1 error[E0608]: cannot index into a value of type `()`
2 --> $DIR/index_message.rs:13:13
4 LL | let _ = z[0]; //~ ERROR cannot index into a value of type `()`
5 | ^^^^ help: to access tuple elements, use: `z.0`
7 error: aborting due to previous error
9 For more information about this error, try `rustc --explain E0608`.