patch 8.2.1291: Vim9: type of varargs items is not checked
Problem: Vim9: type of varargs items is not checked.
Solution: Check the list item types. (closes #6523)
diff --git a/src/vim9execute.c b/src/vim9execute.c
index ab8142d..e52df61 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -755,9 +755,27 @@
argc -= vararg_count;
if (exe_newlist(vararg_count, &ectx) == FAIL)
goto failed_early;
+
+ // Check the type of the list items.
+ tv = STACK_TV_BOT(-1);
+ if (ufunc->uf_va_type != NULL
+ && ufunc->uf_va_type->tt_member != &t_any
+ && tv->vval.v_list != NULL)
+ {
+ type_T *expected = ufunc->uf_va_type->tt_member;
+ listitem_T *li = tv->vval.v_list->lv_first;
+
+ for (idx = 0; idx < vararg_count; ++idx)
+ {
+ if (check_typval_type(expected, &li->li_tv) == FAIL)
+ goto failed_early;
+ li = li->li_next;
+ }
+ }
+
if (defcount > 0)
// Move varargs list to below missing default arguments.
- *STACK_TV_BOT(defcount- 1) = *STACK_TV_BOT(-1);
+ *STACK_TV_BOT(defcount - 1) = *STACK_TV_BOT(-1);
--ectx.ec_stack.ga_len;
}