From 303ee3fd8382947d0da7a728c728bc672dc0f7be Mon Sep 17 00:00:00 2001
From: Tim Diekmann <21277928+TimDiekmann@users.noreply.github.com>
Date: Thu, 20 Aug 2020 01:01:46 +0200
Subject: [PATCH] Add debug assertion for equal alignment in RawVec

---
 library/alloc/src/raw_vec.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/library/alloc/src/raw_vec.rs b/library/alloc/src/raw_vec.rs
index e00cb361c00..dafbb0acd11 100644
--- a/library/alloc/src/raw_vec.rs
+++ b/library/alloc/src/raw_vec.rs
@@ -494,6 +494,7 @@ where
     alloc_guard(new_layout.size())?;
 
     let memory = if let Some((ptr, old_layout)) = current_memory {
+        debug_assert_eq!(old_layout.align(), new_layout.align());
         unsafe { alloc.grow(ptr, old_layout, new_layout) }
     } else {
         alloc.alloc(new_layout)