patch 8.2.3822: leaking memory in map() and filter(), no string in Vim9
Problem: Leaking memory in map() and filter(), cannot use a string argument
in Vim9 script.
Solution: Fix the leak, adjust the argument check, also run the tests as
Vim9 script. (Yegappan Lakshmanan, closes #9354)
diff --git a/src/proto/typval.pro b/src/proto/typval.pro
index d13a1ec..675ad12 100644
--- a/src/proto/typval.pro
+++ b/src/proto/typval.pro
@@ -42,6 +42,7 @@
int check_for_list_or_blob_arg(typval_T *args, int idx);
int check_for_list_or_dict_arg(typval_T *args, int idx);
int check_for_list_or_dict_or_blob_arg(typval_T *args, int idx);
+int check_for_list_or_dict_or_blob_or_string_arg(typval_T *args, int idx);
int check_for_opt_buffer_or_dict_arg(typval_T *args, int idx);
char_u *tv_get_string(typval_T *varp);
char_u *tv_get_string_strict(typval_T *varp);