GNU bug report logs - #20549
24.5; tcl.el: sending region to tcl process produces error

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 20549 in the body.
You can then email your comments to 20549 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

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

From: a.c.kalker <at> gmail.com
To: bug-gnu-emacs <at> gnu.org
Subject: 24.5; tcl.el: sending region to tcl process produces error
Date: Mon, 11 May 2015 19:52:22 +0200

Steps to reproduce:
- Visit a Tcl boffer
- Start a new Tcl process using C-c C-t
- Select a region containing one or more Tcl commands
- Try and send it to the Tcl process using C-c C-x

Actual results:
- Emacs reports an error: "error in process filter: Text is read-only"
- No Tcl commands are sent to the Tcl process
- Further interaction with the Tcl process buffer becomes erratic

Expected results:
- The region should be sent to the Tcl process, and any commands should
be executed.
- The Tcl process buffer should interact normally, accepting new
manually entered commands and displaying their results.

From some experimenting and some helpful discussion on IRC, I found that
a very likely cause of the problem is the way in which Tcl mode tries to
erase the prompt in a process buffer.  Apparently it doesn't handle
read-only prompts correctly.



In GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.16.2)
 of 2015-04-20 on bitzer.hoetzel.info
Windowing system distributor `The X.Org Foundation', version 11.0.11701000
Configured using:
 `configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --with-x-toolkit=gtk3 --with-xft
 'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong
 --param=ssp-buffer-size=4' CPPFLAGS=-D_FORTIFY_SOURCE=2
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro'

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

Major mode: Tcl

Minor modes in effect:
  delete-selection-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  show-paren-mode: t
  icomplete-mode: t
  google-this-mode: t
  global-whitespace-mode: t
  global-flycheck-mode: t
  flycheck-mode: t
  global-company-mode: t
  company-mode: t
  cua-mode: t
  server-mode: t
  auto-compile-on-load-mode: t
  auto-compile-on-save-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: (only . t)

Recent messages:
[yas] Loading for `emacs-lisp-mode', just-in-time: (lambda nil (yas--load-directory-1 (quote /home/miki/.emacs.d/elpa/yasnippet-20150415.244/snippets/emacs-lisp-mode) (quote emacs-lisp-mode)))!
[yas] Loading compiled snippets from /home/miki/.emacs.d/elpa/yasnippet-20150415.244/snippets/emacs-lisp-mode
[yas] Loading for `prog-mode', just-in-time: (lambda nil (yas--load-directory-1 (quote /home/miki/.emacs.d/elpa/yasnippet-20150415.244/snippets/prog-mode) (quote prog-mode)))!
[yas] Loading compiled snippets from /home/miki/.emacs.d/elpa/yasnippet-20150415.244/snippets/prog-mode
Loading /home/miki/.emacs.d/elpa/yasnippet-20150415.244/snippets/prog-mode/.yas-setup...done
For information about GNU Emacs and the GNU system, type C-h C-a.
test.tcl has auto save data; consider M-x recover-this-file
C-c C-c is undefined [2 times]
Mark set
error in process filter: Text is read-only [2 times]

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message idna cl-macs rfc822 mml mml-sec
mm-decode mm-bodies mm-encode mailabbrev gmm-utils mailheader sendmail
tcl comint ansi-color mule-util hideshow eldoc elisp-slime-nav hl-sexp
.emacs saveplace imenu company-files company-oddmuse company-keywords
company-etags etags ring company-gtags company-dabbrev-code
company-dabbrev company-capf company-cmake company-xcode company-clang
company-semantic company-eclim company-template company-css company-nxml
company-bbdb company-irony irony-completion irony-snippet company-tern s
ucs-normalize dash-functional tern url-http tls url-auth mail-parse
rfc2231 rfc2047 rfc2045 ietf-drums url-gw json tsdh-dark-theme delsel
yasnippet cl gv paren icomplete google-this url url-proxy url-privacy
url-expand url-methods url-history url-cookie url-domsuf url-util
mailcap gnus gnus-ems nnheader mail-utils wid-edit whitespace
flycheck-irony irony-diagnostics irony flycheck find-func rx subr-x
company cua-base cus-start cus-load edmacro kmacro ix grapnel help-mode
easy-mmode dired+ image-dired format-spec image-file dired-x dired-aux
dired pkg-info-autoloads queue-autoloads info easymenu slime-autoloads
sly-autoloads package epg-config server ffap thingatpt url-parse
auth-source eieio eieio-core gnus-util mm-util mail-prsvr password-cache
url-vars jka-compr auto-compile byte-opt advice help-fns packed dash
bytecomp byte-compile cl-extra cl-loaddefs cl-lib cconv time-date
tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
x-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list
newcomment lisp-mode prog-mode register page menu-bar rfn-eshadow timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai
tai-viet lao korean japanese hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help
simple abbrev minibuffer nadvice loaddefs button faces cus-face macroexp
files text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
dbusbind gfilenotify dynamic-setting system-font-setting
font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs)

Memory information:
((conses 16 307146 13122)
 (symbols 48 30569 0)
 (miscs 40 107 134)
 (strings 32 49936 10483)
 (string-bytes 1 1483638)
 (vectors 16 44446)
 (vector-slots 8 797314 12468)
 (floats 8 417 615)
 (intervals 56 277 67)
 (buffers 960 15)
 (heap 1024 39504 4017))

Message #8 received at 20549 <at> debbugs.gnu.org (full text, mbox):

From: Alain Kalker <a.c.kalker <at> gmail.com>
To: 20549 <at> debbugs.gnu.org
Subject: Sample TCL command to send
Date: Mon, 11 May 2015 20:10:47 +0200

For those who don't have Tcl for breakfast lunch and dinner, an example 
command to try is simply

puts 42

This should display the number 42.

Message #11 received at 20549 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: a.c.kalker <at> gmail.com
Cc: 20549 <at> debbugs.gnu.org
Subject: Re: bug#20549: 24.5;
 tcl.el: sending region to tcl process produces error
Date: Tue, 12 May 2015 02:39:36 -0400

a.c.kalker <at> gmail.com wrote:

> - Visit a Tcl boffer
> - Start a new Tcl process using C-c C-t
> - Select a region containing one or more Tcl commands
> - Try and send it to the Tcl process using C-c C-x
>
> Actual results:
> - Emacs reports an error: "error in process filter: Text is read-only"

Thanks for the report, but I can't reproduce this.
Can you give a complete example starting from emacs -Q?

Message #14 received at 20549 <at> debbugs.gnu.org (full text, mbox):

From: Alain Kalker <a.c.kalker <at> gmail.com>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 20549 <at> debbugs.gnu.org
Subject: Re: bug#20549: 24.5; tcl.el: sending region to tcl process produces
 error
Date: Tue, 12 May 2015 19:15:11 +0200

On 05/12/2015 08:39 AM, Glenn Morris wrote:
> a.c.kalker <at> gmail.com wrote:
>
>> - Visit a Tcl boffer
>> - Start a new Tcl process using C-c C-t
>> - Select a region containing one or more Tcl commands
>> - Try and send it to the Tcl process using C-c C-x
>>
>> Actual results:
>> - Emacs reports an error: "error in process filter: Text is read-only"
>
> Thanks for the report, but I can't reproduce this.
> Can you give a complete example starting from emacs -Q?

Ah, I'm sorry, i realize i did forget to mention a crucial piece of the 
puzzle (marked with + below), namely that I have customized a variable 
to have read-only prompts in comint buffers.
Here is the corrected list of steps:

- Start Emacs as `emacs -Q`
+ Configure prompts to be read-only using M-x set-variable RET 
comint-prompt-read-only RET t
- Visit a new Tcl file, example test.tcl
- Enter a Tcl command for testing, say `puts 42`
- Start Tcl process using C-c C-t
- Switch back to test.tcl buffer using C-x o
- Select all text using C-x h
- Try and send it to Tcl process using C-c C-x

This produces the error which I mentioned earlier.

Kind regards,

Alain

Message #17 received at 20549 <at> debbugs.gnu.org (full text, mbox):

From: Alain Kalker <a.c.kalker <at> gmail.com>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 20549 <at> debbugs.gnu.org
Subject: Re: bug#20549: 24.5; tcl.el: sending region to tcl process produces
 error
Date: Tue, 12 May 2015 19:20:36 +0200

Ah, second and third steps need to be reversed. set-variable doesn't 
accept the variable name until after visiting a Tcl file.

On 05/12/2015 07:15 PM, Alain Kalker wrote:
> - Start Emacs as `emacs -Q`
> - Visit a new Tcl file, example test.tcl
> + Configure prompts to be read-only using M-x set-variable RET
> comint-prompt-read-only RET t
> - Enter a Tcl command for testing, say `puts 42`
> - Start Tcl process using C-c C-t
> - Switch back to test.tcl buffer using C-x o
> - Select all text using C-x h
> - Try and send it to Tcl process using C-c C-x
>
> This produces the error which I mentioned earlier.
>
> Kind regards,
>
> Alain

Message #24 received at 20549-done <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 20549-done <at> debbugs.gnu.org
Subject: Re: bug#20549: 24.5;
 tcl.el: sending region to tcl process produces error
Date: Tue, 12 May 2015 21:20:11 -0400

Version: 25.1

Thanks; fixed.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.