error: local variable doesn't need to be boxed here
  --> $DIR/boxed_local.rs:1:6
   |
LL | fn f(x: Box<[u8; 500]>) {}
   |      ^
   |
   = note: `-D clippy::boxed-local` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::boxed_local)]`

error: aborting due to previous error