commit https://github.com/vim/vim/commit/7a5c46a9df7ef01a4f6a620861c35400d5ad28d9 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Mar 16 20:41:21 2016 +0100 patch 7.4.1580 Problem: Crash when using function reference. (Luchr) Solution: Set initial refcount. (Ken Takata, closes https://github.com/vim/vim/issues/690)

" Vim indent file
" Language:	Mail
" Maintainer:	Bram Moolenaar
" Last Change:	2009 Jun 03

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

" What works best is auto-indenting, disable other indenting.
" For formatting see the ftplugin.
setlocal autoindent nosmartindent nocindent indentexpr=