The below code does not compile, but should:

unittest {
    with (S) {
        a(); // Compiles!
        b(); // Fails!
    }
}

struct S {
    static void a() {}
    static void opDispatch(string name)() {}
}

To make it worse, this compiles:

unittest {
    with (S.init) {
        a(); // Compiles!
        b(); // Compiles!
    }
}

, showing that static methods are considered when looking up methods of an instance.