1 error[E0308]: mismatched types
2 --> $DIR/whitespace-trimming.rs:4:193
4 LL | ... let _: () = 42;
5 | ^^ expected (), found integer
7 = note: expected unit type `()`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.