Subject: bug#10196: 24.0.92; prolog-mode error

From: Simen Heggestøyl <[email-masked]>
Date: Fri, 02 Dec 2011 12:03:48 +0100

Starting from 'emacs -Q', running 'M-x prolog-mode' gives the following
 error message:
       prolog-find-value-by-system: Wrong type argument: bufferp, nil

 In GNU Emacs 24.0.92.1 (i686-pc-linux-gnu, GTK+ Version 2.24.8)
  of 2011-12-02 on d610
 Windowing system distributor `The X.Org Foundation', version 
 11.0.11102000
 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_US.UTF-8
   value of $XMODIFIERS: nil
   locale-coding-system: utf-8-unix
   default enable-multibyte-characters: t

 Major mode: Prolog

 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:
 M-x p r o l <tab> <return> M-x r e p o r t - e m <tab>
 <return>

 Recent messages:
 For information about GNU Emacs and the GNU system, type C-h C-a.
 prolog-find-value-by-system: Wrong type argument: bufferp, nil

 Load-path shadows:
 None found.

 Features:
 (shadow sort gnus-util mail-extr message format-spec rfc822 mml mml-sec
 mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045
 ietf-drums mm-util mail-prsvr mailabbrev mail-utils gmm-utils 
 mailheader
 emacsbug prolog align easymenu comint regexp-opt ring time-date tooltip
 ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd
 fontset image fringe 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 loaddefs button faces cus-face files
 text-properties overlay sha1 md5 base64 format env code-pages mule
 custom widget hashtable-print-readable backquote make-network-process
 dbusbind dynamic-setting system-font-setting font-render-setting
 move-toolbar gtk x-toolkit x multi-tty emacs)