2 files changed, 11 insertions, 5 deletions

diff --git a/crates/ra_assists/src/assists/add_missing_impl_members.rs b/crates/ra_assists/src/assists/add_missing_impl_members.rs
index c2e3eb06b..6fd1c3753 100644
--- a/crates/ra_assists/src/assists/add_missing_impl_members.rs
+++ b/crates/ra_assists/src/assists/add_missing_impl_members.rs
@@ -75,10 +75,13 @@ fn add_missing_impl_members_inner(
 
     ctx.add_action(AssistId(assist_id), label, |edit| {
         let n_existing_items = impl_item_list.impl_items().count();
-        let items = missing_items.into_iter().map(|it| match it {
-            ast::ImplItem::FnDef(def) => edit::strip_attrs_and_docs(add_body(def).into()),
-            _ => edit::strip_attrs_and_docs(it),
-        });
+        let items = missing_items
+            .into_iter()
+            .map(|it| match it {
+                ast::ImplItem::FnDef(def) => ast::ImplItem::FnDef(add_body(def)),
+                _ => it,
+            })
+            .map(|it| edit::strip_attrs_and_docs(&it));
         let new_impl_item_list = impl_item_list.append_items(items);
         let cursor_position = {
             let first_new_item = new_impl_item_list.impl_items().nth(n_existing_items).unwrap();
diff --git a/crates/ra_syntax/src/ast/edit.rs b/crates/ra_syntax/src/ast/edit.rs
index d0857d88b..03f3b5fbb 100644
--- a/crates/ra_syntax/src/ast/edit.rs
+++ b/crates/ra_syntax/src/ast/edit.rs
@@ -187,6 +187,7 @@ impl ast::RecordFieldList {
 }
 
 impl ast::TypeParam {
+    #[must_use]
     pub fn remove_bounds(&self) -> ast::TypeParam {
         let colon = match self.colon_token() {
             Some(it) => it,
@@ -200,7 +201,8 @@ impl ast::TypeParam {
     }
 }
 
-pub fn strip_attrs_and_docs<N: ast::AttrsOwner>(node: N) -> N {
+#[must_use]
+pub fn strip_attrs_and_docs<N: ast::AttrsOwner>(node: &N) -> N {
     N::cast(strip_attrs_and_docs_inner(node.syntax().clone())).unwrap()
 }
 
@@ -217,6 +219,7 @@ fn strip_attrs_and_docs_inner(mut node: SyntaxNode) -> SyntaxNode {
     node
 }
 
+#[must_use]
 pub fn replace_descendants<N: AstNode, D: AstNode>(
     parent: &N,
     replacement_map: impl Iterator<Item = (D, D)>,