commit da479c7597a61c4d50c842df21c9294bd9bf1037
author Bram Moolenaar <Bram@vim.org> Sat Apr 10 21:01:38 2021 +0200
committer Bram Moolenaar <Bram@vim.org> Sat Apr 10 21:01:38 2021 +0200
tree 44a5cbf9c031551b9fcd79f69c727d2d7566f912
parent fe95b94ffa75c4925ad16c43f94092f2b1d35fc6

patch 8.2.2750: Vim9: error for using underscore in nested function

Problem:    Vim9: error for using underscore in nested function.
Solution:   Do not consider "_" already defined. (closes #8096)

src/vim9compile.c

diff --git a/src/vim9compile.c b/src/vim9compile.c
index b005ff2..02c75c4 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -422,6 +422,10 @@
     int		c = p[len];
     ufunc_T	*ufunc = NULL;
 
+    // underscore argument is OK
+    if (len == 1 && *p == '_')
+	return OK;
+
     if (script_var_exists(p, len, cctx) == OK)
     {
 	if (is_arg)