mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-18 03:25:55 +00:00
19 lines
769 B
Plaintext
19 lines
769 B
Plaintext
error: lifetime may not live long enough
|
|
--> $DIR/match-ref-mut-let-invariance.rs:11:9
|
|
|
|
|
LL | impl<'b> S<'b> {
|
|
| -- lifetime `'b` defined here
|
|
LL | fn bar<'a>(&'a mut self) -> &'a mut &'a i32 {
|
|
| -- lifetime `'a` defined here
|
|
LL | let ref mut x = self.0;
|
|
LL | x
|
|
| ^ method was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
|
|
|
|
|
= help: consider adding the following bound: `'a: 'b`
|
|
= note: requirement occurs because of a mutable reference to `&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
|
|
|