hakorune/apps/tests/phase285_visibility_weak_sugar_ng.hako

box Node {
    public weak parent

    setParent(p) {
        me.parent = p  // ❌ Should fail: direct BoxRef assignment
    }
}

static box Main {
    main() {
        local n1 = new Node()
        local n2 = new Node()
        n1.setParent(n2)
        return 0
    }
}