2 files changed, 6 insertions, 6 deletions

diff --git a/crates/ra_assists/src/ast_editor.rs b/crates/ra_assists/src/ast_editor.rs
index a710edce8..cf32ea52d 100644
--- a/crates/ra_assists/src/ast_editor.rs
+++ b/crates/ra_assists/src/ast_editor.rs
@@ -44,9 +44,9 @@ impl<N: AstNode> AstEditor<N> {
     fn insert_children(
         &self,
         position: InsertPosition<SyntaxElement>,
-        to_insert: impl Iterator<Item = SyntaxElement>,
+        mut to_insert: impl Iterator<Item = SyntaxElement>,
     ) -> N {
-        let new_syntax = insert_children(self.ast().syntax(), position, to_insert);
+        let new_syntax = insert_children(self.ast().syntax(), position, &mut to_insert);
         N::cast(new_syntax).unwrap()
     }
 
@@ -54,9 +54,9 @@ impl<N: AstNode> AstEditor<N> {
     fn replace_children(
         &self,
         to_delete: RangeInclusive<SyntaxElement>,
-        to_insert: impl Iterator<Item = SyntaxElement>,
+        mut to_insert: impl Iterator<Item = SyntaxElement>,
     ) -> N {
-        let new_syntax = replace_children(self.ast().syntax(), to_delete, to_insert);
+        let new_syntax = replace_children(self.ast().syntax(), to_delete, &mut to_insert);
         N::cast(new_syntax).unwrap()
     }
 
diff --git a/crates/ra_syntax/src/algo.rs b/crates/ra_syntax/src/algo.rs
index 45f624810..7ee5aa85b 100644
--- a/crates/ra_syntax/src/algo.rs
+++ b/crates/ra_syntax/src/algo.rs
@@ -70,7 +70,7 @@ pub enum InsertPosition<T> {
 pub fn insert_children(
     parent: &SyntaxNode,
     position: InsertPosition<SyntaxElement>,
-    to_insert: impl Iterator<Item = SyntaxElement>,
+    to_insert: &mut dyn Iterator<Item = SyntaxElement>,
 ) -> SyntaxNode {
     let mut delta = TextUnit::default();
     let to_insert = to_insert.map(|element| {
@@ -108,7 +108,7 @@ pub fn insert_children(
 pub fn replace_children(
     parent: &SyntaxNode,
     to_delete: RangeInclusive<SyntaxElement>,
-    to_insert: impl Iterator<Item = SyntaxElement>,
+    to_insert: &mut dyn Iterator<Item = SyntaxElement>,
 ) -> SyntaxNode {
     let start = position_of_child(parent, to_delete.start().clone());
     let end = position_of_child(parent, to_delete.end().clone());