Subject: bug#9609: Excessive transient region highlighting with highlight-nonselected-windows

From: Lars Ingebrigtsen <[email-masked]>
Date: Wed, 02 Jun 2021 09:48:05 +0200

Glenn Morris <[email-masked]> writes:

> emacs -Q --eval '(progn (setq highlight-nonselected-windows t) (transient-mark-mode -1))' -f make-frame
>
> Two frames open showing the *scratch* buffer, once frame has focus.
>
> With the mouse, click on the "n" of "notes" in the focused frame. Do
> not release the mouse. In the other frame, a region starting or ending
> at "n" is now selected.

I can confirm that this is still present in Emacs 28.

Pretty weird behaviour.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no