patch 8.1.1675: listener list not correctly updated on listener_remove() commit https://github.com/vim/vim/commit/7b73f914c4fc5a3f7ad97b678cc8137f964e3d62 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jul 13 13:03:02 2019 +0200 patch 8.1.1675: listener list not correctly updated on listener_remove() Problem: Listener list not correctly updated on listener_remove(). Solution: Only set "prev" when not removing a listener. Return one if the listener was found and removed.

" Vim compiler file
" Compiler:     ATT dot
" Maintainer:	Marcos Macedo <bar4ka@bol.com.br>
" Last Change:	2004 May 16

if exists("current_compiler")
  finish
endif
let current_compiler = "dot"

if exists(":CompilerSet") != 2		" older Vim always used :setlocal
  command -nargs=* CompilerSet setlocal <args>
endif

CompilerSet makeprg=dot\ -T$*\ \"%:p\"\ -o\ \"%:p:r.$*\"