1 files changed, 20 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-29861.rs b/tests/ui/issues/issue-29861.rs
new file mode 100644
index 000000000..58f8eb536
--- /dev/null
+++ b/tests/ui/issues/issue-29861.rs
@@ -0,0 +1,20 @@
+pub trait MakeRef<'a> {
+    type Ref;
+}
+impl<'a, T: 'a> MakeRef<'a> for T {
+    type Ref = &'a T;
+}
+
+pub trait MakeRef2 {
+    type Ref2;
+}
+impl<'a, T: 'a> MakeRef2 for T {
+//~^ ERROR the lifetime parameter `'a` is not constrained
+    type Ref2 = <T as MakeRef<'a>>::Ref;
+}
+
+fn foo() -> <String as MakeRef2>::Ref2 { &String::from("foo") }
+
+fn main() {
+    println!("{}", foo());
+}