error[E0072]: recursive type `ObjectType` has infinite size
  --> $DIR/issue-57271.rs:7:1
   |
LL | pub enum ObjectType {
   | ^^^^^^^^^^^^^^^^^^^ recursive type has infinite size
LL |     Class(ClassTypeSignature),
LL |     Array(TypeSignature),
   |           ------------- recursive without indirection
   |
   = help: insert indirection (e.g., a `Box`, `Rc`, or `&`) at some point to make `ObjectType` representable

error[E0072]: recursive type `TypeSignature` has infinite size
  --> $DIR/issue-57271.rs:19:1
   |
LL | pub enum TypeSignature {
   | ^^^^^^^^^^^^^^^^^^^^^^ recursive type has infinite size
LL |     Base(BaseType),
LL |     Object(ObjectType),
   |            ---------- recursive without indirection
   |
   = help: insert indirection (e.g., a `Box`, `Rc`, or `&`) at some point to make `TypeSignature` representable

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0072`.