bug#14127: 24.3.50; gdb-mode error when formatting error message containing "%"

[<rcopley@gmail.com>]

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In gdb interaction mode, in situations where entering “p %rdx” should print “A syntax error in expression, near `%rdx'”, instead, it signals an error “Not enough arguments for format string”. Part of a user-entered string is used as a format string in the call to `message’. See attached for a fix.


In GNU Emacs 24.3.50.1 (i386-mingw-nt6.2.9200)
 of 2013-03-28 on MACHINE
Bzr revision: 112162 yamaoka@jpl.org-20130327221236-v7x05yocnh6vsqel
Windowing system distributor `Microsoft Corp.', version 6.2.9200
Configured using:
 `configure --with-gcc (4.7) --cflags -I c:/gnuwin32/include --ldflags
 -L c:/gnuwin32/lib'

 

Important settings:
  value of $LANG: ENG
  locale-coding-system: cp1252
  default enable-multibyte-characters: t

 

Major mode: Emacs-Lisp

 

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-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

 

Recent input:
C-x C-f g : / e m a c s / t r u n k / l i s p / p r 
o g m o d e s / g d b - m i . e l <return> M-g M-g 
2 4 1 2 <return> M-x r e p o r t - e m a c s - b u g <return>

 

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

 

Load-path shadows:
None found.

 

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils vc-bzr time-date tooltip ediff-hook
vc-hooks lisp-float-type mwheel dos-w32 ls-lisp w32-common-fns
disp-table w32-win w32-vars tool-bar dnd fontset image regexp-opt fringe
tabulated-list newcomment lisp-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 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 w32notify w32 multi-tty emacs)

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=== modified file 'lisp/progmodes/gdb-mi.el'
*** lisp/progmodes/gdb-mi.el	2013-03-11 17:13:39 +0000
--- lisp/progmodes/gdb-mi.el	2013-04-02 23:24:43 +0000
***************
*** 2409,2415 ****
  	;; MI error - send to minibuffer
  	(when (eq type 'error)
            ;; Skip "msg=" from `output-field'
!           (message (read (substring output-field 4)))
            ;; Don't send to the console twice.  (If it is a console error
            ;; it is also in the console stream.)
            (setq output-field nil)))
--- 2409,2415 ----
  	;; MI error - send to minibuffer
  	(when (eq type 'error)
            ;; Skip "msg=" from `output-field'
!           (message "%s" (read (substring output-field 4)))
            ;; Don't send to the console twice.  (If it is a console error
            ;; it is also in the console stream.)
            (setq output-field nil)))