1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/generic-associated-types/issue-81712-cyclic-traits.rs b/tests/ui/generic-associated-types/issue-81712-cyclic-traits.rs
new file mode 100644
index 000000000..a7cc9a605
--- /dev/null
+++ b/tests/ui/generic-associated-types/issue-81712-cyclic-traits.rs
@@ -0,0 +1,18 @@
+// Regression test for #81712.
+
+trait A {
+    type BType: B<AType = Self>;
+}
+
+trait B {
+    type AType: A<BType = Self>;
+}
+trait C {
+    type DType<T>: D<T, CType = Self>;
+}
+trait D<T> {
+    type CType: C<DType = Self>;
+    //~^ ERROR missing generics for associated type
+}
+
+fn main() {}