* bug#10337: cdr of `(cons #nil #nil)' is not nil
@ 2011-12-21 3:49 BT Templeton
2011-12-22 3:05 ` Andy Wingo
2011-12-22 3:06 ` Andy Wingo
0 siblings, 2 replies; 3+ messages in thread
From: BT Templeton @ 2011-12-21 3:49 UTC (permalink / raw)
To: 10337
I'm using Guile 2.0.3.87-b798 on x86_64-unknown-linux-gnu.
Guile's compiler fails to maintain the distinction between the nil
object and the empty list in some cases:
scheme@(guile-user)> (equal? (cons #t #nil) (cons #t '()))
$1 = #t
scheme@(guile-user)> (eq? (cdr (cons #t #nil)) (cdr (cons #t '())))
$2 = #t
scheme@(guile-user)> (compile '(cons #t #nil) #:from 'scheme #:to
'tree-il)
$3 = #<tree-il (apply (toplevel cons) (const #t) (const #nil))>
scheme@(guile-user)> (compile '(cons #t #nil) #:from 'scheme #:to 'glil)
$4 = #<glil (program () (std-prelude 0 0 #f) (label :LCASE136) (const
#t) (call list 1) (call return 1)>)
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2011-12-21 3:49 bug#10337: cdr of `(cons #nil #nil)' is not nil BT Templeton
2011-12-22 3:05 ` Andy Wingo
2011-12-22 3:06 ` Andy Wingo
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