From 645f685e1b05f3f62de26ea1579861e83cbd0d74 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Mon, 27 May 2019 22:40:13 +0200
Subject: [PATCH] Box::into_vec: use Box::into_raw instead of mem::forget

---
 src/liballoc/slice.rs | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/liballoc/slice.rs b/src/liballoc/slice.rs
index 8768f1ff081..aeb7f90d3e6 100644
--- a/src/liballoc/slice.rs
+++ b/src/liballoc/slice.rs
@@ -137,17 +137,16 @@ pub use hack::to_vec;
 // `core::slice::SliceExt` - we need to supply these functions for the
 // `test_permutations` test
 mod hack {
-    use core::mem;
-
     use crate::boxed::Box;
     use crate::vec::Vec;
     #[cfg(test)]
     use crate::string::ToString;
 
-    pub fn into_vec<T>(mut b: Box<[T]>) -> Vec<T> {
+    pub fn into_vec<T>(b: Box<[T]>) -> Vec<T> {
         unsafe {
-            let xs = Vec::from_raw_parts(b.as_mut_ptr(), b.len(), b.len());
-            mem::forget(b);
+            let len = b.len();
+            let b = Box::into_raw(b);
+            let xs = Vec::from_raw_parts(b as *mut T, len, len);
             xs
         }
     }