patch 8.2.1426: Vim9: cannot call autoload function in :def function Commit: https://github.com/vim/vim/commit/a177344dc0c337e5b272c1c59d13964a8318bcfa Author: Bram Moolenaar <Bram@vim.org> Date: Wed Aug 12 15:21:22 2020 +0200 patch 8.2.1426: Vim9: cannot call autoload function in :def function Problem: Vim9: cannot call autoload function in :def function. Solution: Load the autoload script. (closes https://github.com/vim/vim/issues/6690)

" vimrc for test_gui_init.vim

" Note that this flag must be added in the .vimrc file, before switching on
" syntax or filetype recognition (when the |gvimrc| file is sourced the system
" menu has already been loaded; the ":syntax on" and ":filetype on" commands
" load the menu too).
set guioptions+=M