warning: not reporting region error due to nll
  --> $DIR/mir_check_cast_unsize.rs:19:5
   |
LL |     x
   |     ^

error: unsatisfied lifetime constraints
  --> $DIR/mir_check_cast_unsize.rs:17:46
   |
LL |   fn bar<'a>(x: &'a u32) -> &'static dyn Debug {
   |  ________--____________________________________^
   | |        |
   | |        lifetime `'a` defined here
LL | |     //~^ ERROR unsatisfied lifetime constraints
LL | |     x
LL | |     //~^ WARNING not reporting region error due to nll
LL | | }
   | |_^ return requires that `'a` must outlive `'static`

error: aborting due to previous error