patch 9.0.0949: crash when unletting a variable while listing variables Commit: https://github.com/vim/vim/commit/ef2c325f5e3c437b722bb96bf369ba2a5c541163 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Nov 25 16:31:51 2022 +0000 patch 9.0.0949: crash when unletting a variable while listing variables Problem: Crash when unletting a variable while listing variables. Solution: Disallow changing a hashtable while going over the entries. (closes #11435)