error[E0583]: file not found for module `lib` --> $DIR/special_module_name.rs:1:1 | LL | mod lib; | ^^^^^^^^ | = help: to create the module `lib`, create file "$DIR/lib.rs" or "$DIR/lib/mod.rs" error[E0583]: file not found for module `main` --> $DIR/special_module_name.rs:4:1 | LL | mod main; | ^^^^^^^^^ | = help: to create the module `main`, create file "$DIR/main.rs" or "$DIR/main/mod.rs" warning: found module declaration for lib.rs --> $DIR/special_module_name.rs:1:1 | LL | mod lib; | ^^^^^^^^ | = note: lib.rs is the root of this crate's library target = help: to refer to it from other targets, use the library's name as the path = note: `#[warn(special_module_name)]` on by default warning: found module declaration for main.rs --> $DIR/special_module_name.rs:4:1 | LL | mod main; | ^^^^^^^^^ | = note: a binary crate cannot be used as library error: aborting due to 2 previous errors; 2 warnings emitted For more information about this error, try `rustc --explain E0583`.