| 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 |
| |
