1 error: unsatisfied lifetime constraints
2 --> $DIR/ex3-both-anon-regions-both-are-structs-3.rs:16:5
4 LL | fn foo(mut x: Ref) {
7 | has type `Ref<'_, '1>`
8 | has type `Ref<'2, '_>`
9 LL | x.a = x.b; //~ ERROR lifetime mismatch
10 | ^^^^^^^^^ assignment requires that `'1` must outlive `'2`
12 error: aborting due to previous error