patch 8.1.0679: sign functions do not take buffer argument as documented commit https://github.com/vim/vim/commit/2cbc1a02cb72916dfdbd0d307512c7c3fb766edf Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jan 2 13:40:31 2019 +0100 patch 8.1.0679: sign functions do not take buffer argument as documented Problem: Sign functions do not take buffer argument as documented. Solution: Use get_buf_tv(). (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/3755)

" 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