Extensions with macro generics over abstracts

[ncannasse]

We used to have an extension in the form:

class Ext {
    public static function find<T>( it : Iterable<T>, f : T -> Bool ) : Null<T> { ... }
}

With 4.0-preview 4, these does not work anymore with types such as hxbit.Proxy<Array<Int>> which are macro generics evaluating to abstract hxbit.ArrayProxy<T>.

Is that intended or an unexpected regression?

[Simn]

That's #5924, so it's not working anymore as intended. Note that this has nothing to do with macro generics, it's about abstracts and their @:to/@:from casts.