Package: emacs;
Reported by: "Olsen, Stuart J" <stuart_olsen <at> txstate.edu>
Date: Mon, 28 Oct 2013 19:04:02 UTC
Severity: minor
Tags: confirmed, fixed, patch
Found in versions 24.3, 23.3
Fixed in version 28.1
Done: Lars Ingebrigtsen <larsi <at> gnus.org>
Bug is archived. No further changes may be made.
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: "Olsen, Stuart J" <stuart_olsen <at> txstate.edu> To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org> Subject: 23.3; ansi-term: prompt moves to bottom of screen Date: Mon, 28 Oct 2013 19:02:42 +0000
In ansi-term, once the screen has filled with output -- that is, when the prompt for the shell is at the bottom of the window -- if one scrolls the buffer so that the prompt is in the middle of the screen, typing anything into the terminal buffer causes the prompt to snap back down to the bottom of the window. This is helpful if the prompt is not in view, but is rather obnoxious if it is, especially when using ZSH, which displays completions and other information below the prompt, meaning that that information is hidden once the buffer fills to the size of the window. To reproduce the bug, issue `emacs -Q', run the `ansi-term' command, select an appropriate shell (I have observed this behaviour with both GNU bash and ZSH), and issue enough commands to the shell to fill the window. Once the window has been filled, scroll the buffer so the prompt appears above the bottom of the window. Send any input to the shell, and the prompt will snap to the bottom of the window. It may be helpful to note that term.el references at line 1005 a variable named `term-scroll-to-bottom-on-input', which does not appear to be referenced anywhere within the code, and which is undefined in my version of Emacs. In GNU Emacs 23.3.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.10) of 2013-05-16 on panlong, modified by Debian Windowing system distributor `The X.Org Foundation', version 11.0.11103000 configured using `configure '--build' 'x86_64-linux-gnu' '--build' 'x86_64-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/emacs23:/etc/emacs:/usr/local/share/emacs/23.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.3/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.3/leim' '--with-crt-dir=/usr/lib/x86_64-linux-gnu' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=x86_64-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2' 'LDFLAGS=-g' 'CPPFLAGS=-D_FORTIFY_SOURCE=2'' Important settings: value of $LC_ALL: en_US.UTF-8 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_US.UTF-8 value of $XMODIFIERS: nil locale-coding-system: utf-8-unix default enable-multibyte-characters: t Major mode: Term Minor modes in effect: tooltip-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-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent input: M-x a n s i - t e r m <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> <return> l s <return> <down-mouse-5> <mouse-5> <double-down-mouse-5> <double-mouse-5> <triple-down-mouse-5> <triple-mouse-5> s <down-mouse-5> <mouse-5> <double-down-mouse-5> <double-mouse-5> s <down-mouse-5> <mouse-5> <double-down-mouse-5> <double-mouse-5> <triple-down-mouse-5> <triple-mouse-5> s s s s <backspace> <backspace> <backspace> <backspace> <backspace> <backspace> <backspace> <backspace> <backspace> <backspace> <backspace> M-x s u b <tab> C-g <help-echo> <help-echo> <help-echo> <help-echo> <help-echo> <help-echo> <menu-bar> <help-menu> <send-emacs-bug-report> Recent messages: Loading /var/cache/dictionaries-common/emacsen-ispell-default.el (source)...done Loading debian-ispell...done Loading /var/cache/dictionaries-common/emacsen-ispell-dicts.el (source)...done Loading /etc/emacs/site-start.d/50dictionaries-common.el (source)...done Loading /etc/emacs/site-start.d/50emacs-goodies-el.el (source)...done Loading /etc/emacs/site-start.d/50psvn.el (source)...done Loading /etc/emacs/site-start.d/50slime.el (source)... Loading /usr/share/emacs23/site-lisp/slime/slime-autoloads.elc...done Loading /etc/emacs/site-start.d/50slime.el (source)...done For information about GNU Emacs and the GNU system, type C-h C-a. Load-path shadows: /usr/share/emacs/23.3/site-lisp/debian-startup hides /usr/share/emacs/site-lisp/debian-startup /usr/share/emacs23/site-lisp/dictionaries-common/ispell hides /usr/share/emacs/23.3/lisp/textmodes/ispell /usr/share/emacs23/site-lisp/dictionaries-common/flyspell hides /usr/share/emacs/23.3/lisp/textmodes/flyspell Features: (shadow sort mail-extr message sendmail regexp-opt ecomplete rfc822 mml easymenu 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 wid-edit mailheader canlock sha1 hex-util hashcash mail-utils emacsbug term disp-table ehelp electric ring slime-autoloads emacs-goodies-el emacs-goodies-custom emacs-goodies-loaddefs easy-mmode 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)
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997,2003 nCipher Corporation Ltd,
1994-97 Ian Jackson.