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error: lifetime may not live long enough
--> $DIR/project-fn-ret-invariant.rs:40:13
|
LL | fn baz<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
| -- -- lifetime `'b` defined here
| |
| lifetime `'a` defined here
LL | let f = foo; // <-- No consistent type can be inferred for `f` here.
LL | let a = bar(f, x);
| ^^^^^^^^^ argument requires that `'a` must outlive `'b`
|
= help: consider adding the following bound: `'a: 'b`
= note: requirement occurs because of the type `Type<'_>`, which makes the generic argument `'_` invariant
= note: the struct `Type<'a>` is invariant over the parameter `'a`
= help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
error: lifetime may not live long enough
--> $DIR/project-fn-ret-invariant.rs:40:13
|
LL | fn baz<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
| -- -- lifetime `'b` defined here
| |
| lifetime `'a` defined here
LL | let f = foo; // <-- No consistent type can be inferred for `f` here.
LL | let a = bar(f, x);
| ^^^^^^^^^ argument requires that `'b` must outlive `'a`
|
= help: consider adding the following bound: `'b: 'a`
= note: requirement occurs because of a function pointer to `foo`
= note: the function `foo` is invariant over the parameter `'a`
= help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
help: `'a` and `'b` must be the same: replace one with the other
error: aborting due to 2 previous errors
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