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