import org.checkerframework.checker.nullness.qual.NonNull;
import org.checkerframework.checker.nullness.qual.Nullable;

public class Issue2865<T extends @Nullable Object> {
    public class C {
        public C(T a) {}

        public void f(T a) {
            new C(a);
            // :: error: (argument.type.incompatible)
            new C(null);
        }
    }

    void test(Issue2865<@NonNull String> s) {
        // :: error: (argument.type.incompatible)
        s.new C(null);
        s.new C("");
    }

    void test2(Issue2865<@Nullable String> s) {
        s.new C(null);
        s.new C("");
    }
}