error[E0185]: method `bar` has a `&self` declaration in the impl, but not in the trait --> $DIR/staticness-mismatch.rs:7:5 | LL | fn bar(); | --------- trait method declared without `&self` ... LL | fn bar(&self) {} | ^^^^^^^^^^^^^ `&self` used in impl error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0185`.