1 files changed, 21 insertions, 0 deletions

diff --git a/src/test/ui/async-await/issues/issue-62517-1.rs b/src/test/ui/async-await/issues/issue-62517-1.rs
new file mode 100644
index 000000000..4689ce36a
--- /dev/null
+++ b/src/test/ui/async-await/issues/issue-62517-1.rs
@@ -0,0 +1,21 @@
+// Regression test for #62517. We used to ICE when you had an `async
+// fn` with an `impl Trait` return that mentioned a `dyn Bar` with no
+// explicit lifetime bound.
+//
+// edition:2018
+// check-pass
+
+trait FirstTrait {}
+trait SecondTrait {
+    type Item: ?Sized;
+}
+
+async fn foo(x: &str) -> impl SecondTrait<Item = dyn FirstTrait> {
+}
+
+
+impl<T> SecondTrait for T {
+    type Item = dyn FirstTrait;
+}
+
+fn main() { }