error[E0609]: no field `1` on type `Foo`
  --> $DIR/ex-E0612.rs:15:6
   |
LL |    y.1; //~ ERROR no field `1` on type `Foo`
   |      ^ did you mean `0`?

error: aborting due to previous error

For more information about this error, try `rustc --explain E0609`.