Description

If the matches method of RequestMatcher is used on an attribute which is a closure it crashes.

How did we get it

On a project that is using FOS HTTP Cache, we have this configuration

fos_http_cache:
    cache_control:
        rules:
     -
                match:
                    attributes: { _controller: ^App\\Controller\\.*::.* }
                headers:
                    overwrite: true
                    cache_control: { public: true, private: false, must_revalidate: true, s_maxage: 3600 }

Everything works fine unless you are reaching a controller that is a closure.
You get a
TypeError: preg_match(): Argument #2 ($subject) must be of type string, Closure given which is to me logical.

Proposed solution

Just testing the type of attribute value and return false before crashing preg_match

This PR adds a quick unit test to enforce this.