error[E0407]: method `b` is not a member of trait `Foo` --> $DIR/E0407.rs:9:5 | LL | fn b() {} | ^^^-^^^^^ | | | | | help: there is an associated function with a similar name: `a` | not a member of trait `Foo` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0407`.