1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/impl-trait/async_scope_creep.rs b/src/test/ui/impl-trait/async_scope_creep.rs
new file mode 100644
index 000000000..7a9d64d33
--- /dev/null
+++ b/src/test/ui/impl-trait/async_scope_creep.rs
@@ -0,0 +1,28 @@
+#![feature(type_alias_impl_trait)]
+// edition:2021
+// check-pass
+
+struct Pending {}
+
+struct CantOpen {}
+
+trait AsyncRead {}
+
+impl AsyncRead for i32 {}
+
+type PendingReader<'a> = impl AsyncRead + 'a;
+
+type OpeningReadFuture<'a> =
+    impl std::future::Future<Output = Result<PendingReader<'a>, CantOpen>>;
+
+impl Pending {
+    async fn read(&mut self) -> Result<impl AsyncRead + '_, CantOpen> {
+        Ok(42)
+    }
+
+    fn read_fut(&mut self) -> OpeningReadFuture<'_> {
+        self.read()
+    }
+}
+
+fn main() {}