error: useless use of `vec!`
  --> tests/ui-toml/useless_vec/useless_vec.rs:8:9
   |
LL |     foo(&vec![1_u32]);
   |         ^^^^^^^^^^^^ help: you can use a slice directly: `&[1_u32]`
   |
   = note: `-D clippy::useless-vec` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::useless_vec)]`

error: aborting due to 1 previous error