#[derive(Component)]
struct Foo;

let mut world = World::new();

let foo_id = world.init_component::<Foo>();

world.spawn(Foo);

// With just `FilteredEntityRef` it works fine.
let mut query = QueryBuilder::<FilteredEntityRef>::new(&mut world)
    .ref_id(foo_id)
    .build();
let entity_ref = query.single(&world);
assert!(entity_ref.access().has_read(foo_id));
assert!(entity_ref.get::<Foo>().is_some());

// Inside any tuple it does not work, even 1-element tuples.
let mut query = QueryBuilder::<(FilteredEntityRef,)>::new(&mut world)
    .ref_id(foo_id)
    .build();
let (entity_ref,) = query.single(&world);
assert!(entity_ref.access().has_read(foo_id));
assert!(entity_ref.get::<Foo>().is_some());