commit https://github.com/vim/vim/commit/e429e70f050cb2941f1f8427cf918b68444c904e Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jun 10 19:49:14 2016 +0200 patch 7.4.1914 Problem: Executing autocommands while using the signal stack has a high chance of crashing Vim. Solution: Don't invoke autocommands when on the signal stack.