commit https://github.com/vim/vim/commit/75537a93e985ef32e6c267b06ce93629855dd983 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Sep 5 22:45:28 2016 +0200 patch 7.4.2332 Problem: Crash when stop_timer() is called in a callback of a callback. Vim hangs when the timer callback uses too much time. Solution: Set tr_id to -1 when a timer is to be deleted. Don't keep calling callbacks forever. (Ozaki Kiichi)