,"String_Node_Str" + playerInfo.getHealth() + "String_Node_Str");
              Util.sendMessage(player,"String_Node_Str" + (player.isOp() ? "String_Node_Str" : "String_Node_Str"));
              return true;
            }
          }
        }
      }
    }
 else     if (permissions.list(player)) {
      List<Player> players=new ArrayList<Player>();
      for (      World world : getServer().getWorlds().toArray(new World[0]))       players.addAll(world.getPlayers());
      sendPlayerList(player,"String_Node_Str" + players.size() + "String_Node_Str"+ getServer().getMaxPlayers()+ "String_Node_Str",players);
      return true;
    }
  }
  return false;
}

Fixed version (ground truth):
public boolean onCommand(CommandSender sender,Command cmd,String commandLabel,String args[]){
  String prefix=cmd.getName();
  Player player=(Player)sender;
  if (prefix.equalsIgnoreCase("String_Node_Str")) {
    if (args.length > 0) {
      String name=args[0];
      if (permissions.world(player)) {
        for (        World world : getServer().getWorlds().toArray(new World[0])) {
          if (name.equalsIgnoreCase(config.getAliasFromWorld(world))) {
            sendPlayerList(player,"String_Node_Str" + world.getName() + "String_Node_Str"+ world.getPlayers().size()+ "String_Node_Str"+ getServer().getMaxPlayers()+ "String_Node_Str",world.getPlayers());
            return true;
          }
        }
      }
      if (permissions.player(player)) {
        for (        World world : getServer().getWorlds().toArray(new World[0])) {
          for (          Player playerInfo : world.getPlayers().toArray(new Player[0])) {
            if (playerInfo.getName().equalsIgnoreCase(name)) {
              Location loc=Util.getSimpleLocation(playerInfo.getLocation());
              Util.sendMessage(player,"String_Node_Str" + playerInfo.getName());
              Util.sendMessage(player,"String_Node_Str" + playerInfo.getAddress().getAddress().getHostAddress().toString());
              Util.sendMessage(player,"String_Node_Str" + loc.getX() + "String_Node_Str"+ loc.getY()+ "String_Node_Str"+ loc.getZ());
              Util.sendMessage(player,"String_Node_Str" + config.getAliasFromWorld(playerInfo.getWorld()));
              Util.sendMessage(player,"String_Node_Str" + playerInfo.getHealth() + "String_Node_Str");
              Util.sendMessage(player,"String_Node_Str" + permissions.getPrefix(player) + permissions.getGroup(player));
              Util.sendMessage(player,"String_Node_Str" + (player.isOp() ? "String_Node_Str" : "String_Node_Str"));
              return true;
            }
          }
        }
      }
    }
 else     if (permissions.list(player)) {
      List<Player> players=new ArrayList<Player>();
      for (      World world : getServer().getWorlds().toArray(new World[0]))       players.addAll(world.getPlayers());
      sendPlayerList(player,"String_Node_Str" + players.size() + "String_Node_Str"+ getServer().getMaxPlayers()+ "String_Node_Str",players);
      return true;
    }
  }
  return false;
}