#![warn(clippy::module_inception)] pub mod foo2 { pub mod bar2 { pub mod bar2 { //~^ ERROR: module has the same name as its containing module //~| NOTE: `-D clippy::module-inception` implied by `-D warnings` pub mod foo2 {} } pub mod foo2 {} } pub mod foo2 { //~^ ERROR: module has the same name as its containing module pub mod bar2 {} } } mod foo { mod bar { mod bar { //~^ ERROR: module has the same name as its containing module mod foo {} } mod foo {} } mod foo { //~^ ERROR: module has the same name as its containing module mod bar {} } } // No warning. See . mod bar { #[allow(clippy::module_inception)] mod bar {} } fn main() {}