commit https://github.com/vim/vim/commit/4f416e41243ca151b95d39d81ce23d00b1484755 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Aug 16 16:08:18 2016 +0200 patch 7.4.2217 Problem: When using matchaddpos() a character after the end of the line can be highlighted. Solution: Only highlight existing characters. (Hirohito Higashi)