error: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. Consider changing the type to `&[...]`
 --> ptr_arg.rs:6:14
  |
6 | fn do_vec(x: &Vec<i64>) {
  |              ^^^^^^^^^
  |
  = note: `-D ptr-arg` implied by `-D warnings`

error: writing `&String` instead of `&str` involves a new object where a slice will do. Consider changing the type to `&str`
  --> ptr_arg.rs:14:14
   |
14 | fn do_str(x: &String) {
   |              ^^^^^^^
   |
   = note: `-D ptr-arg` implied by `-D warnings`

error: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. Consider changing the type to `&[...]`
  --> ptr_arg.rs:27:18
   |
27 |     fn do_vec(x: &Vec<i64>);
   |                  ^^^^^^^^^
   |
   = note: `-D ptr-arg` implied by `-D warnings`

error: aborting due to previous error(s)


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