Symfony version(s) affected

5.4-6.1

Description

Not that important a bug, but the ServiceSubscriberTrait only works in combintation with PHP8.0 attributes, so using the old @required annotation is a bit weird, instead the #[Required] attribute should be used.

How to reproduce

See https://github.com/symfony/symfony/blob/v5.4.6/src/Symfony/Contracts/Service/ServiceSubscriberTrait.php#L101

Possible Solution

Use attribute instead

Additional Context

Not really an issue but also not a feature request. not sure what I should have selected instead. Personally, I thought bug was the best choice.