error: module has the same name as its containing module
  --> $DIR/module_inception.rs:17:9
   |
17 | /         mod bar {
18 | |             mod foo {}
19 | |         }
   | |_________^
   |
   = note: `-D clippy::module-inception` implied by `-D warnings`

error: module has the same name as its containing module
  --> $DIR/module_inception.rs:22:5
   |
22 | /     mod foo {
23 | |         mod bar {}
24 | |     }
   | |_____^

error: aborting due to 2 previous errors