error[E0433]: failed to resolve: use of undeclared crate or module `foo` --> $DIR/bad-module.rs:5:15 | LL | let foo = foo::bar::baz(); | ^^^ use of undeclared crate or module `foo` error[E0433]: failed to resolve: use of undeclared crate or module `thing` --> $DIR/bad-module.rs:2:15 | LL | let foo = thing::len(Vec::new()); | ^^^^^ use of undeclared crate or module `thing` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0433`.