GNU bug report logs - #22288
25.0.50; Incorrect line and column number in byte-compilation warning

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Clément Pit--Claudel <clement.pitclaudel <at> live.com>
Subject: bug#22288: closed (Re: bug#22288: 25.0.50; Incorrect line and
 column number in byte-compilation warning)
Date: Sat, 22 Jan 2022 18:18:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#22288: 25.0.50; Incorrect line and column number in byte-compilation warning

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 22288 <at> debbugs.gnu.org.

-- 
22288: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=22288
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Alan Mackenzie <acm <at> muc.de>
To: Clément Pit--Claudel <clement.pitclaudel <at> live.com>
Cc: 22288-done <at> debbugs.gnu.org
Subject: Re: bug#22288: 25.0.50; Incorrect line and column number in
 byte-compilation warning
Date: Sat, 22 Jan 2022 18:16:58 +0000

Hello Everybody.

This bug has just been fixed in master by merging in branch
scratch/correct-warning-pos.

-- 
Alan Mackenzie (Nuremberg, Germany).

On Fri, Jan 01, 2016 at 10:54:24 -0500, Clément Pit--Claudel wrote:
> Hi all,

> The byte-compiler doesn't always report the right line and column numbers. For example for the following program in test.el:

> (defun test ()
>   (let (a))
>   a)

> Running M-x byte-compile-file RET test.el RET yields:

> > Compiling file /home/clement/test.el at Fri Jan  1 10:48:41 2016

> > In test:
> > test.el:2:9:Warning: reference to free variable ‘a’

> The correct warning would be

> > test.el:3:2:Warning: reference to free variable ‘a’

> Note that the following program gives the right error:

> (defun test ()
>   (let (b))
>   a)

> > test.el:3:3:Warning: reference to free variable ‘a’

> Although one might argue that it should be

> > test.el:3:2:Warning: reference to free variable ‘a’

> (that is, column 2, not 3) given that Emacs starts counting columns at 0.

> Cheers,
> Clément.

> In GNU Emacs 25.0.50.8 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.8)
>  of 2015-12-29 built on clem-w50-mint
> Repository revision: a21bb238ce7bcc9c13a9cf66db77918304daa2fc
> Windowing system distributor 'The X.Org Foundation', version 11.0.11501000
> System Description:	Linux Mint 17.2 Rafaela

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

From: Clément Pit--Claudel <clement.pitclaudel <at> live.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.50; Incorrect line and column number in byte-compilation warning
Date: Fri, 1 Jan 2016 10:54:24 -0500

[Message part 4 (text/plain, inline)]

Hi all,

The byte-compiler doesn't always report the right line and column numbers. For example for the following program in test.el:

(defun test ()
  (let (a))
  a)

Running M-x byte-compile-file RET test.el RET yields:

> Compiling file /home/clement/test.el at Fri Jan  1 10:48:41 2016
>
> In test:
> test.el:2:9:Warning: reference to free variable ‘a’

The correct warning would be

> test.el:3:2:Warning: reference to free variable ‘a’

Note that the following program gives the right error:

(defun test ()
  (let (b))
  a)

> test.el:3:3:Warning: reference to free variable ‘a’

Although one might argue that it should be

> test.el:3:2:Warning: reference to free variable ‘a’

(that is, column 2, not 3) given that Emacs starts counting columns at 0.

Cheers,
Clément.

In GNU Emacs 25.0.50.8 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.8)
 of 2015-12-29 built on clem-w50-mint
Repository revision: a21bb238ce7bcc9c13a9cf66db77918304daa2fc
Windowing system distributor 'The X.Org Foundation', version 11.0.11501000
System Description:	Linux Mint 17.2 Rafaela

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Features:
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cl-macs info package epg-config compatibility seq byte-opt gv compile
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multi-tty make-network-process emacs)

Memory information:
((conses 16 445068 11836)
 (symbols 48 34336 0)
 (miscs 40 91 485)
 (strings 32 84162 14046)
 (string-bytes 1 2172652)
 (vectors 16 49548)
 (vector-slots 8 1484645 186267)
 (floats 8 296 222)
 (intervals 56 3143 1078)
 (buffers 976 15)
 (heap 1024 39773 2180))

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