error[E0308]: mismatched types --> $DIR/non-whitespace-trimming.rs:4:241 | LL | ... () = (); let _: () = (); let _: () = (); let _: () = 42; let _: () = (); let _: () = (); let _: () = (); let _: () = (); let _: () = ... | -- ^^ expected `()`, found integer | | | expected due to this error: aborting due to previous error For more information about this error, try `rustc --explain E0308`.