patch 8.2.4688: new regexp engine does not give an error for "%v" Commit: https://github.com/vim/vim/commit/91ff3d4f52a55a7c37a52aaad524cd9dd12efae4 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Apr 4 18:32:32 2022 +0100 patch 8.2.4688: new regexp engine does not give an error for "\%v" Problem: New regexp engine does not give an error for "\%v". Solution: Check for a value argument. (issue https://github.com/vim/vim/issues/10079)