error[E0761]: file for module `mod_file_disambig_aux` found at both "$DIR/mod_file_disambig_aux.rs" and "$DIR/mod_file_disambig_aux/mod.rs" --> $DIR/mod_file_disambig.rs:1:1 | LL | mod mod_file_disambig_aux; | ^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: delete or rename one of them to remove the ambiguity error[E0433]: failed to resolve: use of undeclared crate or module `mod_file_aux` --> $DIR/mod_file_disambig.rs:4:16 | LL | assert_eq!(mod_file_aux::bar(), 10); | ^^^^^^^^^^^^ use of undeclared crate or module `mod_file_aux` error: aborting due to 2 previous errors Some errors have detailed explanations: E0433, E0761. For more information about an error, try `rustc --explain E0433`.