45 lines
842 B
Rust
45 lines
842 B
Rust
// Regression test for #135470.
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// Verify that we don't ICE when building vtable entries
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// for a blanket impl involving async and impossible predicates.
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//@ check-pass
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//@ compile-flags: -Copt-level=0
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//@ edition: 2021
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use std::future::Future;
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trait Access {
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type Lister;
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fn list() -> impl Future<Output = Self::Lister> {
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async { todo!() }
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}
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}
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trait Foo {}
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impl Access for dyn Foo {
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type Lister = ();
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}
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fn main() {
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let svc = async {
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async { <dyn Foo>::list() }.await;
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};
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&svc as &dyn Service;
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}
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trait UnaryService {
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fn call2() {}
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}
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trait Unimplemented {}
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impl<T: Unimplemented> UnaryService for T {}
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struct Wrap<T>(T);
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impl<T: Send> UnaryService for Wrap<T> {}
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trait Service {
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fn call(&self);
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}
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impl<T: Send> Service for T {
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fn call(&self) {
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Wrap::<T>::call2();
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}
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}
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