GNU bug report logs - #216
next-error wrong position in target file

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From: help-debbugs <at> gnu.org (Emacs bug Tracking System)
To: Kevin Ryde <user42 <at> zip.com.au>
Subject: bug#197 closed by Chong Yidong <cyd <at> stupidchicken.com> (Re: 
 next-error wrong position in target file)

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This is an automatic notification regarding your bug report
which was filed against the emacs package:

#216: next-error wrong position in target file

It has been closed by Chong Yidong <cyd <at> stupidchicken.com>.

Their explanation is attached below along with your original report.
If this explanation is unsatisfactory and you have not received a
better one in a separate message then please contact Chong Yidong <cyd <at> stupidchicken.com> by
replying to this email.


-- 
216: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=216
Emacs Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Chong Yidong <cyd <at> stupidchicken.com>
To: Kevin Ryde <user42 <at> zip.com.au>, jidanni <at> jidanni.org
Cc: 216-done <at> debbugs.gnu.org
Subject: Re: next-error wrong position in target file
Date: Mon, 28 Jul 2008 15:44:46 -0400

> In Emacs 22.2, the first `next-error' in certain circumstances goes to
> the wrong error line in the target file.  With the dummy file foo.txt
> below, and on a 50 line console,
>
>     emacs -Q foo.txt
>     C-v               # page down in foo.txt
>     C-x b Ret         # back to *scratch* buffer
>     M-x compile
>     echo 'foo.txt:''150: an error here'
>     C-x `             # next-error
>
>     => goes to foo.txt with point at line 56
>
> The echo simply produces a compilation buffer claiming an error at
> foo.txt line 150, but then next-error goes to line 56.  On a different
> size terminal or under X you get a different wrong position, like line
> 45 or 24.

I've checked in a fix.  Thanks.

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

From: Kevin Ryde <user42 <at> zip.com.au>
To: bug-gnu-emacs <at> gnu.org
Subject: next-error wrong position in target file
Date: Thu, 08 May 2008 09:37:54 +1000

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In Emacs 22.2, the first `next-error' in certain circumstances goes to
the wrong error line in the target file.  With the dummy file foo.txt
below, and on a 50 line console,

    emacs -Q foo.txt
    C-v               # page down in foo.txt
    C-x b Ret         # back to *scratch* buffer
    M-x compile
    echo 'foo.txt:''150: an error here'
    C-x `             # next-error

    => goes to foo.txt with point at line 56

The echo simply produces a compilation buffer claiming an error at
foo.txt line 150, but then next-error goes to line 56.  On a different
size terminal or under X you get a different wrong position, like line
45 or 24.

The recipe above is rather specific, there's all sorts of ways it works
correctly.  If you don't scroll-up, or if you leave foo.txt the current
buffer, then it's fine.  I've struck this on various occasions without
ever being able to reproduce it, since a second try in the same session
goes ok!  My recent-ish build of the current emacs cvs head still seems
to have the problem too, whatever it is.



In GNU Emacs 22.2.1 (i486-pc-linux-gnu, GTK+ Version 2.12.3)
 of 2008-04-11 on raven, modified by Debian
configured using `configure  '--build=i486-linux-gnu' '--host=i486-linux-gnu' '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib' '--localstatedir=/var/lib' '--infodir=/usr/share/info' '--mandir=/usr/share/man' '--with-pop=yes' '--enable-locallisppath=/etc/emacs22:/etc/emacs:/usr/local/share/emacs/22.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/22.2/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/22.2/leim' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=i486-linux-gnu' 'host_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_AU
  locale-coding-system: iso-8859-1
  default-enable-multibyte-characters: t

[foo.txt (text/plain, attachment)]

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