Consider a beginner file with:
(define-struct boa (name length))
Student writes a template/function with parameter named "a-boa", but
misspells one occurrence, writing "boa" instead of "a-boa".
(define (feed a-boa)
(make-boa (boa-name a-boa)
(boa-length boa)))
Their tests then fail at runtime with:
boa-length: expects argument of type <struct:boa>; given (make-signature ...)
Why is "boa" as a type visible at all in the student languages? The
make-signature thing is really confusing, because they recognize it as
something like a constructor but they don't know what structure it
corresponds to.
--- nadeem
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