mirror of https://github.com/rust-lang/rust
19 lines
845 B
Plaintext
19 lines
845 B
Plaintext
error: lifetime may not live long enough
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--> $DIR/regions-bounded-method-type-parameters-trait-bound.rs:20:5
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LL | fn caller2<'a,'b,F:Foo<'a>>(a: Inv<'a>, b: Inv<'b>, f: F) {
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| -- -- lifetime `'b` defined here
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| lifetime `'a` defined here
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LL | // Here the value provided for 'y is 'b, and hence 'b:'a does not hold.
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LL | f.method(b);
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| ^^^^^^^^^^^ argument requires that `'b` must outlive `'a`
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= help: consider adding the following bound: `'b: 'a`
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= note: requirement occurs because of the type `Inv<'_>`, which makes the generic argument `'_` invariant
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= note: the struct `Inv<'a>` is invariant over the parameter `'a`
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= help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
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error: aborting due to 1 previous error
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