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-rw-r--r--tests/ui/async-await/in-trait/fn-not-async-err2.rs19
1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/async-await/in-trait/fn-not-async-err2.rs b/tests/ui/async-await/in-trait/fn-not-async-err2.rs
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index 00000000000..2c4ed553580
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+++ b/tests/ui/async-await/in-trait/fn-not-async-err2.rs
@@ -0,0 +1,19 @@
+// edition: 2021
+
+#![feature(async_fn_in_trait)]
+#![allow(incomplete_features)]
+
+use std::future::Future;
+
+trait MyTrait {
+    async fn foo(&self) -> i32;
+}
+
+impl MyTrait for i32 {
+    fn foo(&self) -> impl Future<Output = i32> {
+        //~^ ERROR `impl Trait` only allowed in function and inherent method return types, not in `impl` method return [E0562]
+        async { *self }
+    }
+}
+
+fn main() {}