| error: lifetime may not live long enough |
| --> $DIR/ex3-both-anon-regions.rs:2:5 |
| | |
| LL | fn foo(x: &mut Vec<&u8>, y: &u8) { |
| | - - let's call the lifetime of this reference `'1` |
| | | |
| | let's call the lifetime of this reference `'2` |
| LL | x.push(y); |
| | ^^^^^^^^^ argument requires that `'1` must outlive `'2` |
| | |
| = note: requirement occurs because of a mutable reference to `Vec<&u8>` |
| = 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<&'a u8>, y: &'a u8) { |
| | ++++ ++ ++ |
| |
| error: aborting due to 1 previous error |
| |
