1 files changed, 25 insertions, 0 deletions
diff --git a/src/test/ui/traits/object/bounds-cycle-4.rs b/src/test/ui/traits/object/bounds-cycle-4.rs
new file mode 100644
index 000000000..f83cb75c7
--- /dev/null
+++ b/src/test/ui/traits/object/bounds-cycle-4.rs
@@ -0,0 +1,25 @@
+// Check that we don't have a cycle when we try to normalize `Self::U` in the
+// bound below. Make sure that having a lifetime on the trait object doesn't break things
+
+// check-pass
+
+trait Is {
+    type T;
+}
+
+impl<U> Is for U {
+    type T = U;
+}
+
+trait Obj<'a> {
+    type U: Is<T = Self::V>;
+    type V;
+}
+
+fn is_obj<'a, T: ?Sized + Obj<'a>>(_: &T) {}
+
+fn f<'a>(x: &dyn Obj<'a, U = i32, V = i32>) {
+    is_obj(x)
+}
+
+fn main() {}