error: calling a slice of `as_bytes()` with `from_utf8` should be not necessary
  --> tests/ui/string_from_utf8_as_bytes.rs:4:13
   |
LL |     let _ = std::str::from_utf8(&"Hello World!".as_bytes()[6..11]);
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Some(&"Hello World!"[6..11])`
   |
   = note: `-D clippy::string-from-utf8-as-bytes` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::string_from_utf8_as_bytes)]`

error: aborting due to 1 previous error