php – Symfony安全基本身份验证

从symfony book http://symfony.com/doc/current/book/security.html#security-authorization我试图建立基本的http身份验证.

security.yml文件如下所示：

security:
    providers:
        in_memory:
            memory: ~

    firewalls:
        dev:
            pattern: ^/(_(profiler|wdt|error)|css|images|js)/
            security: false

        default:
            anonymous: ~
            http_basic: ~

        access_control:
            - { path: ^/login,roles: ROLE_USER }

但是只要我补充一下

access_control:
        - { path: ^/login,roles: ROLE_USER }

我得到一个symfony错误说：

InvalidConfigurationException in ArrayNode.PHP line 309:
Unrecognized option "0" under "security.firewalls.access_control"

我究竟做错了什么？该怎么做才能修复它？

security:
    providers:
        in_memory:
            memory: ~

    firewalls:
        dev:
            pattern: ^/(_(profiler|wdt|error)|css|images|js)/
            security: false

        default:
            anonymous: ~
            http_basic: ~

    access_control:
        - { path: ^/login,roles: ROLE_USER }