Auto merge of #42854 - razielgn:relaxed-debug-constraints-on-maps-iterators, r=sfackler

Relaxed Debug constraints on {HashMap,BTreeMap}::{Keys,Values}.

I has hit by this yesterday too. 😄
And I've realised that Debug for BTreeMap::{Keys,Values} wasn't formatting just keys and values respectively, but the whole map. 🤔

Fixed #41924

r? @jonhoo

1 files changed, 4 insertions, 4 deletions

diff --git a/src/liballoc/btree/map.rs b/src/liballoc/btree/map.rs
index d73c0254a74..a51c70159db 100644
--- a/src/liballoc/btree/map.rs
+++ b/src/liballoc/btree/map.rs
@@ -334,9 +334,9 @@ pub struct Keys<'a, K: 'a, V: 'a> {
 }
 
 #[stable(feature = "collection_debug", since = "1.17.0")]
-impl<'a, K: 'a + fmt::Debug, V: 'a + fmt::Debug> fmt::Debug for Keys<'a, K, V> {
+impl<'a, K: 'a + fmt::Debug, V: 'a> fmt::Debug for Keys<'a, K, V> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_list().entries(self.inner.clone()).finish()
+        f.debug_list().entries(self.clone()).finish()
     }
 }
 
@@ -353,9 +353,9 @@ pub struct Values<'a, K: 'a, V: 'a> {
 }
 
 #[stable(feature = "collection_debug", since = "1.17.0")]
-impl<'a, K: 'a + fmt::Debug, V: 'a + fmt::Debug> fmt::Debug for Values<'a, K, V> {
+impl<'a, K: 'a, V: 'a + fmt::Debug> fmt::Debug for Values<'a, K, V> {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_list().entries(self.inner.clone()).finish()
+        f.debug_list().entries(self.clone()).finish()
     }
 }