error: lifetime may not live long enough --> $DIR/ex3-both-anon-regions-one-is-struct-3.rs:4:5 | LL | fn foo(mut y: Ref, x: &u32) { | ----- - let's call the lifetime of this reference `'1` | | | has type `Ref<'_, '2>` LL | y.b = x; | ^^^^^^^ assignment requires that `'1` must outlive `'2` error: aborting due to previous error