Hi, Meanwhile, I reduced the problematic code to a maneageable fragment.
The following code typechecks and runs fine: #lang typed/racket (define-type (Base-Shape R) (U (foo-shape R) (bar-shape R))) (define-syntax (def-base-shape stx) (syntax-case stx () [(_ (R (func-name shape-name) [param-name : param-type] ...)) (syntax/loc stx (begin (struct (R) shape-name ([param-name : param-type] ...)) (define #:forall (R) (func-name [param-name : param-type] ...) (shape-name param-name ...))))])) (def-base-shape (R (foo-func foo-shape) [s : (Base-Shape R)])) (def-base-shape (R (bar-func bar-shape) [s : R])) (provide foo) (define (foo [shapes : (Base-Shape String)]) (foo-func shapes)) ;(provide bar) (define (bar [shapes : (Base-Shape String)]) (bar-func shapes)) However, if you uncomment the last provide, it generates an error: ..\..\..\..\..\..\..\..\Program Files\Racket-6.2.900.10\share\pkgs\typed-racket-lib\typed-racket\static-contracts\optimize.rkt:155:2: free-id-table-ref: no mapping for #<syntax n*11> Is there a workaround? Best, António. -- You received this message because you are subscribed to the Google Groups "Racket Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-dev+unsubscr...@googlegroups.com. To post to this group, send email to racket-dev@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-dev/3a2f30ad-218e-4684-a769-7371c069e3c0%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.