error: lifetime may not live long enough
  --> $DIR/project-fn-ret-contravariant.rs:46:4
   |
LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
   |              -- -- lifetime `'b` defined here
   |              |
   |              lifetime `'a` defined here
...
LL |    (a, b)
   |    ^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
   |
   = help: consider adding the following bound: `'a: 'b`

error: lifetime may not live long enough
  --> $DIR/project-fn-ret-contravariant.rs:46:4
   |
LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
   |              -- -- lifetime `'b` defined here
   |              |
   |              lifetime `'a` defined here
...
LL |    (a, b)
   |    ^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
   |
   = help: consider adding the following bound: `'b: 'a`

help: `'a` and `'b` must be the same: replace one with the other

error: aborting due to 2 previous errors