Symfony version(s) affected

6.x, 7.x

Description

I am receiving the following error:

Error {#2549
  #message: "Typed property Symfony\Component\Config\Loader\Loader::$resolver must not be accessed before initialization"
  #code: 0
  #file: "D:\inetroot\websites\demo\vendor\symfony\config\Loader\Loader.php"
  #line: 60
}

The line in question is: $loader = null === $this->resolver ? false : $this->resolver->resolve($resource, $type);, however, the defined property is protected LoaderResolverInterface $resolver; (line 35).

How to reproduce

class MyBundle extends AbstractBundle
{
    public function configure(DefinitionConfigurator $definition): void
    {
        $definition->import(dirname(__DIR__) . '/config/*.yaml', 'yaml');
    }
}

Please disregard the fact that I'm attempting to load YAML in the below reproduction code. Apparently there isn't built-in support for loading YAML configuration in bundles...

Possible Solution

I suggest the either of the following changes:

1. Symfony 6.x / 7.x : $loader = isset($this->resolver) ? $this->resolver->resolve($resource, $type) : false;
2. Symfony 7.x: protected ?LoaderResolverInterface $resolver and public function getResolver(): ?LoaderResolverInterface

Additional Context

No response