Re: Strange effect selecting rectangular region

[Michael Heerdegen]

Angelo Graziosi <angelo.g0@libero.it> writes:

> They are few master builds I notice this strange effect. 
>
> Selecting a rectangular region with 'M-C drag mouse-L' produces the
> rectangular region but when the keys (M, C, mouse-L) are released the
> related lines appears in yellows as the attached screenshot. This
> happens often not always and the only way to get that the yellow
> disappears is to restart Emacs (I have not found a recipe to do that
> in Emacs).

The highlighting in your screenshot looks like the secondary selection
one gets with M-mouse-1.

I get the behavior you describe when I release the Control key too early
(i.e. before the mouse button).

Michael.