patch 8.2.2946: Vim9: substitute expression cannot be a List Commit: https://github.com/vim/vim/commit/2752360646545a9ae4853d2d5ca91cdb07c14eea Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jun 5 21:36:19 2021 +0200 patch 8.2.2946: Vim9: substitute expression cannot be a List Problem: Vim9: substitute expression cannot be a List in a :def function. Solution: Use typval2string(). (closes https://github.com/vim/vim/issues/8330)