add and move trait solver cycle tests

tests/ui/traits/new-solver/overflow/recursive-self-normalization-2.rs

@@ -0,0 +1,20 @@
+//~ ERROR overflow
+// compile-flags: -Ztrait-solver=next
+
+trait Foo1 {
+    type Assoc1;
+}
+
+trait Foo2 {
+    type Assoc2;
+}
+
+trait Bar {}
+fn needs_bar<S: Bar>() {}
+
+fn test<T: Foo1<Assoc1 = <T as Foo2>::Assoc2> + Foo2<Assoc2 = <T as Foo1>::Assoc1>>() {
+    needs_bar::<T::Assoc1>();
+    //~^ ERROR overflow evaluating the requirement `<T as Foo1>::Assoc1: Bar`
+}
+
+fn main() {}