Ryan, I noticed this seems to be a problem in full Racket as well: try #lang racket
(define web-colors (shared ([W (cons "white" G)] [G (cons "grey" W)]) W)) (rest web-colors) Robby privately wrote to say it should be regarded as a bug. Shriram _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev