GNU bug report logs - #19326
24.4; tex-validate-buffer error "Buffer is read-only"

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

From: Kevin Ryde <user42_kevin <at> yahoo.com.au>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.4; tex-validate-buffer error "Buffer is read-only"
Date: Tue, 09 Dec 2014 18:07:58 +1100

Running

    emacs -Q /tmp/foo.tex
    M-x tex-validate-buffer
    =>
    error: Buffer is read-only: #<buffer *Occur*>

I hoped it would say something, or nothing, about the buffer -- an empty
buffer in this case.

It looks like occur-mode may set the occur buffer read-only which
tex-validate-buffer doesn't expect when writing its output there.


In GNU Emacs 24.4.1 (i586-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2014-10-26 on x86-csail-01, modified by Debian
Configured using:
 `configure --build i586-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/emacs24:/etc/emacs:/usr/local/share/emacs/24.4/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.4/site-lisp:/usr/share/emacs/site-lisp
 --build i586-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/emacs24:/etc/emacs:/usr/local/share/emacs/24.4/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.4/site-lisp:/usr/share/emacs/site-lisp
 --with-x=yes --with-x-toolkit=lucid --with-toolkit-scroll-bars
 --without-gconf --without-gsettings 'CFLAGS=-g -O2
 -fstack-protector-strong -Wformat -Werror=format-security -Wall'
 CPPFLAGS=-D_FORTIFY_SOURCE=2 LDFLAGS=-Wl,-z,relro'

Important settings:
  value of $LANG: en_AU.utf8
  locale-coding-system: utf-8-unix

Message #8 received at 19326 <at> debbugs.gnu.org (full text, mbox):

From: phs <phs <at> lsv.ens-cachan.fr>
To: 19326 <at> debbugs.gnu.org
Subject: Re: 24.4; tex-validate-buffer error "Buffer is read-only"
Date: Wed, 23 Sep 2015 13:34:35 +0200

have the same bug in my config. Basically I can't use 
tex-validate-buffer or tex-validate-region which I'd rank as "severe" 
from a user's viewpoint.

The code in tex-mode.el acknowledges that using occur-mode is not a good 
solution and argues for a major rewrite.

A quick hack that may help the original poster (and other users) is to 
insert the following line in your emacs init file:

    (add-hook 'occur-mode-hook (function (lambda () (read-only-mode -1))))

--phs

In GNU Emacs 24.5.1 (x86_64-apple-darwin13.4.0, NS apple-appkit-1265.21)
 of 2015-04-10 on builder10-9.porkrind.org
Windowing system distributor `Apple', version 10.3.1348
Configured using:
 `configure --with-ns '--enable-locallisppath=/Library/Application
 Support/Emacs/${version}/site-lisp:/Library/Application 
Support/Emacs/site-lisp''

Important settings:
  value of $LC_ALL: en_US
  value of $LANG: en_US
  locale-coding-system: utf-8-unix

Message #11 received at 19326 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Kevin Ryde <user42_kevin <at> yahoo.com.au>
Cc: 19326 <at> debbugs.gnu.org
Subject: Re: bug#19326: 24.4; tex-validate-buffer error "Buffer is read-only"
Date: Wed, 12 Aug 2020 09:55:15 -0700

found 19326 28.0.50
tags 19326 + confirmed
severity 19326 minor
thanks

Kevin Ryde <user42_kevin <at> yahoo.com.au> writes:

> Running
>
>     emacs -Q /tmp/foo.tex
>     M-x tex-validate-buffer
>     =>
>     error: Buffer is read-only: #<buffer *Occur*>
>
> I hoped it would say something, or nothing, about the buffer -- an empty
> buffer in this case.
>
> It looks like occur-mode may set the occur buffer read-only which
> tex-validate-buffer doesn't expect when writing its output there.

I can reproduce this on current master.

Best regards,
Stefan Kangas

Message #20 received at 19326 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Kevin Ryde <user42_kevin <at> yahoo.com.au>
Cc: 19326 <at> debbugs.gnu.org
Subject: Re: bug#19326: 24.4; tex-validate-buffer error "Buffer is read-only"
Date: Tue, 13 Jul 2021 20:13:39 +0200

Kevin Ryde <user42_kevin <at> yahoo.com.au> writes:

> Running
>
>     emacs -Q /tmp/foo.tex
>     M-x tex-validate-buffer
>     =>
>     error: Buffer is read-only: #<buffer *Occur*>
>
> I hoped it would say something, or nothing, about the buffer -- an empty
> buffer in this case.

This should now be fixed in Emacs 28.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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