1 files changed, 28 insertions, 0 deletions
diff --git a/tests/ui/traits/object/bounds-cycle-2.rs b/tests/ui/traits/object/bounds-cycle-2.rs
new file mode 100644
index 00000000000..4c1df38058d
--- /dev/null
+++ b/tests/ui/traits/object/bounds-cycle-2.rs
@@ -0,0 +1,28 @@
+// Check that we don't have a cycle when we try to normalize `Self::V` in the
+// bound below.
+
+// check-pass
+
+trait Is {
+    type T;
+}
+
+impl<U> Is for U {
+    type T = U;
+}
+
+trait Super {
+    type V;
+}
+
+trait Obj: Super {
+    type U: Is<T = Self::V>;
+}
+
+fn is_obj<T: ?Sized + Obj>(_: &T) {}
+
+fn f(x: &dyn Obj<U = i32, V = i32>) {
+    is_obj(x)
+}
+
+fn main() {}