1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/traits/bound/recursion.rs b/src/test/ui/traits/bound/recursion.rs
new file mode 100644
index 000000000..0023ff654
--- /dev/null
+++ b/src/test/ui/traits/bound/recursion.rs
@@ -0,0 +1,20 @@
+// run-pass
+// pretty-expanded FIXME #23616
+
+trait I { fn i(&self) -> Self; }
+
+trait A<T:I> {
+    fn id(x:T) -> T { x.i() }
+}
+
+trait J<T> { fn j(&self) -> T; }
+
+trait B<T:J<T>> {
+    fn id(x:T) -> T { x.j() }
+}
+
+trait C {
+    fn id<T:J<T>>(x:T) -> T { x.j() }
+}
+
+pub fn main() { }