1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/impl-wf-cycle-2.rs b/src/test/ui/associated-types/impl-wf-cycle-2.rs
new file mode 100644
index 000000000..f2f3072e3
--- /dev/null
+++ b/src/test/ui/associated-types/impl-wf-cycle-2.rs
@@ -0,0 +1,15 @@
+// Regression test for #79714
+
+trait Grault {
+    type A;
+}
+
+impl<T: Grault> Grault for (T,)
+//~^ ERROR overflow evaluating the requirement `<(T,) as Grault>::A == _`
+where
+    Self::A: Copy,
+{
+    type A = ();
+}
+
+fn main() {}