Use parent function WfCheckingContext to check RPITIT.

1 files changed, 24 insertions, 0 deletions

diff --git a/src/test/ui/impl-trait/in-trait/where-clause.rs b/src/test/ui/impl-trait/in-trait/where-clause.rs
new file mode 100644
index 00000000000..87bac519cf3
--- /dev/null
+++ b/src/test/ui/impl-trait/in-trait/where-clause.rs
@@ -0,0 +1,24 @@
+// check-pass
+// edition: 2021
+
+#![feature(return_position_impl_trait_in_trait)]
+#![allow(incomplete_features)]
+
+use std::fmt::Debug;
+
+trait Foo<Item> {
+    fn foo<'a>(&'a self) -> impl Debug
+    where
+        Item: 'a;
+}
+
+impl<Item, D: Debug + Clone> Foo<Item> for D {
+    fn foo<'a>(&'a self) -> impl Debug
+    where
+        Item: 'a,
+    {
+        self.clone()
+    }
+}
+
+fn main() {}