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

From: Reiner Steib
Subject: bug#7854: 24.0.50; Buffer *temp* modified; kill anyway?
Date: Mon, 17 Jan 2011 16:43:27 +0100
User-agent: Internet Messaging Program (IMP) H3 (4.1.5)

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)
     call-interactively(execute-extended-command nil nil)

In GNU Emacs (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

(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 <

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Debug on Quit enabled globally
Entering debugger...

Load-path shadows:
None found.

(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)

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