| error: lifetime may not live long enough |
| --> $DIR/ex3-both-anon-regions-2.rs:1:14 |
| | |
| LL | fn foo(&mut (ref mut v, w): &mut (&u8, &u8), x: &u8) { |
| | ^^^^^^^^^ - - let's call the lifetime of this reference `'1` |
| | | | |
| | | let's call the lifetime of this reference `'2` |
| | assignment requires that `'1` must outlive `'2` |
| | |
| = note: requirement occurs because of a mutable reference to `&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>(&mut (ref mut v, w): &mut (&'a u8, &u8), x: &'a u8) { |
| | ++++ ++ ++ |
| |
| error: aborting due to 1 previous error |
| |
