The following exchange with rudybot, which is running the programs in a sandbox, demonstrates the issue:
09:35 <samth> rudybot: eval (let () (local-require compiler/zo-marshal compiler/zo-structs racket/fasl) (fasl->s-exp (zo-marshal (compilation-top 3 (prefix 0 '() '()) (let-void 1 #t (install-value 1 0 #t (primval 1140) (localref #t 0 #f #f #f ))))))) 09:35 <rudybot> samth: ; Value: #<procedure:unsafe-fx+> 09:36 <samth> rudybot: eval ((let () (local-require compiler/zo-marshal compiler/zo-structs racket/fasl) (fasl->s-exp (zo-marshal (compilation-top 3 (prefix 0 '() '()) (let-void 1 #t (install-value 1 0 #t (primval 1140) (localref #t 0 #f #f #f ))))))) vector-ref vector-ref) 09:36 <rudybot> samth: ; Value: 32681168 The relevant program is: (let () (local-require compiler/zo-marshal compiler/zo-structs racket/fasl) (fasl->s-exp (zo-marshal (compilation-top 3 (prefix 0 '() '()) (let-void 1 #t (install-value 1 0 #t (primval 1140) (localref #t 0 #f #f #f ))))))) Sam _________________________ Racket Developers list: http://lists.racket-lang.org/dev