error[E0495]: cannot infer an appropriate lifetime for lifetime parameter `'d` due to conflicting requirements --> $DIR/normalization-bounds-error.rs:12:31 | LL | fn visit_seq<'d, 'a: 'd>() -> <&'a () as Visitor<'d>>::Value {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | note: first, the lifetime cannot outlive the lifetime `'d` as defined here... --> $DIR/normalization-bounds-error.rs:12:14 | LL | fn visit_seq<'d, 'a: 'd>() -> <&'a () as Visitor<'d>>::Value {} | ^^ note: ...but the lifetime must also be valid for the lifetime `'a` as defined here... --> $DIR/normalization-bounds-error.rs:12:18 | LL | fn visit_seq<'d, 'a: 'd>() -> <&'a () as Visitor<'d>>::Value {} | ^^ note: ...so that the types are compatible --> $DIR/normalization-bounds-error.rs:12:31 | LL | fn visit_seq<'d, 'a: 'd>() -> <&'a () as Visitor<'d>>::Value {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ = note: expected `Visitor<'d>` found `Visitor<'_>` error: aborting due to previous error For more information about this error, try `rustc --explain E0495`.