From 1977c62339acceabe711d8ca6bf9404475c7f75d Mon Sep 17 00:00:00 2001
From: Joe ST <joe@fbstj.net>
Date: Wed, 23 May 2018 15:01:11 +0100
Subject: [PATCH] move type def out of unsafe block

from https://github.com/rust-lang/rust/pull/50863#discussion_r190213000

move the union definition outside of the unsafe block
---
 src/libcore/str/mod.rs | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index 70aaf10f421..13d808ede5f 100644
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -2246,13 +2246,11 @@ pub fn is_char_boundary(&self, index: usize) -> bool {
     #[inline(always)]
     #[rustc_const_unstable(feature="const_str_as_bytes")]
     pub const fn as_bytes(&self) -> &[u8] {
-        unsafe {
-            union Slices<'a> {
-                str: &'a str,
-                slice: &'a [u8],
-            }
-            Slices { str: self }.slice
+        union Slices<'a> {
+            str: &'a str,
+            slice: &'a [u8],
         }
+        unsafe { Slices { str: self }.slice }
     }
 
     /// Converts a mutable string slice to a mutable byte slice. To convert the
-- 
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