Bug report

I am trying to type hint an abstract class in the code.

Code snippet that reproduces the problem

I am using PHPStan with --level=0 in my configuration. The part of code in question:

protected function instantiateRequestParameter(string $requestParameter): AbstractParameter
{
    /**
     * @var AbstractParameter $requestParameter
     */
    $input = $this->wrapInput($requestParameter::getParameterName());

    return new $requestParameter($input, $this->builder, $this->modelConfig);
}

Input comes from doing a foreach loop on registered parameters from config file. Each of these is an exact class which extends abstract class AbstractParameter.

The error I'm getting is:

Instantiated class Asseco\JsonQueryBuilder\RequestParameters\AbstractParameter is abstract

Once I remove the type hint, it all goes well. Can this be somehow mitigated not to show while at the same time having a type hint? I tried replacing it with interface, however in that case I am getting:

Cannot instantiate interface Asseco\JsonQueryBuilder\RequestParameters\Parameter

So in both cases it is the same. Any ideas?

Expected output

I expect it not to fail as I am never forwarding an abstract class to the method.