patch 9.0.1320: checking the type of a null object causes a crash Commit: https://github.com/vim/vim/commit/0917e867632199883c07c2d7534f7091b1d12607 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Feb 18 14:42:44 2023 +0000 patch 9.0.1320: checking the type of a null object causes a crash Problem: Checking the type of a null object causes a crash. Solution: Don't try to get the class of a null object. (closes https://github.com/vim/vim/issues/12005) Handle error from calling a user function better.