GNU bug report logs - #46323
Error in process filter when killing a *term* buffer

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

From: Amai Kinono <amaikinono <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Error in process filter when killing a *term* buffer
Date: Fri, 5 Feb 2021 14:46:29 +0800

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

Here's how to reproduce:

- `$ emacs -Q`
- `M-x ansi-term`, `RET`
- `C-x k` to kill the term buffer
- There's an error: `Error in process filter: Selecting deleted buffer`. And
  Emacs will freeze for a few secons and you can't do anything during the
  period.

In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.22,
cairo version 1.17.3)
 of 2020-08-29 built on juergen
(I also tried on Emacs master and it can be reproduced.)
Windowing system distributor 'The X.Org Foundation', version 11.0.12010000
System Description: Manjaro Linux

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
error in process filter: Selecting deleted buffer [2 times]
Making completion list...

Configured using:
 'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --with-x-toolkit=gtk3 --with-xft --with-wide-int
 --with-modules --with-cairo --with-harfbuzz 'CFLAGS=-march=x86-64
 -mtune=generic -O2 -pipe -fno-plt' CPPFLAGS=-D_FORTIFY_SOURCE=2
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now'

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD JSON
PDUMPER LCMS2 GMP

Important settings:
  value of $LC_MONETARY: zh_CN.UTF-8
  value of $LC_NUMERIC: zh_CN.UTF-8
  value of $LC_TIME: zh_CN.UTF-8
  value of $LANG: zh_CN.utf8
  value of $XMODIFIERS: @im=fcitx
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-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
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
format-spec rfc822 mml mml-sec password-cache epa derived epg epg-config
gnus-util rmail rmail-loaddefs text-property-search time-date subr-x seq
byte-opt gv bytecomp byte-compile cconv mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs cl-lib
sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils term
disp-table easymenu comint ansi-color ehelp ring china-util tooltip
eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel
term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list replace newcomment text-mode elisp-mode
lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch
timer select scroll-bar mouse jit-lock font-lock syntax facemenu
font-core term/tty-colors frame minibuffer cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded 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 threads dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
cairo move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 49974 5070)
 (symbols 48 6719 1)
 (strings 32 17402 1136)
 (string-bytes 1 565387)
 (vectors 16 11704)
 (vector-slots 8 194920 9956)
 (floats 8 20 33)
 (intervals 56 214 0)
 (buffers 1000 13))

[Message part 2 (text/html, inline)]

Message #8 received at 46323 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Amai Kinono <amaikinono <at> gmail.com>
Cc: 46323 <at> debbugs.gnu.org
Subject: Re: bug#46323: Error in process filter when killing a *term* buffer
Date: Fri, 05 Feb 2021 10:13:45 +0100

Amai Kinono <amaikinono <at> gmail.com> writes:

> Here's how to reproduce:
>
> - `$ emacs -Q`
> - `M-x ansi-term`, `RET`
> - `C-x k` to kill the term buffer
> - There's an error: `Error in process filter: Selecting deleted buffer`. And
>   Emacs will freeze for a few secons and you can't do anything during the
>   period.

Thanks for the clear recipe.  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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