Program: 19034
Project: 19034
Buggy source:
static ReturnStatus handleCommandString(Player player,String command,RunMode mode) throws SMSException {
  command=command.replace("String_Node_Str","String_Node_Str" + player.getLocation().getBlockX());
  command=command.replace("String_Node_Str","String_Node_Str" + player.getLocation().getBlockY());
  command=command.replace("String_Node_Str","String_Node_Str" + player.getLocation().getBlockZ());
  command=command.replace("String_Node_Str",player.getName());
  command=command.replace("String_Node_Str",player.getName());
  command=command.replace("String_Node_Str",player.getWorld().getName());
  ItemStack stack=player.getItemInHand();
  command=command.replace("String_Node_Str",stack != null ? "String_Node_Str" + stack.getTypeId() : "String_Node_Str");
  Scanner scanner=new Scanner(command);
  ReturnStatus rs=ReturnStatus.CMD_OK;
  while (scanner.hasNext()) {
    ParsedCommand cmd=new ParsedCommand(player,scanner);
    if (mode == RunMode.EXECUTE) {
      rs=execute(player,cmd);
    }
 else     if (mode == RunMode.CHECK_PERMS) {
      if (cmd.isElevated() && !PermissionsUtils.isAllowedTo(player,"String_Node_Str"))       return ReturnStatus.NO_PERMS;
      if (!cmd.getCosts().isEmpty() && !PermissionsUtils.isAllowedTo(player,"String_Node_Str"))       return ReturnStatus.NO_PERMS;
    }
 else {
      throw new IllegalArgumentException("String_Node_Str");
    }
    if (cmd.getStatus() == ReturnStatus.CMD_STOPPED || cmd.getStatus() == ReturnStatus.MACRO_STOPPED) {
      return cmd.getStatus();
    }
  }
  return rs;
}

Fixed version (ground truth):
static ReturnStatus handleCommandString(Player player,String command,RunMode mode) throws SMSException {
  command=command.replace("String_Node_Str","String_Node_Str" + player.getLocation().getBlockX());
  command=command.replace("String_Node_Str","String_Node_Str" + player.getLocation().getBlockY());
  command=command.replace("String_Node_Str","String_Node_Str" + player.getLocation().getBlockZ());
  command=command.replace("String_Node_Str",player.getName());
  command=command.replace("String_Node_Str",player.getName());
  command=command.replace("String_Node_Str",player.getWorld().getName());
  ItemStack stack=player.getItemInHand();
  command=command.replace("String_Node_Str",stack != null ? "String_Node_Str" + stack.getTypeId() : "String_Node_Str");
  Scanner scanner=new Scanner(command);
  ReturnStatus rs=ReturnStatus.CMD_OK;
  while (scanner.hasNext()) {
    ParsedCommand cmd=new ParsedCommand(player,scanner);
    if (mode == RunMode.EXECUTE) {
      rs=execute(player,cmd);
      if (rs == ReturnStatus.CMD_RESTRICTED || rs == ReturnStatus.CANT_AFFORD)       continue;
    }
 else     if (mode == RunMode.CHECK_PERMS) {
      if (cmd.isElevated() && !PermissionsUtils.isAllowedTo(player,"String_Node_Str"))       return ReturnStatus.NO_PERMS;
      if (!cmd.getCosts().isEmpty() && !PermissionsUtils.isAllowedTo(player,"String_Node_Str"))       return ReturnStatus.NO_PERMS;
    }
 else {
      throw new IllegalArgumentException("String_Node_Str");
    }
    if (cmd.getStatus() == ReturnStatus.CMD_STOPPED || cmd.getStatus() == ReturnStatus.MACRO_STOPPED) {
      return cmd.getStatus();
    }
  }
  return rs;
}