| error: lifetime may not live long enough |
| --> $DIR/regions-infer-invariance-due-to-mutability-4.rs:10:5 |
| | |
| LL | fn to_longer_lifetime<'r>(b_isize: Invariant<'r>) -> Invariant<'static> { |
| | -- lifetime `'r` defined here |
| LL | b_isize |
| | ^^^^^^^ returning this value requires that `'r` must outlive `'static` |
| | |
| = 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 |
| |
