30 lines
789 B
Rust
30 lines
789 B
Rust
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// Repro for <https://github.com/rust-lang/rust/issues/124757#issue-2279603232>.
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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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use std::collections::HashSet;
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use std::future::Future;
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trait MyTrait {
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fn blah(&self, x: impl Iterator<Item = u32>) -> impl Future<Output = ()> + Send;
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}
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fn foo<T: MyTrait + Send + Sync>(
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val: T,
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unique_x: HashSet<u32>,
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) -> impl Future<Output = ()> + Send {
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let cached = HashSet::new();
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async move {
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let xs = unique_x.union(&cached)
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// .copied() // works
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.map(|x| *x) // error
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;
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let blah = val.blah(xs.into_iter()).await;
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}
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}
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fn main() {}
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