mod not_a_real_file; //~ ERROR file not found for module `not_a_real_file`
//~^ HELP to create the module `not_a_real_file`, create file

fn main() {
    assert_eq!(mod_file_aux::bar(), 10);
    //~^ ERROR failed to resolve: use of unresolved module or unlinked crate `mod_file_aux`
    //~| HELP you might be missing a crate named `mod_file_aux`
}