commit https://github.com/vim/vim/commit/9ec021a2b0dd35ba744a8e2a9430a643c85b922a Author: Bram Moolenaar <Bram@vim.org> Date: Sat Dec 12 16:23:29 2015 +0100 patch 7.4.970 Problem: Rare crash in getvcol(). (Timo Mihaljov) Solution: Check for the buffer being NULL in init_preedit_start_col. (Hirohito Higashi, Christian Brabandt)