patch 8.2.1969: Vim9: map() may change the list or dict item type Commit: https://github.com/vim/vim/commit/ea696852e7abcdebaf7f17a7f23dc90df1f5e2ed Author: Bram Moolenaar <Bram@vim.org> Date: Mon Nov 9 18:31:39 2020 +0100 patch 8.2.1969: Vim9: map() may change the list or dict item type Problem: Vim9: map() may change the list or dict item type. Solution: Add mapnew().