error[E0308]: mismatched types
  --> $DIR/bad-type-in-vec-contains.rs:5:21
   |
LL |     primes.contains(3);
   |            -------- ^ expected `&_`, found integer
   |            |
   |            arguments to this method are incorrect
   |
   = note: expected reference `&_`
                   found type `{integer}`
note: method defined here
  --> $SRC_DIR/core/src/slice/mod.rs:LL:COL
help: consider borrowing here
   |
LL |     primes.contains(&3);
   |                     +

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.