error: {foo<'{erased}>::{closure#0} closure_kind_ty=i8 closure_sig_as_fn_ptr_ty=extern "rust-call" fn(()) upvar_tys=()}
  --> $DIR/erased-regions-in-hidden-ty.rs:12:36
   |
LL | fn foo<'a: 'a>(x: &'a Vec<i32>) -> impl Fn() + 'static {
   |                                    ^^^^^^^^^^^^^^^^^^^

error: Opaque(DefId(..), ['{erased}])
  --> $DIR/erased-regions-in-hidden-ty.rs:18:13
   |
LL | fn bar() -> impl Fn() + 'static {
   |             ^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors