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

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Package: guile;

Reported by: BT Templeton <bpt <at> hcoop.net>

Date: Wed, 21 Dec 2011 05:37:02 UTC

Severity: normal

Done: Andy Wingo <wingo <at> pobox.com>

Bug is archived. No further changes may be made.

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Report forwarded to bug-guile <at> gnu.org:
bug#10337; Package guile. (Wed, 21 Dec 2011 05:37:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to BT Templeton <bpt <at> hcoop.net>:
New bug report received and forwarded. Copy sent to bug-guile <at> gnu.org. (Wed, 21 Dec 2011 05:37:03 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

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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Information forwarded to bug-guile <at> gnu.org:
bug#10337; Package guile. (Thu, 22 Dec 2011 03:09:02 GMT) Full text and rfc822 format available.

Message #8 received at 10337 <at> debbugs.gnu.org (full text, mbox):

From: Andy Wingo <wingo <at> pobox.com>
To: BT Templeton <bpt <at> hcoop.net>
Cc: 10337 <at> debbugs.gnu.org
Subject: Re: bug#10337: cdr of `(cons #nil #nil)' is not nil
Date: Wed, 21 Dec 2011 22:05:57 -0500

On Tue 20 Dec 2011 22:49, BT Templeton <bpt <at> hcoop.net> writes:

> scheme@(guile-user)> (equal? (cons #t #nil) (cons #t '()))
> $1 = #t

Fixed.  Thanks for the report!

Andy
-- 
http://wingolog.org/
Reply sent to Andy Wingo <wingo <at> pobox.com>:
You have taken responsibility. (Thu, 22 Dec 2011 03:09:02 GMT) Full text and rfc822 format available.
Notification sent to BT Templeton <bpt <at> hcoop.net>:
bug acknowledged by developer. (Thu, 22 Dec 2011 03:09:02 GMT) Full text and rfc822 format available.

Message #13 received at 10337-done <at> debbugs.gnu.org (full text, mbox):

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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bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Thu, 19 Jan 2012 12:24:04 GMT) Full text and rfc822 format available.
This bug report was last modified 13 years and 158 days ago.

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