Error Symfony service container

This repository for issue Symfony: symfony/symfony#50417

Reproduce

Clone:

git clone https://github.com/Myks92/symfony-service-container.git

Install:

composer install

Run Debug container:

php bin/console debug:container

Result:

 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------------------- 
  Service ID                                                                   Class name                                                                              
 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------------------- 
  App\Auth\Command                                                             App\Auth\Command 

App\Auth\Command - is folder!