Lowering field access for anonymous adts

compiler/rustc_trait_selection/src/traits/select/mod.rs

@@ -2212,14 +2212,14 @@ impl<'tcx> SelectionContext<'_, 'tcx> {
 
             // FIXME(async_closures): These are never clone, for now.
             ty::CoroutineClosure(_, _) => None,
-            // `Copy` and `Clone` are automatically impelemented for an anonymous adt
+            // `Copy` and `Clone` are automatically implemented for an anonymous adt
             // if all of its fields are `Copy` and `Clone`
             ty::Adt(adt, args) if adt.is_anonymous() => {
                 // (*) binder moved here
                 Where(
                     obligation
                         .predicate
-                        .rebind(adt.all_fields().map(|f| f.ty(self.tcx(), args)).collect()),
+                        .rebind(adt.non_enum_variant().fields.iter().map(|f| f.ty(self.tcx(), args)).collect()),
                 )
             }