mirror of https://github.com/rust-lang/rust
28 lines
600 B
Rust
28 lines
600 B
Rust
#![allow(dead_code)]
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// Test that even when `Self` is only used in covariant position, it
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// is treated as invariant.
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trait Get {
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fn get() -> Self;
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}
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fn get_min_from_max<'min, 'max, G>()
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where 'max : 'min, G : 'max, &'max G : Get
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{
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// Previously OK, now an error as traits are invariant.
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impls_get::<&'min G>();
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//~^ ERROR lifetime may not live long enough
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}
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fn get_max_from_min<'min, 'max, G>()
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where 'max : 'min, G : 'max, &'min G : Get
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{
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impls_get::<&'max G>();
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//~^ ERROR lifetime may not live long enough
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}
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fn impls_get<G>() where G : Get { }
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fn main() { }
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