patch 8.2.2099: Vim9: some checks are not tested Commit: https://github.com/vim/vim/commit/918a4249176a8ccec3a34c9c7ef7bf4163676a63 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Dec 6 14:37:08 2020 +0100 patch 8.2.2099: Vim9: some checks are not tested Problem: Vim9: some checks are not tested. Solution: Add a few more tests. Give better error messages.

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