[plt-scheme] multiple units with identical signatures

GOT IT

dangit...

I was using (define-values (a b) ...) for something that returned 2
values, but putting a procedure in the way, on the unit invocation level.


(define-values (a b)
  (some-wrapper
    (return-two-values ...)))

--> context expected 1 value, received 2 values: #<procedure>
#<procedure>

...with no stack trace, no indication where the values were being
improperly returned.