GNU bug report logs - #15327
24.3; Incorrect "Unused lexical variable" warning with avl-tree-create

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Package: emacs;

Reported by: Christopher Wellons <wellons <at> nullprogram.com>

Date: Tue, 10 Sep 2013 18:36:01 UTC

Severity: normal

Found in version 24.3

Done: Stefan Monnier <monnier <at> iro.umontreal.ca>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#15327; Package emacs. (Tue, 10 Sep 2013 18:36:01 GMT) Full text and rfc822 format available.
Acknowledgement sent to Christopher Wellons <wellons <at> nullprogram.com>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Tue, 10 Sep 2013 18:36:02 GMT) Full text and rfc822 format available.

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

From: Christopher Wellons <wellons <at> nullprogram.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3; Incorrect "Unused lexical variable" warning with avl-tree-create
Date: Tue, 10 Sep 2013 14:35:32 -0400

;;; -*- lexical-binding: t; -*-
(require 'avl-tree)
(avl-tree-create #'string<)


In GNU Emacs 24.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.8.2)
 of 2013-06-25 on sochi, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11204000
System Description:	Debian GNU/Linux unstable (sid)
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#15327; Package emacs. (Tue, 10 Sep 2013 18:42:02 GMT) Full text and rfc822 format available.

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

From: Christopher Wellons <wellons <at> nullprogram.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Re: 24.3;
 Incorrect "Unused lexical variable" warning with avl-tree-create
Date: Tue, 10 Sep 2013 14:40:32 -0400

Sorry, I accidentally hit send early. If the above is compiled,

    $ emacs -Q -batch -f batch-byte-compile tmp.el
    In toplevel form:
    tmp.el:3:1:Warning: Unused lexical variable `cmpfun'
    Wrote /tmp/tmp.elc

Due to improper macro expansion of avl-tree-create by defstruct,

    (let
        ((cmpfun #'string<))
      (progn
        (vector 'cl-struct-avl-tree-
                (progn
                  (vector nil nil nil 0))
                #'string<)))
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#15327; Package emacs. (Tue, 10 Sep 2013 21:09:01 GMT) Full text and rfc822 format available.

Message #11 received at 15327 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Christopher Wellons <wellons <at> nullprogram.com>
Cc: 15327 <at> debbugs.gnu.org
Subject: Re: bug#15327: 24.3;
 Incorrect "Unused lexical variable" warning with avl-tree-create
Date: Tue, 10 Sep 2013 17:08:03 -0400

> Sorry, I accidentally hit send early. If the above is compiled,

>     $ emacs -Q -batch -f batch-byte-compile tmp.el
>     In toplevel form:
>     tmp.el:3:1:Warning: Unused lexical variable `cmpfun'
>     Wrote /tmp/tmp.elc

> Due to improper macro expansion of avl-tree-create by defstruct,

>     (let
>         ((cmpfun #'string<))
>       (progn
>         (vector 'cl-struct-avl-tree-
>                 (progn
>                   (vector nil nil nil 0))
>                 #'string<)))

IIUC I fixed this recently in the trunk (the bug was in the expander
part of cl-defsubst).


        Stefan
bug closed, send any further explanations to 15327 <at> debbugs.gnu.org and Christopher Wellons <wellons <at> nullprogram.com> Request was from Stefan Monnier <monnier <at> iro.umontreal.ca> to control <at> debbugs.gnu.org. (Wed, 11 Sep 2013 12:33:03 GMT) Full text and rfc822 format available.
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Thu, 10 Oct 2013 11:24:03 GMT) Full text and rfc822 format available.
This bug report was last modified 11 years and 252 days ago.

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