more complete error message

src/test/compile-fail/issue-38919.rs

@@ -9,7 +9,7 @@
 // except according to those terms.
 
 fn foo<T: Iterator>() {
-    T::Item; //~ ERROR no associated item named `Item` found for type `T`
+    T::Item; //~ ERROR no associated item named `Item` found for type `T` in the current scope
 }
 
 fn main() { }