| error: lifetime may not live long enough |
| --> $DIR/ex2b-push-no-existing-names.rs:6:5 |
| | |
| LL | fn foo(x: &mut Vec<Ref<i32>>, y: Ref<i32>) { |
| | - - has type `Ref<'1, i32>` |
| | | |
| | has type `&mut Vec<Ref<'2, i32>>` |
| LL | x.push(y); |
| | ^^^^^^^^^ argument requires that `'1` must outlive `'2` |
| | |
| = note: requirement occurs because of a mutable reference to `Vec<Ref<'_, i32>>` |
| = note: mutable references are invariant over their type parameter |
| = help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance |
| help: consider introducing a named lifetime parameter |
| | |
| LL | fn foo<'a>(x: &mut Vec<Ref<'a, i32>>, y: Ref<'a, i32>) { |
| | ++++ +++ +++ |
| |
| error: aborting due to 1 previous error |
| |
