Replace manual iter exhaust with for_each(drop).

1 files changed, 1 insertions, 2 deletions

diff --git a/src/liballoc/btree/map.rs b/src/liballoc/btree/map.rs
index ed9c8c18f0d..37274a3c3ec 100644
--- a/src/liballoc/btree/map.rs
+++ b/src/liballoc/btree/map.rs
@@ -1260,8 +1260,7 @@ impl<K, V> IntoIterator for BTreeMap<K, V> {
 #[stable(feature = "btree_drop", since = "1.7.0")]
 impl<K, V> Drop for IntoIter<K, V> {
     fn drop(&mut self) {
-        for _ in &mut *self {
-        }
+        self.for_each(drop);
         unsafe {
             let leaf_node = ptr::read(&self.front).into_node();
             if let Some(first_parent) = leaf_node.deallocate_and_ascend() {