patch 8.2.1949: Vim9: using extend() on null dict is silently ignored Commit: https://github.com/vim/vim/commit/348be7ed07d164970ec0004bc278e254eb0cf5bf Author: Bram Moolenaar <Bram@vim.org> Date: Wed Nov 4 11:36:35 2020 +0100 patch 8.2.1949: Vim9: using extend() on null dict is silently ignored Problem: Vim9: using extend() on null dict is silently ignored. Solution: Give an error message. Initialize a dict variable with an empty dictionary. (closes #7251)