mirror of https://github.com/rust-lang/rust
39 lines
959 B
Rust
39 lines
959 B
Rust
// Regression test for issue 123053, where associated types with lifetimes caused generation of the
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// trait object type to fail, causing an ICE.
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//
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//@ needs-sanitizer-cfi
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//@ compile-flags: -Ccodegen-units=1 -Clto -Ctarget-feature=-crt-static -Zsanitizer=cfi --edition=2021
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//@ no-prefer-dynamic
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//@ only-x86_64-unknown-linux-gnu
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//@ build-pass
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trait Iterable {
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type Item<'a>
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where
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Self: 'a;
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type Iter<'a>: Iterator<Item = Self::Item<'a>>
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where
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Self: 'a;
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fn iter<'a>(&'a self) -> Self::Iter<'a>;
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}
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impl<T> Iterable for [T] {
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type Item<'a> = <std::slice::Iter<'a, T> as Iterator>::Item where T: 'a;
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type Iter<'a> = std::slice::Iter<'a, T> where T: 'a;
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fn iter<'a>(&'a self) -> Self::Iter<'a> {
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self.iter()
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}
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}
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fn get_first<'a, I: Iterable + ?Sized>(it: &'a I) -> Option<I::Item<'a>> {
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it.iter().next()
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}
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fn main() {
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let v = vec![1, 2, 3];
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assert_eq!(Some(&1), get_first(&*v));
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}
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