Type-variable references from local interface declaration

[Tagir Valeev]

Hello!

The spec draft for local interfaces and enums [1] tells that it's
illegal to refer to the enclosing method type parameter from the local
interface. Here's a simplified sample from the spec:

class Box<T> {
    static <U> Box<U> make(U val) {
        interface Checker {
            void check(U val); // compile-time error
        }
        return null;
    }
}

However, it's successfully compilable using javac 15-ea+26-1287. I
believe, either spec or implementation should be adjusted.

With best regards,
Tagir Valeev.

[1] http://cr.openjdk.java.net/~gbierman/jep384/jep384-20200506/specs/local-statics-jls.html#jls-6.5.5.1