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Behaviour of (letrec ([x x]) x) changed in Racket

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The latest Racket has changed the behaviour of (letrec ([x x]) x).
Currently any program beginning with #lang whalesong fails due
to an "x undefined" error. The undefined value is now exported
from racket/undefined.
This commit is contained in:
Jens Axel Søgaard 2014-06-30 00:28:01 +02:00
parent 60a70798a8
commit ecd0a52d85
1 changed files with 1 additions and 1 deletions
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whalesong/lang/private/shared.rkt
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@ -6,13 +6,13 @@
syntax/struct syntax/struct
racket/struct-info racket/struct-info
scheme/include) scheme/include)
racket/undefined
"traced-app.rkt") "traced-app.rkt")
(provide shared) (provide shared)
(define-for-syntax code-insp (current-code-inspector)) (define-for-syntax code-insp (current-code-inspector))
(define undefined (letrec ([x x]) x))
(require (only-in "../kernel.rkt" [cons the-cons])) (require (only-in "../kernel.rkt" [cons the-cons]))
(define-syntax shared (define-syntax shared