error: useless use of `vec!`
  --> $DIR/vec.rs:28:14
   |
LL |     on_slice(&vec![]);
   |              ^^^^^^^ help: you can use a slice directly: `&[]`
   |
   = note: `-D clippy::useless-vec` implied by `-D warnings`

error: useless use of `vec!`
  --> $DIR/vec.rs:30:18
   |
LL |     on_mut_slice(&mut vec![]);
   |                  ^^^^^^^^^^^ help: you can use a slice directly: `&mut []`

error: useless use of `vec!`
  --> $DIR/vec.rs:32:14
   |
LL |     on_slice(&vec![1, 2]);
   |              ^^^^^^^^^^^ help: you can use a slice directly: `&[1, 2]`

error: useless use of `vec!`
  --> $DIR/vec.rs:34:18
   |
LL |     on_mut_slice(&mut vec![1, 2]);
   |                  ^^^^^^^^^^^^^^^ help: you can use a slice directly: `&mut [1, 2]`

error: useless use of `vec!`
  --> $DIR/vec.rs:36:14
   |
LL |     on_slice(&vec![1, 2]);
   |              ^^^^^^^^^^^ help: you can use a slice directly: `&[1, 2]`

error: useless use of `vec!`
  --> $DIR/vec.rs:38:18
   |
LL |     on_mut_slice(&mut vec![1, 2]);
   |                  ^^^^^^^^^^^^^^^ help: you can use a slice directly: `&mut [1, 2]`

error: useless use of `vec!`
  --> $DIR/vec.rs:40:14
   |
LL |     on_slice(&vec!(1, 2));
   |              ^^^^^^^^^^^ help: you can use a slice directly: `&[1, 2]`

error: useless use of `vec!`
  --> $DIR/vec.rs:42:18
   |
LL |     on_mut_slice(&mut vec![1, 2]);
   |                  ^^^^^^^^^^^^^^^ help: you can use a slice directly: `&mut [1, 2]`

error: useless use of `vec!`
  --> $DIR/vec.rs:44:14
   |
LL |     on_slice(&vec![1; 2]);
   |              ^^^^^^^^^^^ help: you can use a slice directly: `&[1; 2]`

error: useless use of `vec!`
  --> $DIR/vec.rs:46:18
   |
LL |     on_mut_slice(&mut vec![1; 2]);
   |                  ^^^^^^^^^^^^^^^ help: you can use a slice directly: `&mut [1; 2]`

error: useless use of `vec!`
  --> $DIR/vec.rs:63:14
   |
LL |     for a in vec![1, 2, 3] {
   |              ^^^^^^^^^^^^^ help: you can use a slice directly: `&[1, 2, 3]`

error: aborting due to 11 previous errors