commit https://github.com/vim/vim/commit/bb09ceb95477ecc271854b3fdd8d2776eca66adf Author: Bram Moolenaar <Bram@vim.org> Date: Tue Oct 18 16:27:23 2016 +0200 patch 8.0.0045 Problem: Calling job_stop() right after job_start() does not work. Solution: Block signals while fork is still busy. (Ozaki Kiichi, closes https://github.com/vim/vim/issues/1155)