GNU bug report logs - #10337
cdr of `(cons #nil #nil)' is not nil

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Andy Wingo <wingo <at> pobox.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#10337: closed (cdr of `(cons #nil #nil)' is not nil)
Date: Thu, 22 Dec 2011 03:09:02 +0000

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Your message dated Wed, 21 Dec 2011 22:06:27 -0500
with message-id <87liq5qp8s.fsf <at> pobox.com>
and subject line Re: bug#10337: cdr of `(cons #nil #nil)' is not nil
has caused the debbugs.gnu.org bug report #10337,
regarding cdr of `(cons #nil #nil)' is not nil
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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10337: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10337
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From: BT Templeton <bpt <at> hcoop.net>
To: bug-guile <at> gnu.org
Subject: cdr of `(cons #nil #nil)' is not nil
Date: Tue, 20 Dec 2011 22:49:58 -0500

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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From: Andy Wingo <wingo <at> pobox.com>
To: 10337-done <at> debbugs.gnu.org
Subject: Re: bug#10337: cdr of `(cons #nil #nil)' is not nil
Date: Wed, 21 Dec 2011 22:06:27 -0500

Bug fixed in cc8afa2b361635953dfba7f10e4193b1f243a50f.
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