patch 9.0.1317: crash when using an unset object variable Commit: https://github.com/vim/vim/commit/552bdca781bd202012224316ffae3439aac83b7b Author: Bram Moolenaar <Bram@vim.org> Date: Fri Feb 17 21:08:50 2023 +0000 patch 9.0.1317: crash when using an unset object variable Problem: Crash when using an unset object variable. Solution: Give an error instead. (closes https://github.com/vim/vim/issues/12005)