Use `mrb_ensure_string_type` in `mrb_to_str`
MODIFY
src/object.c
src/object.c
@@ -584,11 +584,7 @@ mrb_Float(mrb_state *mrb, mrb_value val)
MRB_API mrb_value
mrb_to_str(mrb_state *mrb, mrb_value val)
{
- if (!mrb_string_p(val)) {
- mrb_value type = inspect_type(mrb, val);
- mrb_raisef(mrb, E_TYPE_ERROR, "can't convert %S to String", type);
- }
- return val;
+ return mrb_ensure_string_type(mrb, val);
}
/* obsolete: use mrb_ensure_string_type() instead */

Use `mrb_ensure_string_type` in `mrb_to_str`