                    if (array_keys($keys) !== $keys) $this->error('Indices for list are not uniform');
                }
                return $var;
            case (self::MIXED):
                return $var;
            default:
                $this->errorInconsistent(get_class($this), $type);
        }
        $this->errorGeneric($var, $type);
    }
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.