From 0778ac81c8e73b88fdae07e737bfc3b8fd3b92fb Mon Sep 17 00:00:00 2001
From: Tim Nielens <tim.nielens@gmail.com>
Date: Mon, 29 Jan 2018 16:52:22 +0100
Subject: [PATCH] #1121: already fixed, adding a test

---
 tests/ui/while_loop.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tests/ui/while_loop.rs b/tests/ui/while_loop.rs
index b7ef39da8..b4c3eb0f5 100644
--- a/tests/ui/while_loop.rs
+++ b/tests/ui/while_loop.rs
@@ -193,4 +193,12 @@ fn refutable() {
             break None;
         }
     };
+
+    use std::collections::HashSet;
+    let mut values = HashSet::new();
+    values.insert(1);
+
+    while let Some(&value) = values.iter().next() {
+        values.remove(&value);
+    }
 }