patch 8.1.1015: quickfix buffer shows up in list, can't get buffer number commit https://github.com/vim/vim/commit/647e24ba3dbf7ff448aa471b1a659a18267ae056 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Mar 17 16:39:46 2019 +0100 patch 8.1.1015: quickfix buffer shows up in list, can't get buffer number Problem: Quickfix buffer shows up in list, can't get buffer number. Solution: Make the quickfix buffer unlisted when the quickfix window is closed. get the quickfix buffer number with getqflist(). (Yegappan Lakshmanan, closes #4113)

" Vim filetype plugin file
" Language:     Vim's quickfix window
" Maintainer:   Lech Lorens <Lech.Lorens@gmail.com>
" Last Changed: 30 Apr 2012

if exists("b:did_ftplugin")
  finish
endif

" Don't load another plugin for this buffer
let b:did_ftplugin = 1

let b:undo_ftplugin = "set stl<"

" Display the command that produced the list in the quickfix window:
setlocal stl=%t%{exists('w:quickfix_title')?\ '\ '.w:quickfix_title\ :\ ''}\ %=%-15(%l,%c%V%)\ %P