error: lifetime may not live long enough
  --> $DIR/project-fn-ret-invariant.rs:59:5
   |
LL | fn transmute<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
   |              --  -- 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`
   = note: requirement occurs because of the type `Type<'_>`, which makes the generic argument `'_` invariant
   = note: the struct `Type<'a>` is invariant over the parameter `'a`
   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance

error: lifetime may not live long enough
  --> $DIR/project-fn-ret-invariant.rs:59:5
   |
LL | fn transmute<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
   |              --  -- 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`
   = note: requirement occurs because of the type `Type<'_>`, which makes the generic argument `'_` invariant
   = note: the struct `Type<'a>` is invariant over the parameter `'a`
   = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance

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

error: aborting due to 2 previous errors