At Wed, 4 Dec 2019 22:24:10 +0100, Dominik Pantůček wrote:
> What about all the vector-ref, -set! and basically all indices
> contracts? That should probably be the same.

I'm less enthusiastic about that change. It turns out that a non-fixnum
argument won't work for `vector-ref`, but the stronger constraint is
that the argument needs to be less than the vector's length. So, it
seems redundant in an unhelpful way to require that the argument
individually is a fixnum --- but I'm not completely sure.

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