mruby-errno/errno.c (mrb_errno_list): no need to check array type here.
@@ -169,7 +169,6 @@ mrb_errno_list(mrb_state *mrb, mrb_value self)
mrb_value list;
mrb_get_args(mrb, "A", &list);
- mrb_ensure_array_type(mrb, list);
mrb_ary_modify(mrb, mrb_ary_ptr(list));
mrb_ssize head = RARRAY_LEN(list);
