src/test/ui/nll/issue-95272.stderr

   1 error: lifetime may not live long enough
   2   --> $DIR/issue-95272.rs:10:13
   3    |
   4 LL | fn test<'a, 'b>(x: Cell<&'a ()>, y: Cell<&'b ()>) {
   5    |         --  -- lifetime `'b` defined here
   6    |         |
   7    |         lifetime `'a` defined here
   8 LL |     let f = check;
   9    |             ^^^^^ assignment requires that `'a` must outlive `'b`
  10    |
  11    = help: consider adding the following bound: `'a: 'b`
  12    = note: requirement occurs because of a function pointer to `check`
  13    = note: the function `check` is invariant over the parameter `'a`
  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