bug#10133: 24.0.91; mark-active

[Richard Copley <rcopley@gmail.com>]

The value of mark-active isn't always correct. (I first noticed this
when I typed `d' in a vc-log-view buffer and got the diff between the
revisions at point and mark, not the diff for the change at point.)

From `emacs -Q',

M-x transient-mark-mode <return>
=> Transient-Mark mode disabled

M-: mark-active <return>
=> nil

C-SPC
=> Mark set

M-: mark-active <return>
=> t


In GNU Emacs 24.0.91.1 (i386-mingw-nt5.1.2600)
 of 2011-11-25 on 57172UHB
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.6) --cflags -fno-omit-frame-pointer'

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

Major mode: Lisp Interaction

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

Recent input:
M-x t r a n s i e n t - m a r k - m o d e <return>
M-: m a r k - a c t i v e <return> C-SPC M-: m a r
k - a c t i v e <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.
Transient-Mark mode disabled
nil
Mark set
t

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr message format-spec rfc822 mml easymenu
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 cus-start cus-load time-date 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 minibuffer 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
multi-tty emacs)