mirror of https://github.com/rust-lang/rust
25 lines
463 B
Rust
25 lines
463 B
Rust
// Test that we are NOT able to establish that `<T as
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// MyTrait<'a>>::Output: 'a` outlives `'a` here -- we have only one
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// recourse, which is to prove that `T: 'a` and `'a: 'a`, but we don't
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// know that `T: 'a`.
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trait MyTrait<'a> {
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type Output;
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}
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fn foo<'a, T>() -> &'a ()
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where
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T: MyTrait<'a>,
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{
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bar::<T::Output>() //~ ERROR the parameter type `T` may not live long enough
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}
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fn bar<'a, T>() -> &'a ()
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where
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T: 'a,
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{
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&()
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}
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fn main() {}
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