Add debug assertion for equal alignment in RawVec

diff --git a/library/alloc/src/raw_vec.rs b/library/alloc/src/raw_vec.rs
index e00cb361c0019f8400365ee51115f6fef44a98aa..dafbb0acd1186b2130d8e3468f16240f9193fcf8 100644 (file)
--- a/library/alloc/src/raw_vec.rs
+++ b/library/alloc/src/raw_vec.rs
@@ -494,6 +494,7 @@ fn finish_grow<A>(
     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)