Given

const a = Symbol.toStringTag;

class F {
    [a](){ return "" }
}

(new F())[a];

we currently issue a Element implicitly has an 'any' type because expression of type 'symbol' can't be used to index type 'F'.(7053) error on the access.

There should be no errors, as with

const a = Symbol();

class F {
    [a](){ return "" }
}

(new F())[a];

since Symbol.toStringTag is a unique symbol just like what Symbol() makes.