patch 8.2.4138: Vim9: no error for return with argument when invalid Commit: https://github.com/vim/vim/commit/ef7aadbe36ad43a1b909f5f6c7e9b170ad62ef91 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Jan 18 18:46:07 2022 +0000 patch 8.2.4138: Vim9: no error for return with argument when invalid Problem: Vim9: no error for return with argument when the function does not return anything. Solution: Give an error for the invalid argument. (issue #9497)