-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi,
regexp-split produces an immutable cons when rnrs/base-6 is required: $ echo "m" | racket -e '(require rnrs/base-6) (car (regexp-split " +" (read-line (current-input-port)))) 'mcar: expects argument of type <mutable-pair>; given '("m") but $ echo "m" | racket -e '(require rnrs/base-6) (car (list (read-line (current-input-port))))' "m" so apparently regexp-split is the culprit, Marijn -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk7PlOEACgkQp/VmCx0OL2wlTwCgwTewaztqNFFkqtQxj9Yh2ELB /FkAnjA9OksH4ziOdIP33C5SdveRx960 =Mw9C -----END PGP SIGNATURE----- _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/dev