patch 8.2.2921: E704 for script local variable is not backwards compatible Commit: https://github.com/vim/vim/commit/b54abeeafb074248597878a874fed9a66b114c06 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jun 2 11:49:23 2021 +0200 patch 8.2.2921: E704 for script local variable is not backwards compatible Problem: E704 for script local variable is not backwards compatible. (Yasuhiro Matsumoto) Solution: Only give the error in Vim9 script. Also check for function-local variable.