// Test case for Issue 1867
// https://github.com/typetools/checker-framework/issues/1867

import java.util.List;

public abstract class Issue1867 {
    interface AInterface {}

    interface BInterface<X extends AInterface> {
        List<? extends X> g();
    }

    abstract List<? extends BInterface<? extends AInterface>> h();

    void f() {
        for (BInterface<? extends AInterface> x : h()) {
            for (AInterface y : x.g()) {}
        }
    }
}