GNU bug report logs - #16153
24.3.50; (gv-ref (car (cdr x))) => strange expression

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: michael_heerdegen <at> web.de
Subject: bug#16153: closed (Re: bug#16153: 24.3.50; (gv-ref (car (cdr x)))
 => strange expression)
Date: Mon, 16 Dec 2013 19:13:02 +0000

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Your bug report

#16153: 24.3.50; (gv-ref (car (cdr x))) => strange expression

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 16153 <at> debbugs.gnu.org.

-- 
16153: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16153
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Michael Heerdegen <michael_heerdegen <at> web.de>
Cc: 16153-done <at> debbugs.gnu.org
Subject: Re: bug#16153: 24.3.50; (gv-ref (car (cdr x))) => strange expression
Date: Mon, 16 Dec 2013 14:11:55 -0500

>> In general, `gv-ref' only works with lexical-binding.
> I see.  Maybe say this somewhere - in the doc string, or at least in the
> source code.  It's IMHO not obvious (or is it?).

I added a note in the docstring, thank you,


        Stefan

[Message part 3 (message/rfc822, inline)]

From: Michael Heerdegen <michael_heerdegen <at> web.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; (gv-ref (car (cdr x))) => strange expression
Date: Sun, 15 Dec 2013 07:29:05 +0100

Hi,

Sorry if I speak nonsense, but that doesn't make sense to me:

(setq x '(1 (2 3) 4))

(setq ref (gv-ref (car (cdr x))))

  ==>
  
   ((lambda nil
     (car #1=#:v))
    lambda
    (gv--val)
    (setcar #1# gv--val))


(gv-deref ref)

Symbol's value as variable is void: #:v

Seems like `gv-letplace' is constructing an illegitimate expression with
a free variable here.


Regards,

Michael.




In GNU Emacs 24.3.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.8.4)
 of 2013-11-13 on drachen
Windowing system distributor `The X.Org Foundation', version 11.0.11403000
System Description:	Debian GNU/Linux testing (jessie)

Configured using:
 `configure --prefix=/usr/local/built/'

Important settings:
  value of $LC_ALL: de_DE.utf8
  value of $LC_COLLATE: C
  value of $LC_TIME: C
  value of $LANG: de_DE.utf8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

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