patch 8.2.1952: Vim9: crash when using a NULL dict key Commit: https://github.com/vim/vim/commit/c7f7f6db3e9d3b6b723ed17d5244c83859583832 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Nov 4 13:38:28 2020 +0100 patch 8.2.1952: Vim9: crash when using a NULL dict key Problem: Vim9: crash when using a NULL dict key. Solution: Use a NULL dict key like an empty string. (closes https://github.com/vim/vim/issues/7249)