error[E0582]: binding for associated type `Output` references lifetime `'a`, which does not appear in the trait input types --> $DIR/bound-lifetime-constrained.rs:38:63 | LL | fn clause1() where T: for<'a> Fn(<() as Foo<'a>>::Item) -> &'a i32 { | ^^^^^^^ error[E0582]: binding for associated type `Output` references lifetime `'a`, which does not appear in the trait input types --> $DIR/bound-lifetime-constrained.rs:43:42 | LL | fn clause2() where T: for<'a> Fn() -> <() as Foo<'a>>::Item { | ^^^^^^^^^^^^^^^^^^^^^ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0582`.