src/test/ui/lifetimes/lifetime-errors/ex3-both-anon-regions-both-are-structs-earlybound-regions.nll.stderr

   1 error: lifetime may not live long enough
   2   --> $DIR/ex3-both-anon-regions-both-are-structs-earlybound-regions.rs:9:5
   3    |
   4 LL | fn foo<'a, 'b>(mut x: Vec<Ref<'a>>, y: Ref<'b>)
   5    |        --  -- lifetime `'b` defined here
   6    |        |
   7    |        lifetime `'a` defined here
   8 ...
   9 LL |     x.push(y);
  10    |     ^^^^^^^^^ argument requires that `'b` must outlive `'a`
  11    |
  12    = help: consider adding the following bound: `'b: 'a`
  13
  14 error: aborting due to previous error
  15