error: using `as _` conversion
  --> tests/ui/as_underscore.rs:7:9
   |
LL |     foo(n as _);
   |         ^^^^^-
   |              |
   |              help: consider giving the type explicitly: `usize`
   |
   = note: `-D clippy::as-underscore` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::as_underscore)]`

error: using `as _` conversion
  --> tests/ui/as_underscore.rs:10:18
   |
LL |     let _n: u8 = n as _;
   |                  ^^^^^-
   |                       |
   |                       help: consider giving the type explicitly: `u8`

error: aborting due to 2 previous errors