error[E0433]: failed to resolve: use of undeclared type `NonExistingMap` --> $DIR/E0433.rs:2:15 | LL | let map = NonExistingMap::new(); | ^^^^^^^^^^^^^^ use of undeclared type `NonExistingMap` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0433`.