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-rw-r--r--src/libsyntax/fold.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/fold.rs b/src/libsyntax/fold.rs
index 7806a27c53e..14742d2e74c 100644
--- a/src/libsyntax/fold.rs
+++ b/src/libsyntax/fold.rs
@@ -353,7 +353,7 @@ pub fn noop_fold_view_path<T: Folder>(view_path: P<ViewPath>, fld: &mut T) -> P<
 }
 
 pub fn fold_attrs<T: Folder>(attrs: Vec<Attribute>, fld: &mut T) -> Vec<Attribute> {
-    attrs.into_iter().flat_map(|x| fld.fold_attribute(x).into_iter()).collect()
+    attrs.into_iter().flat_map(|x| fld.fold_attribute(x)).collect()
 }
 
 pub fn noop_fold_arm<T: Folder>(Arm {attrs, pats, guard, body}: Arm, fld: &mut T) -> Arm {