mirror of https://github.com/rust-lang/rust
22 lines
729 B
Rust
22 lines
729 B
Rust
//@ revisions: stock with_negative_coherence
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//@[with_negative_coherence] known-bug: unknown
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// Ideally this would work, but we don't use `&'a T` to imply that `T: 'a`
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// which is required for `&'a T: !MyPredicate` to hold. This is similar to the
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// test `negative-coherence-placeholder-region-constraints-on-unification.explicit.stderr`
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#![feature(negative_impls)]
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#![cfg_attr(with_negative_coherence, feature(with_negative_coherence))]
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trait MyPredicate<'a> {}
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impl<'a, T> !MyPredicate<'a> for &'a T where T: 'a {}
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trait MyTrait<'a> {}
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impl<'a, T: MyPredicate<'a>> MyTrait<'a> for T {}
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impl<'a, T> MyTrait<'a> for &'a T {}
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//[stock]~^ ERROR: conflicting implementations of trait `MyTrait<'_>` for type `&_`
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fn main() {}
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