patch 8.1.0877: new buffer used every time the quickfix window is opened commit https://github.com/vim/vim/commit/ee8188fc74a7cf9ee7acb634b2bb7a032d0cb24c Author: Bram Moolenaar <Bram@vim.org> Date: Tue Feb 5 21:23:04 2019 +0100 patch 8.1.0877: new buffer used every time the quickfix window is opened Problem: New buffer used every time the quickfix window is opened. Solution: Reuse the buffer. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/3902)

" 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