GNU bug report logs - #7885
23.2.91; comint-previous/next-matching-input-from-input don't return current line

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From: Reuben Thomas <rrt <at> sc3d.org>
To: 7885 <at> debbugs.gnu.org
Subject: bug#7885: 23.2.91; comint-previous/next-matching-input-from-input don't return current line
Date: Sat, 22 Jan 2011 13:47:04 +0000

If I run `comint-previous-matching-input-from-input' (which I have bound
to M-p) then `comint-next-matching-input-from-input' (which I have bound
to M-n), I would expect to get back to the line I'm currently typing,
but instead it goes past it to the next matching input (cycling round to
the end of the input ring).

This is logical from the point of view of what the functions say they
do, but confound my expectations, which are governed by the behavior of
the equivalent readline functions, history-search-{forward,backward}.

I cannot therefore confidently say this is a bug, but I can say it's not
what I expect.

I suppose that if the current line were already considered part of the
input ring then I would get the behavior I expect in this case, but that
would make this input ring behave differently from every other Emacs
input ring, so I'm really not sure what to suggest.


In GNU Emacs 23.2.91.4 (i686-pc-linux-gnu, GTK+ Version 2.22.0)
 of 2011-01-13 on canta
Windowing system distributor `The X.Org Foundation', version 11.0.10900000
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_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Debugger

Minor modes in effect:
  recentf-mode: t
  show-paren-mode: t
  savehist-mode: t
  minibuffer-electric-default-mode: t
  iswitchb-mode: t
  icomplete-mode: t
  global-whitespace-mode: t
  global-auto-revert-mode: t
  desktop-save-mode: t
  yas/global-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-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
C-x b m a i n <return> M-x g f d b <backspace> <backspace> 
<backspace> d b <return> <return> M-p M-p M-n M-n M-n 
M-n M-n M-n M-n M-n M-n M-n M-n M-> C-a C-e M-n M-n 
M-n M-n M-n M-n M-n M-n M-n M-p M-p M-p M-p M-p M-p 
M-p M-p M-p M-p M-p M-p M-p M-p M-p M-p M-p M-p M-p 
M-p M-p M-p M-p M-p M-p M-p M-p M-p M-p M-p M-p M-p 
M-p M-n <backspace> <backspace> M-p M-n M-p M-n <M-backspace> 
M-p M-n M-p M-n <M-backspace> M-x b u g - <backspace> 
<backspace> <backspace> <backspace> e m a c s - <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
r e p o r t - e m a c s - b u g <return>

Recent messages:
Loading make-mode...done
Quit [2 times]
Type "q" to restore this window.
Quit
Making completion list...
Loading autoconf...done
Loading python...done
Loading vc-cvs...done
Lazy desktop load complete
Quit

Load-path shadows:
/home/rrt/.emacs.d/elpa/ruby-mode-1.1/ruby-mode hides /usr/share/emacs-snapshot/site-lisp/ruby1.8-elisp/ruby-mode
/home/rrt/local/share/emacs/site-lisp/popup hides /usr/local/share/emacs/23.2.91/site-lisp/auto-complete/popup
/home/rrt/local/share/emacs/site-lisp/fuzzy hides /usr/local/share/emacs/23.2.91/site-lisp/auto-complete/fuzzy
/home/rrt/.emacs.d/elpa/css-mode-1.0/css-mode hides /usr/local/share/emacs/23.2.91/site-lisp/css-mode/css-mode
/home/rrt/.emacs.d/elpa/dictionary-1.8.7/link hides /usr/local/share/emacs/23.2.91/site-lisp/dictionary-el/link
/home/rrt/.emacs.d/elpa/dictionary-1.8.7/connection hides /usr/local/share/emacs/23.2.91/site-lisp/dictionary-el/connection
/home/rrt/.emacs.d/elpa/dictionary-1.8.7/dictionary-init hides /usr/local/share/emacs/23.2.91/site-lisp/dictionary-el/dictionary-init
/home/rrt/.emacs.d/elpa/dictionary-1.8.7/dictionary hides /usr/local/share/emacs/23.2.91/site-lisp/dictionary-el/dictionary
/home/rrt/.emacs.d/elpa/css-mode-1.0/css-mode hides /usr/local/share/emacs/23.2.91/lisp/textmodes/css-mode
/home/rrt/.emacs.d/elpa/ruby-mode-1.1/ruby-mode hides /usr/local/share/emacs/23.2.91/lisp/progmodes/ruby-mode
/home/rrt/.emacs.d/elpa/css-mode-1.0/css-mode hides /usr/share/emacs/site-lisp/css-mode/css-mode
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex-info hides /usr/share/emacs/site-lisp/auctex/tex-info
/usr/local/share/emacs/23.2.91/site-lisp/auctex/context-nl hides /usr/share/emacs/site-lisp/auctex/context-nl
/usr/local/share/emacs/23.2.91/site-lisp/auctex/context-en hides /usr/share/emacs/site-lisp/auctex/context-en
/usr/local/share/emacs/23.2.91/site-lisp/auctex/latex hides /usr/share/emacs/site-lisp/auctex/latex
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex-mik hides /usr/share/emacs/site-lisp/auctex/tex-mik
/usr/local/share/emacs/23.2.91/site-lisp/dictionary-el/lpath hides /usr/share/emacs/site-lisp/auctex/lpath
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex-buf hides /usr/share/emacs/site-lisp/auctex/tex-buf
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex-jp hides /usr/share/emacs/site-lisp/auctex/tex-jp
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex-bar hides /usr/share/emacs/site-lisp/auctex/tex-bar
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex hides /usr/share/emacs/site-lisp/auctex/tex
/usr/local/share/emacs/23.2.91/site-lisp/auctex/multi-prompt hides /usr/share/emacs/site-lisp/auctex/multi-prompt
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex-fptex hides /usr/share/emacs/site-lisp/auctex/tex-fptex
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex-font hides /usr/share/emacs/site-lisp/auctex/tex-font
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex-fold hides /usr/share/emacs/site-lisp/auctex/tex-fold
/usr/local/share/emacs/23.2.91/site-lisp/auctex/texmathp hides /usr/share/emacs/site-lisp/auctex/texmathp
/usr/local/share/emacs/23.2.91/site-lisp/auctex/context hides /usr/share/emacs/site-lisp/auctex/context
/usr/local/share/emacs/23.2.91/site-lisp/auctex/font-latex hides /usr/share/emacs/site-lisp/auctex/font-latex
/usr/local/share/emacs/23.2.91/site-lisp/auctex/bib-cite hides /usr/share/emacs/site-lisp/auctex/bib-cite
/usr/local/share/emacs/23.2.91/site-lisp/auctex/toolbar-x hides /usr/share/emacs/site-lisp/auctex/toolbar-x
/usr/local/share/emacs/23.2.91/site-lisp/auctex/tex-style hides /usr/share/emacs/site-lisp/auctex/tex-style

Features:
(shadow sort mail-extr message sendmail ecomplete rfc822 mml mml-sec
password-cache mm-decode mm-bodies mm-encode mailcap mail-parse rfc2231
rfc2047 rfc2045 qp ietf-drums mailabbrev nnheader gnus-util netrc
time-date mm-util mail-prsvr gmm-utils mailheader canlock sha1 hex-util
hashcash mail-utils vc-cvs python-21 python autoconf autoconf-mode
help-mode view make-mode inform-mode info emacsbug gdb-ui byte-opt
warnings bytecomp byte-compile bindat json gud sh-script executable
vc-git jka-compr face-remap filladapt flyspell completing-help recentf
tree-widget wid-edit uniquify paren savehist minibuf-eldef iswitchb
icomplete whitespace autorevert time cus-start cus-load desktop server
php-mode etags cc-langs cc-mode cc-fonts cc-menus cc-cmds cc-styles
cc-align cc-engine cc-vars cc-defs speedbar sb-image ezimage dframe
lua-mode regexp-opt comint ring ropemacs pymacs etags-update
smart-quotes ispell auto-dictionary-autoloads css-mode-autoloads
dictionary-autoloads diff-git-autoloads dired-isearch-autoloads
full-ack-autoloads guess-style-autoloads http-post-simple-autoloads
js2-mode-autoloads magit-autoloads mv-shell-autoloads
ruby-mode-autoloads package reporter advice advice-preload yasnippet
help-fns derived edmacro kmacro easymenu assoc cl cl-19 muse-autoloads
emacs-goodies-el emacs-goodies-custom emacs-goodies-loaddefs easy-mmode
bbdb-autoloads preview-latex tex-site auto-loads tooltip ediff-hook
vc-hooks lisp-float-type mwheel x-win x-dnd font-setting tool-bar dnd
fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer
select scroll-bar mldrag 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 loaddefs button minibuffer faces
cus-face files text-properties overlay md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote
make-network-process dbusbind system-font-setting font-render-setting
gtk x-toolkit x multi-tty emacs)

-- 
http://rrt.sc3d.org/

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