diff --git a/tests/ui/impl-trait/mapping-duplicated-lifetimes-issue-114597.rs b/tests/ui/impl-trait/mapping-duplicated-lifetimes-issue-114597.rs
new file mode 100644
index 000000000000..a2dd0a9308d3
--- /dev/null
+++ b/tests/ui/impl-trait/mapping-duplicated-lifetimes-issue-114597.rs
@@ -0,0 +1,15 @@
+// check-pass
+// issue: 114597
+// edition: 2021
+
+struct A<'a> {
+    dat: &'a (),
+}
+
+impl<'a> A<'a> {
+    async fn a(&self) -> impl Iterator<Item = std::iter::Repeat<()>> {
+        std::iter::repeat(()).map(|()| std::iter::repeat(()))
+    }
+}
+
+fn main() {}