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22 lines
482 B
Rust
22 lines
482 B
Rust
#![feature(rustc_attrs)]
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#![rustc_variance_of_opaques]
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trait Bar<'a> {
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type Assoc: From<()>;
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}
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fn foo<'a, T: Bar<'a>>() -> impl Into<T::Assoc> {
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//~^ ERROR [o, o]
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// captures both T and 'a invariantly
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()
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}
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fn foo2<'a, T: Bar<'a>>() -> impl Into<T::Assoc> + 'a {
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//~^ ERROR [o, o, o]
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// captures both T and 'a invariantly, and also duplicates `'a`
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// i.e. the opaque looks like `impl Into<<T as Bar<'a>>::Assoc> + 'a_duplicated`
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()
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}
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fn main() {}
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