patch 8.2.2157: Vim9: can delete a Vim9 script variable from a function Commit: https://github.com/vim/vim/commit/9aed729fe9e62536236875a42fb170d2c8fb3046 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Dec 18 15:38:00 2020 +0100 patch 8.2.2157: Vim9: can delete a Vim9 script variable from a function Problem: Vim9: can delete a Vim9 script variable from a function. Solution: Check the variable is defined in Vim9 script. (closes https://github.com/vim/vim/issues/7483)