1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/impl-wf-cycle-1.rs b/src/test/ui/associated-types/impl-wf-cycle-1.rs
new file mode 100644
index 000000000..365eddaed
--- /dev/null
+++ b/src/test/ui/associated-types/impl-wf-cycle-1.rs
@@ -0,0 +1,27 @@
+// Regression test for #79714
+
+trait Baz {}
+impl Baz for () {}
+impl<T> Baz for (T,) {}
+
+trait Fiz {}
+impl Fiz for bool {}
+
+trait Grault {
+    type A;
+    type B;
+}
+
+impl<T: Grault> Grault for (T,)
+//~^ ERROR overflow evaluating the requirement `<(T,) as Grault>::A == _`
+where
+    Self::A: Baz,
+    Self::B: Fiz,
+{
+    type A = ();
+    type B = bool;
+}
+
+fn main() {
+    let x: <(_,) as Grault>::A = ();
+}