From f97b3f08cde6dff89c8c236fce2479725d7f909e Mon Sep 17 00:00:00 2001
From: Stepan Koltsov <stepan.koltsov@gmail.com>
Date: Fri, 24 Mar 2017 06:18:23 +0300
Subject: [PATCH] Unnecessary iteration in BTreeMap::drop

`IntoIter::drop` already iterates.
---
 src/libcollections/btree/map.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/libcollections/btree/map.rs b/src/libcollections/btree/map.rs
index bed216ba3d1..dcacef4f0f0 100644
--- a/src/libcollections/btree/map.rs
+++ b/src/libcollections/btree/map.rs
@@ -141,8 +141,7 @@ pub struct BTreeMap<K, V> {
 unsafe impl<#[may_dangle] K, #[may_dangle] V> Drop for BTreeMap<K, V> {
     fn drop(&mut self) {
         unsafe {
-            for _ in ptr::read(self).into_iter() {
-            }
+            drop(ptr::read(self).into_iter());
         }
     }
 }