From 0fbcb7b873d140341fcfead9c47b1468617a596f Mon Sep 17 00:00:00 2001
From: Nikolai Vazquez <nvazquez1297@gmail.com>
Date: Mon, 25 Dec 2017 17:04:45 -0500
Subject: [PATCH] Remove transmute in From<&str> impls for Arc/Rc

---
 src/liballoc/arc.rs | 3 ++-
 src/liballoc/rc.rs  | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/liballoc/arc.rs b/src/liballoc/arc.rs
index 844b70835936f..185af8835d1e4 100644
--- a/src/liballoc/arc.rs
+++ b/src/liballoc/arc.rs
@@ -1377,7 +1377,8 @@ impl<'a, T: Clone> From<&'a [T]> for Arc<[T]> {
 impl<'a> From<&'a str> for Arc<str> {
     #[inline]
     fn from(v: &str) -> Arc<str> {
-        unsafe { mem::transmute(<Arc<[u8]>>::from(v.as_bytes())) }
+        let arc = Arc::<[u8]>::from(v.as_bytes());
+        unsafe { Arc::from_raw(Arc::into_raw(arc) as *const str) }
     }
 }
 
diff --git a/src/liballoc/rc.rs b/src/liballoc/rc.rs
index 358b5934b9231..59079f9ba76bc 100644
--- a/src/liballoc/rc.rs
+++ b/src/liballoc/rc.rs
@@ -1099,7 +1099,8 @@ impl<'a, T: Clone> From<&'a [T]> for Rc<[T]> {
 impl<'a> From<&'a str> for Rc<str> {
     #[inline]
     fn from(v: &str) -> Rc<str> {
-        unsafe { mem::transmute(<Rc<[u8]>>::from(v.as_bytes())) }
+        let rc = Rc::<[u8]>::from(v.as_bytes());
+        unsafe { Rc::from_raw(Rc::into_raw(rc) as *const str) }
     }
 }