src/test/ui/issues/issue-17431-1.stderr

   1 error[E0072]: recursive type `Foo` has infinite size
   2   --> $DIR/issue-17431-1.rs:11:1
   3    |
   4 LL | struct Foo { foo: Option<Option<Foo>> }
   5    | ^^^^^^^^^^   ------------------------ recursive without indirection
   6    | |
   7    | recursive type has infinite size
   8    |
   9    = help: insert indirection (e.g., a `Box`, `Rc`, or `&`) at some point to make `Foo` representable
  10
  11 error: aborting due to previous error
  12
  13 For more information about this error, try `rustc --explain E0072`.