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error: lifetime may not live long enough
--> $DIR/variance-cell-is-invariant.rs:14:12
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LL | fn use_<'short,'long>(c: Foo<'short>,
| ------ ----- lifetime `'long` defined here
| |
| lifetime `'short` defined here
...
LL | let _: Foo<'long> = c;
| ^^^^^^^^^^ type annotation requires that `'short` must outlive `'long`
|
= help: consider adding the following bound: `'short: 'long`
= note: requirement occurs because of the type `Foo<'_>`, which makes the generic argument `'_` invariant
= note: the struct `Foo<'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 previous error
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