patch 9.0.0021: invalid memory access when adding word to spell word list Commit: https://github.com/vim/vim/commit/5e59ea54c0c37c2f84770f068d95280069828774 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jul 1 22:26:20 2022 +0100 patch 9.0.0021: invalid memory access when adding word to spell word list Problem: Invalid memory access when adding word with a control character to the internal spell word list. Solution: Disallow adding a word with control characters or a trailing slash.