original.name="Template_Invalid_25"
======
>>> main.whiley
type LinkedList<T> is null | { LinkedList next, T data }
type BinaryTree<T> is null | { BinaryTree<T> left, BinaryTree<T,T> right, T data }

---
E409 main.whiley 1,31:40
E410 main.whiley 2,51:60