bug#29772: 25.1; Display artefacts caused by scroll-bar-mode 'left with tool-bar-mode nil

[Alan Third]

On Tue, Dec 19, 2017 at 02:05:45PM +0000, Christopher Allen wrote:
> Run the following command to open a long file with toolbar disabled and
> left-hand-side scrollbars:
> 
> $ emacs -Q -eval "(custom-set-variables '(scroll-bar-mode (quote
> left)) '(tool-bar-mode nil))" ~/.bash_history
> 
> (Substitute any long file in place of .bash_history; ideally it should
> be >10 windows tall.)
> 
> Then scroll up and down by any means (cursor keys, dragging scrollbar
> handle, or using scrollwheel / trackpad gestures).
> 
> Observe that the scrollbar leaves behind artefacts (see attached
> example).  Such artifacts do not seem to appear when the toolbar is
> present; I note in that case the scrollbar appears a few pixels to the
> left.

Hi, I can’t replicate this in Emacs 26. I think it’s probably been
fixed as part of other UI work.

Can you try again with the Emacs 26 pre‐test?
-- 
Alan Third