Test an assoc. type in struct member def inside fn

src/test/ui/save-analysis/issue-64659.rs

@@ -0,0 +1,10 @@
+// check-pass
+// compile-flags: -Zsave-analysis
+
+trait Trait { type Assoc; }
+
+fn main() {
+    struct Data<T: Trait> {
+        x: T::Assoc,
+    }
+}