1 files changed, 22 insertions, 0 deletions
diff --git a/tests/ui/traits/next-solver/alias-relate/deeply-nested-no-hang.rs b/tests/ui/traits/next-solver/alias-relate/deeply-nested-no-hang.rs
new file mode 100644
index 000000000..91cfda37a
--- /dev/null
+++ b/tests/ui/traits/next-solver/alias-relate/deeply-nested-no-hang.rs
@@ -0,0 +1,22 @@
+// check-pass
+// compile-flags: -Znext-solver
+// regression test for trait-system-refactor-initiative#68
+trait Identity {
+    type Assoc: ?Sized;
+}
+
+impl<T: ?Sized> Identity for T {
+    type Assoc = T;
+}
+
+type Id<T> = <T as Identity>::Assoc;
+
+type Five<T> = Id<Id<Id<Id<Id<T>>>>>;
+type Ty<T> = Five<Five<Five<Five<Five<T>>>>>;
+
+trait Trait<T> {}
+
+impl<T> Trait<T> for Ty<T> {}
+impl Trait<u32> for Ty<i32> {}
+
+fn main() {}