zsh-users/zsh-syntax-highlighting — pull request #140 by randomize (2014-03-29 21:23:30+00:00)
Title: Pr fix issue #77

See issue #77 for details.
I know this patch changes fundamental logic in highlighters caching method, but it resolves flooding in region_highlight with "-1 -1 none" guys caused when only the brackets highlighter gets executed over and over(For example when user moves the cursor).