patch 8.2.1374: Vim9: error for assigning empty list to script variable
Problem: Vim9: error for assigning empty list to script variable.
Solution: Use t_unknown for empty list member. (closes #6595)
diff --git a/src/vim9compile.c b/src/vim9compile.c
index dc10b48..e87634b 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -502,22 +502,25 @@
if (tv->v_type == VAR_STRING)
return &t_string;
- if (tv->v_type == VAR_LIST
- && tv->vval.v_list != NULL
- && tv->vval.v_list->lv_first != NULL)
+ if (tv->v_type == VAR_LIST)
{
+ if (tv->vval.v_list == NULL || tv->vval.v_list->lv_first == NULL)
+ return &t_list_empty;
+
// Use the type of the first member, it is the most specific.
member_type = typval2type(&tv->vval.v_list->lv_first->li_tv, type_gap);
return get_list_type(member_type, type_gap);
}
- if (tv->v_type == VAR_DICT
- && tv->vval.v_dict != NULL
- && tv->vval.v_dict->dv_hashtab.ht_used > 0)
+ if (tv->v_type == VAR_DICT)
{
dict_iterator_T iter;
typval_T *value;
+ if (tv->vval.v_dict == NULL
+ || tv->vval.v_dict->dv_hashtab.ht_used == 0)
+ return &t_dict_empty;
+
// Use the type of the first value, it is the most specific.
dict_iterate_start(tv, &iter);
dict_iterate_next(&iter, &value);