error[E0433]: failed to resolve: use of undeclared crate or module `a` --> $DIR/macro-inner-attributes.rs:17:5 | LL | a::bar(); | ^ use of undeclared crate or module `a` | help: there is a crate or module with a similar name | LL | b::bar(); | ~ error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0433`.