error[E0425]: cannot find function `foo` in this scope --> $DIR/issue-4366.rs:18:29 | LL | fn sub() -> isize { foo(); 1 } | ^^^ not found in this scope | help: consider importing this function | LL + use foo::foo; | error: aborting due to previous error For more information about this error, try `rustc --explain E0425`.