tests/cases/conformance/es6/computedProperties/computedPropertyNames42.ts(8,5): error TS1166: A computed property name in a class property declaration must directly refer to a built-in Symbol.
tests/cases/conformance/es6/computedProperties/computedPropertyNames42.ts(8,5): error TS2411: Property '[""]' of type 'Foo' is not assignable to string index type 'Foo2'.