From 456738e3d1ad7dadffaed287d3055ca38b5fa375 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Naz=C4=B1m=20Can=20Alt=C4=B1nova?= <canaltinova@gmail.com>
Date: Mon, 10 Aug 2020 17:47:40 +0200
Subject: [PATCH] Only print values in the Debug of HashMap::ValuesMut struct

---
 library/std/src/collections/hash/map.rs | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/library/std/src/collections/hash/map.rs b/library/std/src/collections/hash/map.rs
index 70f7214e2f1..968f81c2c35 100644
--- a/library/std/src/collections/hash/map.rs
+++ b/library/std/src/collections/hash/map.rs
@@ -1885,13 +1885,9 @@ impl<K, V> ExactSizeIterator for ValuesMut<'_, K, V> {
 impl<K, V> FusedIterator for ValuesMut<'_, K, V> {}
 
 #[stable(feature = "std_debug", since = "1.16.0")]
-impl<K, V> fmt::Debug for ValuesMut<'_, K, V>
-where
-    K: fmt::Debug,
-    V: fmt::Debug,
-{
+impl<K, V: fmt::Debug> fmt::Debug for ValuesMut<'_, K, V> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_list().entries(self.inner.iter()).finish()
+        f.debug_list().entries(self.inner.iter().map(|(_, val)| val)).finish()
     }
 }