patch 8.1.1812: reading a truncted undo file hangs Vim commit https://github.com/vim/vim/commit/fb06d767a8d76eead5391302fc88115d6e3879d8 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 4 18:55:35 2019 +0200 patch 8.1.1812: reading a truncted undo file hangs Vim Problem: Reading a truncted undo file hangs Vim. Solution: Check for reading EOF. (closes https://github.com/vim/vim/issues/4769)

" Vim filetype plugin file
" Language:	gdb
" Maintainer:	Michaël Peeters <NOSPAMm.vim@noekeon.org>
" Last Changed: 26 Oct 2017

if exists("b:did_ftplugin") | finish | endif
let b:did_ftplugin = 1

setlocal commentstring=#%s

" Undo the stuff we changed.
let b:undo_ftplugin = "setlocal cms<"