1 files changed, 11 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-34373.rs b/tests/ui/issues/issue-34373.rs
new file mode 100644
index 000000000..ca24e37d9
--- /dev/null
+++ b/tests/ui/issues/issue-34373.rs
@@ -0,0 +1,11 @@
+#![allow(warnings)]
+
+trait Trait<T> {
+    fn foo(_: T) {}
+}
+
+pub struct Foo<T = Box<Trait<DefaultFoo>>>;  //~ ERROR cycle detected
+type DefaultFoo = Foo;
+
+fn main() {
+}