commit https://github.com/vim/vim/commit/ee39ef0b93d31763d05e54ba99801e3f1a254c0d Author: Bram Moolenaar <Bram@vim.org> Date: Sat Sep 10 19:17:42 2016 +0200 patch 7.4.2361 Problem: Checking for last_timer_id to overflow is not reliable. (Ozaki Kiichi) Solution: Check for the number not going up.

" Vim indent file
" Language:	Scheme
" Maintainer:	Sergey Khorev <sergey.khorev@gmail.com>
" Last Change:	2005 Jun 24

" Only load this indent file when no other was loaded.
if exists("b:did_indent")
  finish
endif

runtime! indent/lisp.vim