bug#7854: 24.0.50; Buffer *temp* modified; kill anyway?

[Reiner Steib <reiner.steib@gmx.de>]

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug.  If you can, give
a recipe starting from `emacs -Q':

(a) emacs -Q -eval \
     "(defalias 'tramp-completion-file-name-handler 'file-name-non-special)"

     I added this alias because I couldn't prevent tramp kicking in
     (which adds quite a long delay the first time tramp is loaded) by
     simply customizing `tramp-mode' to nil, as I expected to from the
     doc string. Then I found that `file-name-handler-alist' has entries
     for `tramp-completion-file-name-handler' and
     `tramp-file-name-handler', and concluded that aliasing these to the
     default `file-name-non-special' might do the trick.

(b) M-x cvs-update RET

(c) I get a prompt like this:

     "Buffer  *temp* modified; kill anyway? "

(d) With M-x toggle-debug-on-quit RET, I get the following:

    Debugger entered--Lisp error: (quit)
      yes-or-no-p("Buffer  *temp*<4> modified; kill anyway? ")
      kill-buffer(#<buffer  *temp*<4>>)
      byte-code("[...]" [temp-buffer buffer-name kill-buffer] 2)
      byte-code([...] [temp-buffer cvs-cvsrc-file cmd --cl-dolist-temp-- sym
        val generate-new-buffer " *temp*" ((byte-code "..." [temp-buffer
        buffer-name kill-buffer] 2)) insert-file-contents ("cvs" "checkout"
        "status" "log" "diff" "tag" "add" "commit" "remove" "update") nil
        re-search-forward "^" "\\(\\s-+\\(.*\\)\\)?$" t intern "cvs-"
        "-flags" split-string-and-unquote match-string 2 "" 0 error
        "cvs-flags-defaults accessing a non-cvs-flags" 1 cvs-cvs-flags "-f"
        cvs-partition #[(x) "..." [x ("-q" "-Q" "-f")] 2] cvs-flags-query
        noquery value index cl-struct-cvs-flags-tags] 9)
      cvs-reread-cvsrc()
      execute-extended-command(nil)
      call-interactively(execute-extended-command nil nil)


In GNU Emacs 24.0.50.1 (i386-mingw-nt6.0.6002)
  of 2011-01-10 on 3249CTO
Windowing system distributor `Microsoft Corp.', version 6.0.6002
configured using `configure --with-gcc (4.4) --no-opt --cflags
-Ic:/imagesupport/include'

(I have the same behavior with 23.2)

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: DEU
   value of $XMODIFIERS: nil
   locale-coding-system: cp1252
   default enable-multibyte-characters: t

Major mode: Debugger

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 c v s - u p <tab> <return> C-g M-x t o g g l e
- d e b u g - o n - q u i t <return> M-x <up> <up>
<return> C-g 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.
Quit
Debug on Quit enabled globally
Entering debugger...

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr message 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
debug cus-start cus-load pcvs-parse pcvs-info pcvs-defs easymenu
easy-mmode pcvs-util ewoc tooltip ediff-hook vc-hooks lisp-float-type
mwheel dos-w32 disp-table ls-lisp w32-win w32-vars 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 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 multi-tty emacs)