import org.chromium.build.annotations.NullMarked;
import org.chromium.build.annotations.Nullable;

@NullMarked
class Foo {
  static interface Base<T extends @Nullable Object> {}
  static interface Sub<T> extends Base<@Nullable T> {}

  static void foo(Base<@Nullable Object> arg) {}
  static void bar(Sub<Object> arg) {
    foo(arg);
  }
}

Foo.java:11: warning: [NullAway] Cannot pass parameter of type Sub<Object>, as formal parameter has type Base<@Nullable Object>, which has mismatched type parameter nullability
    foo(arg);
        ^