patch 8.0.0849: crash when job exit callback wipes the terminal commit https://github.com/vim/vim/commit/3c3a80dc59ccc0e0aabb9c8bd58ea84a801dbfc1 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Aug 3 17:06:45 2017 +0200 patch 8.0.0849: crash when job exit callback wipes the terminal Problem: Crash when job exit callback wipes the terminal. Solution: Check for b_term to be NULL. (Yasuhiro Matsumoto, closes https://github.com/vim/vim/issues/1922) Implement options for term_start() to be able to test. Make term_wait() more reliable.