32 lines
629 B
Rust
32 lines
629 B
Rust
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// check-pass
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// known-bug: #100051
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// Should fail. Implied bounds from projections in impl headers can create
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// improper lifetimes. Variant of issue #98543 which was fixed by #99217.
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trait Trait {
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type Type;
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}
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impl<T> Trait for T {
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type Type = ();
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}
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trait Extend<'a, 'b> {
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fn extend(self, s: &'a str) -> &'b str;
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}
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impl<'a, 'b> Extend<'a, 'b> for <&'b &'a () as Trait>::Type
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where
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for<'what, 'ever> &'what &'ever (): Trait,
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{
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fn extend(self, s: &'a str) -> &'b str {
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s
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}
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}
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fn main() {
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let y = <() as Extend<'_, '_>>::extend((), &String::from("Hello World"));
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println!("{}", y);
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}
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