Fix subst issues with RPITIT

1 files changed, 18 insertions, 0 deletions

diff --git a/src/test/ui/impl-trait/in-trait/issue-102301.rs b/src/test/ui/impl-trait/in-trait/issue-102301.rs
new file mode 100644
index 00000000000..a93714a658e
--- /dev/null
+++ b/src/test/ui/impl-trait/in-trait/issue-102301.rs
@@ -0,0 +1,18 @@
+// check-pass
+
+#![feature(return_position_impl_trait_in_trait)]
+#![allow(incomplete_features)]
+
+trait Foo<T> {
+    fn foo<F2: Foo<T>>(self) -> impl Foo<T>;
+}
+
+struct Bar;
+
+impl Foo<u8> for Bar {
+    fn foo<F2: Foo<u8>>(self) -> impl Foo<u8> {
+        self
+    }
+}
+
+fn main() {}