error[E0700]: hidden type for `impl Trait<'d, 'e>` captures lifetime that does not appear in bounds --> $DIR/ordinary-bounds-unrelated.rs:28:33 | LL | fn upper_bounds<'a, 'b, 'c, 'd, 'e>(a: Ordinary<'a>, b: Ordinary<'b>) -> impl Trait<'d, 'e> | ------------------ opaque type defined here ... LL | if condition() { a } else { b } | ^ | = note: hidden type `Ordinary<'_>` captures lifetime `'_` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0700`.