error[E0308]: mismatched types
 --> tests/compile-fail/span-tracked-getter.rs:9:13
  |
9 |     x.field(22);
  |       ----- ^^ expected `&_`, found integer
  |       |
  |       arguments to this method are incorrect
  |
  = note: expected reference `&_`
                  found type `{integer}`
note: method defined here
 --> tests/compile-fail/span-tracked-getter.rs:3:5
  |
1 | #[salsa::tracked]
  | -----------------
2 | pub struct MyTracked<'db> {
3 |     field: u32,
  |     ^^^^^
help: consider borrowing here
  |
9 |     x.field(&22);
  |             +

warning: variable does not need to be mutable
  --> tests/compile-fail/span-tracked-getter.rs:13:9
   |
13 |     let mut db = salsa::default_database();
   |         ----^^
   |         |
   |         help: remove this `mut`
   |
   = note: `#[warn(unused_mut)]` on by default