error[E0700]: hidden type for `Opaque(DefId(0:11 ~ impl_trait_captures[aeb9]::foo::{opaque#0}), ['a/#0, T, 'a/#0])` captures lifetime that does not appear in bounds
  --> $DIR/impl-trait-captures.rs:11:5
   |
LL | fn foo<'a, T>(x: &T) -> impl Foo<'a> {
   |                  --     ------------ opaque type defined here
   |                  |
   |                  hidden type `&ReLateParam(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::'_), '_)) T` captures the anonymous lifetime defined here
LL |     x
   |     ^
   |
help: add a `use<...>` bound to explicitly capture `ReLateParam(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::'_), '_))`
   |
LL | fn foo<'a, T>(x: &T) -> impl Foo<'a> + use<'a, ReLateParam(DefId(0:8 ~ impl_trait_captures[aeb9]::foo), BrNamed(DefId(0:13 ~ impl_trait_captures[aeb9]::foo::'_), '_)), T> {
   |                                      +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0700`.