error[E0599]: no method named `foo` found for fn item `fn(u8, i32) -> Foo {Foo}` in the current scope
  --> $DIR/tuple-method.rs:12:15
   |
LL |     thing.bar.foo();
   |     --------- ^^^ method not found in `fn(u8, i32) -> Foo {Foo}`
   |     |
   |     this is the constructor of a struct
   |
help: call the constructor
   |
LL |     (thing.bar)(_, _).foo();
   |     +         +++++++

error: aborting due to previous error

For more information about this error, try `rustc --explain E0599`.