1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
error: lifetime may not live long enough
--> $DIR/ex2e-push-inference-variable-3.rs:6:33
|
LL | fn foo<'a, 'b, 'c>(x: &'a mut Vec<Ref<'b, i32>>, y: Ref<'c, i32>) {
| -- -- lifetime `'c` defined here
| |
| lifetime `'b` defined here
LL | let a: &mut Vec<Ref<i32>> = x;
| ^ assignment requires that `'c` must outlive `'b`
|
= help: consider adding the following bound: `'c: 'b`
= 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
error: aborting due to 1 previous error
|
