GNU bug report logs - #13027
Activating mark does not run mark activation hook

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Kelly Dean <kellydeanch <at> yahoo.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Activating mark does not run mark activation hook
Date: Thu, 29 Nov 2012 02:08:19 -0800 (PST)

In 24.2, from emacs -Q
(add-hook 'deactivate-mark-hook (lambda () (message "Deactivate mark hook called.")))
(add-hook 'activate-mark-hook (lambda () (message "Activate mark hook called.")))
C-SPC C-SPC C-SPC C-SPC
In *Messages* you get:

Mark set
Activate mark hook called.
Deactivate mark hook called.
Mark deactivated
Mark activated
Deactivate mark hook called.
Mark deactivated

Notice that the second "Activate mark hook called" is missing.

simple.el has:
(defun activate-mark ()
  "Activate the mark."
  (when (mark t)
    (setq mark-active t)
    (unless transient-mark-mode
      (setq transient-mark-mode 'lambda))))

The bug is fixed by changing that to:
(defun activate-mark ()
  "Activate the mark."
  (when (mark t)
    (setq mark-active t)
    (run-hooks 'activate-mark-hook)
    (unless transient-mark-mode
      (setq transient-mark-mode 'lambda))))

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