1 error[E0072]: recursive type `Expr` has infinite size
2 --> $DIR/issue-32326.rs:5:1
5 | ^^^^^^^^^ recursive type has infinite size
7 | ---- ---- recursive without indirection
9 | recursive without indirection
11 help: insert some indirection (e.g., a `Box`, `Rc`, or `&`) to make `Expr` representable
13 LL | Plus(Box<Expr>, Box<Expr>),
16 error: aborting due to previous error
18 For more information about this error, try `rustc --explain E0072`.