Symfony version(s) affected: 4.2.0 and 4.1.8

Description

I have two routes, one without slash, one with the slash, and with 4.2.0 and 4.1.8, there is a redirect from the route with the slash to the route without the slash, causing infinite redirect loop between the two (obviously because the no-slash route redirects back to slash route). #29380 also does not fix the issue.

This works fine on Symfony 4.1.7 and latest 3.4, i.e. no redirect happens from slash route to no-slash route.

How to reproduce

The following routes cause the problem:

test_route_no_slash:
    path: /foo
    methods: [GET]
    defaults:
        _controller: "Symfony\\Bundle\\FrameworkBundle\\Controller\\RedirectController::redirectAction"
        route: test_route
        permanent: true

test_route:
    path: /foo/
    methods: [GET]
    defaults:
        _controller: "App\\Controller\\FooController"

Reproducer is available at https://github.com/emodric/sf_route_redirect_bug

Start the server and open /foo to get the infinite redirects.