patch 8.2.2846: Vim9: "echo Func()" does not give an error for using void Commit: https://github.com/vim/vim/commit/68db996b621b98066fb7ab7028ed5c6aaa3954a8 Author: Bram Moolenaar <Bram@vim.org> Date: Sun May 9 23:19:22 2021 +0200 patch 8.2.2846: Vim9: "echo Func()" does not give an error for using void Problem: Vim9: "echo Func()" does not give an error for a function without a return value. Solution: Give an error. Be more specific about why a value is invalid.

/* locale.c */
char_u *get_mess_lang(void);
void set_lang_var(void);
void init_locale(void);
void ex_language(exarg_T *eap);
void free_locales(void);
char_u *get_lang_arg(expand_T *xp, int idx);
char_u *get_locales(expand_T *xp, int idx);
/* vim: set ft=c : */