Import the prelude

crates/ra_syntax/src/ast/generated.rs

@@ -4210,6 +4210,7 @@ impl ToOwned for UseItem {
 }
 
 
+impl ast::AttrsOwner for UseItem {}
 impl UseItem {
     pub fn use_tree(&self) -> Option<&UseTree> {
         super::child_opt(self)

crates/ra_syntax/src/grammar.ron

@@ -596,7 +596,8 @@ Grammar(
             options: [ "Pat", "TypeRef" ],
         ),
         "UseItem": (
-            options: [ "UseTree" ]
+            traits: ["AttrsOwner"],
+            options: [ "UseTree" ],
         ),
         "UseTree": (
             options: [ "Path", "UseTreeList", "Alias" ]