patch 8.2.3720: Vim9: Internal error when invoking closure in legacy context Commit: https://github.com/vim/vim/commit/69c76171f1a78b829196f72d7010fbe1d9ad2944 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Dec 2 16:38:52 2021 +0000 patch 8.2.3720: Vim9: Internal error when invoking closure in legacy context Problem: Vim9: Internal error when invoking closure in legacy context. Solution: Give a more appropriate error message. (closes https://github.com/vim/vim/issues/9251)