GNU bug report logs - #69987
28.2; *mailcap shell* not in buffer list

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

From: tom <at> logand.com
To: bug-gnu-emacs <at> gnu.org
Subject: 28.2; *mailcap shell* not in buffer list
Date: Sun, 24 Mar 2024 20:12:54 +0100

After switching away from *mailcap shell* buffer
there is no way to get back to it.
At least I cannot find it in the *Buffer List* buffer.
Would it be possible to keep the *mailcap shell* buffer
around as usual?  This automagical disappearance is
rather inconvenient and surprising.



In GNU Emacs 28.2 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw3d scroll bars)
System Description: NixOS 23.05 (Stoat)

Configured using:
 'configure
 --prefix=/nix/store/5wrix9hmj9pacadlvim5gwxsdwc6321b-emacs-28.2
 --disable-build-details --with-modules --with-x-toolkit=lucid
 --with-xft --with-cairo --with-native-compilation'

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG JSON
LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY
INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS
X11 XAW3D XDBE XIM XPM LUCID ZLIB

Important settings:
  value of $EMACSLOADPATH: 
  value of $EMACSNATIVELOADPATH: /nix/store/icpc3z2b3ix2jw2vrgp217wa40pd3hwl-emacs-packages-deps/share/emacs/native-lisp::
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: @im=fcitx
  locale-coding-system: utf-8-unix

Major mode: notmuch-show

Minor modes in effect:
  gpm-mouse-mode: t
  eev-mode: t
  global-git-commit-mode: t
  magit-auto-revert-mode: t
  shell-dirtrack-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-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: linux
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  visual-line-mode: t
  transient-mark-mode: t

Load-path shadows:
/run/current-system/sw/share/emacs/site-lisp/site-start hides /nix/store/icpc3z2b3ix2jw2vrgp217wa40pd3hwl-emacs-packages-deps/share/emacs/site-lisp/site-start
/run/current-system/sw/share/emacs/site-lisp/site-start hides /nix/store/5wrix9hmj9pacadlvim5gwxsdwc6321b-emacs-28.2/share/emacs/site-lisp/site-start
/nix/store/icpc3z2b3ix2jw2vrgp217wa40pd3hwl-emacs-packages-deps/share/emacs/site-lisp/elpa/transient-20230602.2121/transient hides /nix/store/5wrix9hmj9pacadlvim5gwxsdwc6321b-emacs-28.2/share/emacs/28.2/lisp/transient
/nix/store/icpc3z2b3ix2jw2vrgp217wa40pd3hwl-emacs-packages-deps/share/emacs/site-lisp/elpa/let-alist-1.0.6/let-alist hides /nix/store/5wrix9hmj9pacadlvim5gwxsdwc6321b-emacs-28.2/share/emacs/28.2/lisp/emacs-lisp/let-alist

Features:
(shadow emacsbug dired-aux tramp-cmds rect pcmpl-unix org-element
avl-tree ol-eww ol-rmail ol-mhe ol-irc ol-info ol-gnus nnselect
gnus-search eieio-opt speedbar ezimage dframe gnus-art mm-uu mml2015
gnus-sum gnus-group gnus-undo gnus-start gnus-dbus dbus gnus-cloud
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gnus-win ol-docview doc-view jka-compr image-mode exif ol-bibtex ol-bbdb
ol-w3m ol-doi org-link-doi mm-archive qp mailalias sendmail feedmail
sort mail-extr company-oddmuse company-keywords company-etags
company-gtags company-dabbrev-code company-dabbrev company-files
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korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
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inotify dynamic-setting system-font-setting font-render-setting cairo
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Memory information:
((conses 16 3685347 590674)
 (symbols 48 42598 4)
 (strings 32 377463 41688)
 (string-bytes 1 21714710)
 (vectors 16 83742)
 (vector-slots 8 2168580 192474)
 (floats 8 867 305)
 (intervals 56 629850 48218)
 (buffers 992 38))

Message #8 received at 69987 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: tom <at> logand.com
Cc: 69987 <at> debbugs.gnu.org
Subject: Re: bug#69987: 28.2; *mailcap shell* not in buffer list
Date: Sun, 24 Mar 2024 21:32:30 +0200

> From: tom <at> logand.com
> Date: Sun, 24 Mar 2024 20:12:54 +0100
> 
> After switching away from *mailcap shell* buffer
> there is no way to get back to it.
> At least I cannot find it in the *Buffer List* buffer.
> Would it be possible to keep the *mailcap shell* buffer
> around as usual?  This automagical disappearance is
> rather inconvenient and surprising.

Can you show a recipe, preferably starting from "emacs -Q"?  Or at
least explain how you get to this *mailcap shell* buffer?  That would
help us investigate the issue.

A stab in the dark: if the buffer's name is actually " *mailcap shell*",
i.e. it begins with a space, then you can switch to it by typing its
name at the "C-x b" prompt.

Message #11 received at 69987 <at> debbugs.gnu.org (full text, mbox):

From: Tomas Hlavaty <tom <at> logand.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 69987 <at> debbugs.gnu.org
Subject: Re: bug#69987: 28.2; *mailcap shell* not in buffer list
Date: Sun, 24 Mar 2024 23:25:50 +0100

Hi Eli,

thanks for the quick reply.

> Can you show a recipe, preferably starting from "emacs -Q"?  Or at
> least explain how you get to this *mailcap shell* buffer?

$ emacs -Q --eval='(eww
"https://dq4n3btxmr8c9.cloudfront.net/files/oj7hht/Liberties_Rule_Of_Law_Report_2024_FULL.pdf")'

then C-x 1 to hide the *mailcal shell* buffer

then C-x C-b to show *Buffer List*

> A stab in the dark: if the buffer's name is actually " *mailcap shell*",
> i.e. it begins with a space,

you are right, fascinating

> then you can switch to it by typing its name at the "C-x b" prompt.

this works, thank you!

although not very discoverable

Where could I learn more about such buffer name conventions?

Regards,

Tomas

Message #14 received at 69987 <at> debbugs.gnu.org (full text, mbox):

From: Stephen Berman <stephen.berman <at> gmx.net>
To: Tomas Hlavaty <tom <at> logand.com>
Cc: 69987 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
Subject: Re: bug#69987: 28.2; *mailcap shell* not in buffer list
Date: Mon, 25 Mar 2024 00:25:25 +0100

On Sun, 24 Mar 2024 23:25:50 +0100 Tomas Hlavaty <tom <at> logand.com> wrote:

> Hi Eli,
>
> thanks for the quick reply.
>
>> Can you show a recipe, preferably starting from "emacs -Q"?  Or at
>> least explain how you get to this *mailcap shell* buffer?
>
> $ emacs -Q --eval='(eww
> "https://dq4n3btxmr8c9.cloudfront.net/files/oj7hht/Liberties_Rule_Of_Law_Report_2024_FULL.pdf")'
>
> then C-x 1 to hide the *mailcal shell* buffer
>
> then C-x C-b to show *Buffer List*
>
>> A stab in the dark: if the buffer's name is actually " *mailcap shell*",
>> i.e. it begins with a space,
>
> you are right, fascinating
>
>> then you can switch to it by typing its name at the "C-x b" prompt.
>
> this works, thank you!
>
> although not very discoverable
>
> Where could I learn more about such buffer name conventions?

In the Emacs user's manual (info "(emacs) List Buffers"):

   21.2 Listing Existing Buffers
   =============================
   
   ‘C-x C-b’
        List the existing buffers (‘list-buffers’).
   [...]
      ‘list-buffers’ omits buffers whose names begin with a space, unless
   they visit files: such buffers are used internally by Emacs.

With `M-x ibuffer' you get a table of all buffers, including those
beginning with a space, by typing `C-u g' in the *Ibuffer* buffer.

Steve Berman

Message #17 received at 69987 <at> debbugs.gnu.org (full text, mbox):

From: Tomas Hlavaty <tom <at> logand.com>
To: Stephen Berman <stephen.berman <at> gmx.net>
Cc: 69987 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
Subject: Re: bug#69987: 28.2; *mailcap shell* not in buffer list
Date: Mon, 25 Mar 2024 07:20:00 +0100

On Mon 25 Mar 2024 at 00:25, Stephen Berman <stephen.berman <at> gmx.net> wrote:
> (info "(emacs) List Buffers")

thank you!

Message #20 received at 69987 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> linkov.net>
To: Tomas Hlavaty <tom <at> logand.com>
Cc: 69987 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
Subject: Re: bug#69987: 28.2; *mailcap shell* not in buffer list
Date: Mon, 25 Mar 2024 09:55:37 +0200

> then C-x C-b to show *Buffer List*

In the *Buffer List* you can see all internal buffers
by typing 'I' (Buffer-menu-toggle-internal).

Message #23 received at 69987 <at> debbugs.gnu.org (full text, mbox):

From: Stephen Berman <stephen.berman <at> gmx.net>
To: Juri Linkov <juri <at> linkov.net>
Cc: 69987 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>,
 Tomas Hlavaty <tom <at> logand.com>
Subject: Re: bug#69987: 28.2; *mailcap shell* not in buffer list
Date: Mon, 25 Mar 2024 09:33:23 +0100

On Mon, 25 Mar 2024 09:55:37 +0200 Juri Linkov <juri <at> linkov.net> wrote:

>> then C-x C-b to show *Buffer List*
>
> In the *Buffer List* you can see all internal buffers
> by typing 'I' (Buffer-menu-toggle-internal).

Does the "---" line above the NEWS entry for this feature mean the "List
Buffers" node in the Emacs manual will be updated to mention it?

Steve Berman

Message #28 received at 69987-done <at> debbugs.gnu.org (full text, mbox):

From: Stephen Berman <stephen.berman <at> gmx.net>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 69987-done <at> debbugs.gnu.org, tom <at> logand.com, juri <at> linkov.net
Subject: Re: bug#69987: 28.2; *mailcap shell* not in buffer list
Date: Mon, 25 Mar 2024 14:11:03 +0100

On Mon, 25 Mar 2024 14:55:12 +0200 Eli Zaretskii <eliz <at> gnu.org> wrote:

>> From: Stephen Berman <stephen.berman <at> gmx.net>
>> Cc: Tomas Hlavaty <tom <at> logand.com>,  69987 <at> debbugs.gnu.org,  Eli Zaretskii
>>  <eliz <at> gnu.org>
>> Date: Mon, 25 Mar 2024 09:33:23 +0100
>>
>> On Mon, 25 Mar 2024 09:55:37 +0200 Juri Linkov <juri <at> linkov.net> wrote:
>>
>> >> then C-x C-b to show *Buffer List*
>> >
>> > In the *Buffer List* you can see all internal buffers
>> > by typing 'I' (Buffer-menu-toggle-internal).
>>
>> Does the "---" line above the NEWS entry for this feature mean the "List
>> Buffers" node in the Emacs manual will be updated to mention it?
>
> No, it means we didn't think this worth documenting.  Now reconsidered.

Thanks.

Steve Berman

Message #31 received at 69987-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Stephen Berman <stephen.berman <at> gmx.net>
Cc: 69987-done <at> debbugs.gnu.org, tom <at> logand.com, juri <at> linkov.net
Subject: Re: bug#69987: 28.2; *mailcap shell* not in buffer list
Date: Mon, 25 Mar 2024 14:55:12 +0200

> From: Stephen Berman <stephen.berman <at> gmx.net>
> Cc: Tomas Hlavaty <tom <at> logand.com>,  69987 <at> debbugs.gnu.org,  Eli Zaretskii
>  <eliz <at> gnu.org>
> Date: Mon, 25 Mar 2024 09:33:23 +0100
> 
> On Mon, 25 Mar 2024 09:55:37 +0200 Juri Linkov <juri <at> linkov.net> wrote:
> 
> >> then C-x C-b to show *Buffer List*
> >
> > In the *Buffer List* you can see all internal buffers
> > by typing 'I' (Buffer-menu-toggle-internal).
> 
> Does the "---" line above the NEWS entry for this feature mean the "List
> Buffers" node in the Emacs manual will be updated to mention it?

No, it means we didn't think this worth documenting.  Now reconsidered.

I'm therefore closing this bug.

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