bug#10195: 24.0.92; M-w may no longer provide visual feedback

[Eli Zaretskii]

> From: Michael Welsh Duggan <md5i@md5i.com>
> Cc: Jay Berkenbilt <ejb@ql.org>,  10195@debbugs.gnu.org
> Date: Sat, 03 Dec 2011 00:31:36 -0500
> 
> >> Type some text.  Save it in the kill ring with
> >> 
> >> C-a C-SPC M-f M-w
> >> 
> >> Then do this again:
> >> 
> >> M-w
> >> 
> >> In emacs 23, the cursor would bounce between the point and the mark the
> >> second time M-w was pressed, since the highlighting of the region turned
> >> off after the first time.  Or, if transient-mark-mode is nil, then the
> >> first M-w would bounce the cursor between the point and mark.  In
> >> emacs24, M-w seems to never cause the cursor to bounce between the point
> >> and mark.
> >
> > It still does that to me, in the current trunk tip.
> >
> > Does it work in "emacs -Q" for you?

For the record, Jay replied off-list that "emacs -Q" has the same
problem for him.

> It appears to be inconsistent.  Sometimes it will happen, sometimes it
> will not.  I first noticed this many months ago, but at the time
> couldn't cause it to happen on command, and as such forgot about it for
> a while.  Today, I tried again with emacs -Q built from bzr revno
> 106562.  I definitely see this behavior, without fail.
> 
>   emacs -Q
>   (In *scratch* buffer)
>   C-p C-p C-p C-SPC C-e M-w

This is not the right recipe.  The first M-w does NOT show the region
by momentarily moving point to its other end, because the default is
to have transient-mark-mode on, which already shows the region.  You
need to type M-w twice or more in a row to see point move.

Anyway, I don't see it on any machine to which I have access, FWIW.  I
tried both unoptimized and optimized builds, on Windows and on
GNU/Linux, and they all behave as expected.