mirror of https://github.com/rust-lang/rust
19 lines
814 B
Plaintext
19 lines
814 B
Plaintext
error: lifetime may not live long enough
|
|
--> $DIR/regions-variance-invariant-use-contravariant.rs:20:12
|
|
|
|
|
LL | fn use_<'short,'long>(c: Invariant<'long>,
|
|
| ------ ----- lifetime `'long` defined here
|
|
| |
|
|
| lifetime `'short` defined here
|
|
...
|
|
LL | let _: Invariant<'short> = c;
|
|
| ^^^^^^^^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
|
|
|
|
|
= help: consider adding the following bound: `'short: 'long`
|
|
= note: requirement occurs because of the type `Invariant<'_>`, which makes the generic argument `'_` invariant
|
|
= note: the struct `Invariant<'a>` is invariant over the parameter `'a`
|
|
= help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
|
|
|
|
error: aborting due to 1 previous error
|
|
|