fix alignment issue

Signed-off-by: Connor Tsui <[email protected]>

Author: connortsui20

vortex-buffer/src/buffer.rs

@@ -9,7 +9,7 @@ use std::hash::{Hash, Hasher};
 use std::marker::PhantomData;
 use std::ops::{Deref, RangeBounds};
 
-use bytes::{Buf, Bytes, BytesMut};
+use bytes::{Buf, Bytes};
 use vortex_error::{VortexExpect, vortex_panic};
 
 use crate::debug::TruncatedDebug;
@@ -419,14 +419,8 @@ impl<T> Buffer<T> {
 
     /// Convert self into `BufferMut<T>`, cloning the data if there are multiple strong references.
     pub fn into_mut(self) -> BufferMut<T> {
-        let new_bytes = self.bytes.try_into_mut().unwrap_or_else(BytesMut::from);
-
-        BufferMut {
-            bytes: new_bytes,
-            length: self.length,
-            alignment: self.alignment,
-            _marker: Default::default(),
-        }
+        self.try_into_mut()
+            .unwrap_or_else(|buffer| BufferMut::<T>::copy_from(&buffer))
     }
 
     /// Returns whether a `Buffer<T>` is aligned to the given alignment.