error: casting to the same type is unnecessary (`u32` -> `u32`)
  --> tests/ui/track-diagnostics-clippy.rs:LL:CC
   |
LL |     let b = a as u32;
   |             ^^^^^^^^ help: try: `a`
   |
   = note: -Ztrack-diagnostics: created at clippy_lints/src/casts/unnecessary_cast.rs:LL:CC
   = note: `-D clippy::unnecessary-cast` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::unnecessary_cast)]`

error: returning the result of a `let` binding from a block
  --> tests/ui/track-diagnostics-clippy.rs:LL:CC
   |
LL |         let d = 42;
   |         ----------- unnecessary `let` binding
LL |         d
   |         ^
   |
   = note: -Ztrack-diagnostics: created at clippy_lints/src/returns/let_and_return.rs:LL:CC
   = note: `-D clippy::let-and-return` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::let_and_return)]`
help: return the expression directly
   |
LL ~         
LL ~         42
   |

error: aborting due to 2 previous errors