[Bug][compiler-v2] Issues with is operator and enums with type paramaters

[mkurnikov]

🐛 Bug

module std::modules {
    enum S1 { Inner }
    enum S2<phantom T> { One }

    fun main(s: S2<u8>) {
        // crashes the compiler
        // s is u8;
        // s is S1;
        // s is S2<S1>;
        // s is S2<S1::Inner>;

        // fails with parser error
        // s is S2<u8>::One;
        // s is S2<S1::Inner>::One;

        // warns on no type argument (but it could actually be inferred from the context)
        s is One;
        s is S2::One;
    }
}

System information

Aptos CLI 6.1.1