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#![deny(unused_must_use)]
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use async_trait::async_trait;
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#[async_trait]
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trait Interface {
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async fn f(&self);
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}
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struct Thing;
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#[async_trait]
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impl Interface for Thing {
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async fn f(&self) {}
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}
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pub async fn f() {
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Thing.f();
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}
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fn main() {}
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