error[E0053]: method `early` has an incompatible type for trait --> $DIR/method-signature-matches.rs:57:27 | LL | fn early<'late, T>(_: &'late ()) {} | - ^^^^^^^^^ | | | | | expected type parameter `T`, found `()` | | help: change the parameter type to match the trait: `&T` | this type parameter | note: type in trait --> $DIR/method-signature-matches.rs:52:28 | LL | fn early<'early, T>(x: &'early T) -> impl Sized; | ^^^^^^^^^ = note: expected signature `fn(&T)` found signature `fn(&'late ())` error: aborting due to previous error For more information about this error, try `rustc --explain E0053`.