29 lines
674 B
Rust
29 lines
674 B
Rust
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// This test should never pass!
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#![feature(type_alias_impl_trait)]
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trait Captures<'a> {}
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impl<T> Captures<'_> for T {}
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struct MyTy<'a, 'b>(Option<*mut &'a &'b ()>);
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unsafe impl Send for MyTy<'_, 'static> {}
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fn step1<'a, 'b: 'a>() -> impl Sized + Captures<'b> + 'a {
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MyTy::<'a, 'b>(None)
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}
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mod tait {
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type Tait<'a> = impl Sized + 'a;
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pub(super) fn step2<'a, 'b: 'a>() -> Tait<'a> {
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super::step1::<'a, 'b>()
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//~^ ERROR hidden type for `Tait<'a>` captures lifetime that does not appear in bounds
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}
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}
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fn step3<'a, 'b: 'a>() -> impl Send + 'a {
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tait::step2::<'a, 'b>()
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// This should not be Send unless `'b: 'static`
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}
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fn main() {}
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