1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/impl-trait/in-trait/issue-102571.rs b/src/test/ui/impl-trait/in-trait/issue-102571.rs
new file mode 100644
index 000000000..61c91e644
--- /dev/null
+++ b/src/test/ui/impl-trait/in-trait/issue-102571.rs
@@ -0,0 +1,24 @@
+#![feature(return_position_impl_trait_in_trait)]
+#![allow(incomplete_features)]
+
+use std::fmt::Display;
+use std::ops::Deref;
+
+trait Foo {
+    fn bar(self) -> impl Deref<Target = impl Display + ?Sized>;
+}
+
+struct A;
+
+impl Foo for A {
+    fn bar(self) -> &'static str {
+        "Hello, world"
+    }
+}
+
+fn foo<T: Foo>(t: T) {
+    let () = t.bar();
+    //~^ ERROR mismatched types
+}
+
+fn main() {}