39 lines
599 B
Rust
39 lines
599 B
Rust
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// edition: 2021
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// build-fail
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//~^^ ERROR overflow evaluating the requirement `<A as Second>::{opaque#0} == _`
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#![feature(async_fn_in_trait)]
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fn main() {
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let _ = async {
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A.first().await.second().await;
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};
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}
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pub trait First {
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type Second: Second;
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async fn first(self) -> Self::Second;
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}
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struct A;
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impl First for A {
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type Second = A;
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async fn first(self) -> Self::Second {
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A
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}
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}
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pub trait Second {
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async fn second(self);
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}
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impl<C> Second for C
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where
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C: First,
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{
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async fn second(self) {
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self.first().await.second().await;
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}
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}
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