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diff --git a/tests/ui/async-await/in-trait/async-generics.stderr b/tests/ui/async-await/in-trait/async-generics.stderr
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+++ b/tests/ui/async-await/in-trait/async-generics.stderr
@@ -0,0 +1,37 @@
+error[E0311]: the parameter type `U` may not live long enough
+  --> $DIR/async-generics.rs:9:28
+   |
+LL |     async fn foo(&self) -> &(T, U);
+   |                            ^^^^^^^
+   |
+note: the parameter type `U` must be valid for the anonymous lifetime defined here...
+  --> $DIR/async-generics.rs:9:18
+   |
+LL |     async fn foo(&self) -> &(T, U);
+   |                  ^^^^^
+note: ...so that the reference type `&(T, U)` does not outlive the data it points at
+  --> $DIR/async-generics.rs:9:28
+   |
+LL |     async fn foo(&self) -> &(T, U);
+   |                            ^^^^^^^
+
+error[E0311]: the parameter type `T` may not live long enough
+  --> $DIR/async-generics.rs:9:28
+   |
+LL |     async fn foo(&self) -> &(T, U);
+   |                            ^^^^^^^
+   |
+note: the parameter type `T` must be valid for the anonymous lifetime defined here...
+  --> $DIR/async-generics.rs:9:18
+   |
+LL |     async fn foo(&self) -> &(T, U);
+   |                  ^^^^^
+note: ...so that the reference type `&(T, U)` does not outlive the data it points at
+  --> $DIR/async-generics.rs:9:28
+   |
+LL |     async fn foo(&self) -> &(T, U);
+   |                            ^^^^^^^
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0311`.