| error: lifetime may not live long enough |
| --> $DIR/regions-bounded-method-type-parameters-trait-bound.rs:20:5 |
| | |
| LL | fn caller2<'a,'b,F:Foo<'a>>(a: Inv<'a>, b: Inv<'b>, f: F) { |
| | -- -- lifetime `'b` defined here |
| | | |
| | lifetime `'a` defined here |
| LL | // Here the value provided for 'y is 'b, and hence 'b:'a does not hold. |
| LL | f.method(b); |
| | ^^^^^^^^^^^ argument requires that `'b` must outlive `'a` |
| | |
| = help: consider adding the following bound: `'b: 'a` |
| = note: requirement occurs because of the type `Inv<'_>`, which makes the generic argument `'_` invariant |
| = note: the struct `Inv<'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 |
| |