Subject: bug#21781: 25.0.50; Cocoa Emacs Visual Bell leaves "Ghost Square"

From: Eric Brown <[email-masked]>
Date: Wed, 28 Oct 2015 22:28:14 -0500

When visual bell is enabled, a "ghost square" is left over the text
after the white square flashes.

What do I expect: The text should re-draw.

(OS X El Capitan)