[HttpFoundation] Type mismatch between Request::$requestFactory and Request::setFactory()

[longwave]

Symfony version(s) affected

7.0.0

Description

Request declares $requestFactory as a closure:

    protected static ?\Closure $requestFactory = null;

::setFactory() declares its argument as a callable:

    public static function setFactory(?callable $callable): void
    {
        self::$requestFactory = $callable;
    }

How to reproduce

Drupal calls ::setFactory() with a callable that isn't a closure:

$request_factory = new TrustedHostsRequestFactory('localhost');
Request::setFactory([$request_factory, 'createRequest']);

In Symfony 7 this results in

PHP Fatal error:  Uncaught TypeError: Cannot assign array to property Symfony\Component\HttpFoundation\Request::$requestFactory of type ?Closure

Possible Solution

Either convert the callable to a closure internally with Closure::fromCallable() or change the typehint of the setFactory() argument to \Closure, unsure which is the preferred solution here.

Additional Context

No response