patch 8.2.1428: Vim9: :def function does not abort on nested function error Commit: https://github.com/vim/vim/commit/ed677f5587af366f185f8922b7dde4a98c884328 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Aug 12 16:38:10 2020 +0200 patch 8.2.1428: Vim9: :def function does not abort on nested function error Problem: Vim9: :def function does not abort on nested function error. Solution: Check whether an error message was given. (closes https://github.com/vim/vim/issues/6691)