Subject: 24.3.93; Tab completion in gud-gdb at the start of a line overwrites the prompt.
From: Mat Smiglarski <[email-masked]>
To: [email-masked]
Date: Sun, 17 Aug 2014 11:07:42 +0100
List-Id: <debbugs-submit.debbugs.gnu.org>

Hello,
Tab completion in gud-gdb replaces the prompt with the completed
string. As a result this string is not sent to the gdb process.

This bug does not occur in 24.3.1. It does occur on trunk and
24.3.92, as well as 24.3.93.

To reproduce:

1. emacs -Q
2. M-: (gud-gdb "gdb")
3. Type the following at the gdb prompt "hel<TAB><RET>"

What happens is the command "help" is correctly completed, but the
prompt "(gdb)" is overwritten. This completed
string has the face "comint-highlight-prompt" and is not evaluated by 
the gdb process.

For what it is worth, the bug does not occur with "M-x gdb", only "M-x
gud-gdb".

Regards,
Mat

In GNU Emacs 24.3.93.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.8)
  of 2014-08-16 on zz
Windowing system distributor `The X.Org Foundation', version 
11.0.11501000
System Description:	Ubuntu 14.04.1 LTS

Configured using:
  `configure 'CFLAGS=-O0 -g3''

Important settings:
   value of $LC_CTYPE: en_US.UTF-8
   value of $LANG: en_US.UTF-8
   value of $XMODIFIERS: @im=ibus
   locale-coding-system: utf-8-unix

Major mode: Debugger

Minor modes in effect:
   tooltip-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

Recent input:
M-x M-p g u d - g d b <return> C-a M-f C-k <return>
h e <tab> <return> M-x r e p <tab> - e - b <tab> <
return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
user-error: Beginning of history; no preceding item
Making completion list...

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
help-fns mail-prsvr mail-utils help-mode easymenu gud easy-mmode comint
ansi-color ring 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 79181 7387)
  (symbols 48 18300 0)
  (miscs 40 49 200)
  (strings 32 11682 4841)
  (string-bytes 1 317029)
  (vectors 16 10558)
  (vector-slots 8 397115 7916)
  (floats 8 66 210)
  (intervals 56 233 0)
  (buffers 960 13)
  (heap 1024 17278 783))