From 6fbdaf42097f2e8fda09692693c7a27acb4c0ef2 Mon Sep 17 00:00:00 2001
From: Mazdak Farrokhzad <twingoow@gmail.com>
Date: Thu, 15 Mar 2018 18:04:45 +0100
Subject: [PATCH] unstabilize FusedIterator for Flatten since Flatten is
 unstable

---
 src/libcore/iter/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libcore/iter/mod.rs b/src/libcore/iter/mod.rs
index a6802d606ca8c..b1b783b47c72b 100644
--- a/src/libcore/iter/mod.rs
+++ b/src/libcore/iter/mod.rs
@@ -2605,7 +2605,7 @@ impl<I, U> DoubleEndedIterator for Flatten<I>
     }
 }
 
-#[stable(feature = "fused", since = "1.26.0")]
+#[unstable(feature = "iterator_flatten", issue = "48213")]
 impl<I, U> FusedIterator for Flatten<I>
     where I: FusedIterator, U: Iterator,
           I::Item: IntoIterator<IntoIter = U, Item = U::Item> {}