patch 8.2.1355: Vim9: no error using :let for options and registers Commit: https://github.com/vim/vim/commit/c2ee44cc382d4b097f51ea3251f00fb35493ea4f Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 2 16:59:00 2020 +0200 patch 8.2.1355: Vim9: no error using :let for options and registers Problem: Vim9: no error using :let for options and registers. Solution: Give an error. (closes https://github.com/vim/vim/issues/6568)