I'd like to be able to do something like this:

(struct foo (a b c))
(define lst-A '(a b))
(define lst-B '(d e))

I'd expected this to produce:  (foo 'a 'd 0) (foo 'b 'e 1), but instead it
throws an exception "expected list, given stream".  I could do it with a
for/list but that's much more verbose.  What would be the idiomatic way of
doing this?

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