On 10/20/2011 09:24 PM, Robby Findler wrote:
On Thu, Oct 20, 2011 at 10:11 PM, Ryan Culpepper<r...@cs.utah.edu> wrote:
Looks like it works in 5.0.2 (November 2010) but fails in 5.1 (February
2011).
You're talking about in the teaching languages, right?
Right, I was talking about just the teaching languages.
> In #lang
racket, I see the first-produces-error behavior back to 5.0:
[robby@penghu] /Applications/Racket v5.0.2/bin$ ./racket
Welcome to Racket v5.0.2.
(first (shared ((x (cons 1 x))) x))
first: expected argument of type<non-empty list>; given #0='(1 . #0#)
At least for the racket language, this seems to go back at least as far as 5.0:
[robby@penghu] /Applications$ ./Racket\ v5.0/bin/racket
Welcome to Racket v5.0.
(first (shared ((x (cons 1 x))) x))
first: expected argument of type<non-empty list>; given #0='(1 . #0#)
This behavior in the racket/scheme languages goes back to at least PLT
Scheme 4.2, and probably as long as scheme/list has existed.
Ryan
_________________________________________________
For list-related administrative tasks:
http://lists.racket-lang.org/listinfo/dev
