1 files changed, 11 insertions, 0 deletions
diff --git a/tests/src/mutually-recursive-traits.rs b/tests/src/mutually-recursive-traits.rs
new file mode 100644
index 00000000..351763b2
--- /dev/null
+++ b/tests/src/mutually-recursive-traits.rs
@@ -0,0 +1,11 @@
+//@ [lean] known-failure
+//@ [coq,fstar] skip
+//@ subdir=misc
+pub trait Trait1 {
+    type T: Trait2;
+}
+
+pub trait Trait2: Trait1 {}
+
+pub trait T1<T: T2<Self>>: Sized {}
+pub trait T2<T: T1<Self>>: Sized {}