src/test/ui/nll/where_clauses_in_structs.stderr

   1 error: lifetime may not live long enough
   2   --> $DIR/where_clauses_in_structs.rs:11:11
   3    |
   4 LL | fn bar<'a, 'b>(x: Cell<&'a u32>, y: Cell<&'b u32>) {
   5    |        --  -- lifetime `'b` defined here
   6    |        |
   7    |        lifetime `'a` defined here
   8 LL |     Foo { x, y };
   9    |           ^ this usage requires that `'a` must outlive `'b`
  10    |
  11    = help: consider adding the following bound: `'a: 'b`
  12    = note: requirement occurs because of the type `Cell<&u32>`, which makes the generic argument `&u32` invariant
  13    = note: the struct `Cell<T>` is invariant over the parameter `T`
  14    = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
  15
  16 error: aborting due to previous error
  17