Right now, any.dict's index signature is initialized as keyof never, which is the same as string | number | symbol.
That was a mistake on my part -- somewhat counter-intuitively, adding symbol to any.dict's signature causes its least upper bound to be too restrictive when it's used in covariant position.
Right now,
any.dict's index signature is initialized askeyof never, which is the same asstring | number | symbol.That was a mistake on my part -- somewhat counter-intuitively, adding
symboltoany.dict's signature causes its least upper bound to be too restrictive when it's used in covariant position.