👍

One more thing to note. If such a yml is provided to the loader:

Acme\MyObj:attributes:foo:groups:'group1'

Invalid argument supplied for foreach() warning raises, because it isnot ensured here.

If you think this should be in another PR, than sorry. :)

Good catch@paradajozsef, I've added a separate commit in this PR.

👍

This is more a bug fix than a new feature ;-)

👍 debugging is easier with this kind of check 😄

We should include the name of the file and probably some other related information (class name, property or something like that) to make it easier to spot the place where the configuration is wrong.

I agree with@xabbuh

Status: Need Review

@xabbuh@fabpot done

Thank you@dunglas.