31 lines
851 B
Rust
31 lines
851 B
Rust
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// Repro for <https://github.com/rust-lang/rust/issues/114177#issue-1826550174>.
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//@ edition: 2021
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//@ revisions: assumptions no_assumptions
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//@[assumptions] compile-flags: -Zhigher-ranked-assumptions
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//@[assumptions] check-pass
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//@[no_assumptions] known-bug: #110338
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// Using `impl Future` instead of `async to ensure that the Future is Send.
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//
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// In the original code `a` would be `&[T]`. For more minimization I've removed the reference.
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fn foo(a: [(); 0]) -> impl std::future::Future<Output = ()> + Send {
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async move {
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let iter = Adaptor::new(a.iter().map(|_: &()| {}));
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std::future::pending::<()>().await;
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drop(iter);
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}
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}
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struct Adaptor<T: Iterator> {
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iter: T,
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v: T::Item,
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}
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impl<T: Iterator> Adaptor<T> {
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pub fn new(_: T) -> Self {
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Self { iter: todo!(), v: todo!() }
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}
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}
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fn main() {}
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