From 69238c9de68b4939b88d3cfec74257da85dd0db5 Mon Sep 17 00:00:00 2001
From: Lukasz Anforowicz <lukasza@chromium.org>
Date: Tue, 29 Aug 2023 19:30:07 +0000
Subject: [PATCH] Verify alignment requirements of `f32` vs `u32` (and `f64` vs
 `u64`).

Fixes https://github.com/BurntSushi/byteorder/issues/194
---
 src/lib.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index cc37cca..317933d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -71,7 +71,7 @@ cases.
 #![cfg_attr(not(feature = "std"), no_std)]
 
 use core::{
-    convert::TryInto, fmt::Debug, hash::Hash, ptr::copy_nonoverlapping, slice,
+    convert::TryInto, fmt::Debug, hash::Hash, mem::align_of, ptr::copy_nonoverlapping, slice,
 };
 
 #[cfg(feature = "std")]
@@ -1202,6 +1202,7 @@ pub trait ByteOrder:
     #[inline]
     fn read_f32_into(src: &[u8], dst: &mut [f32]) {
         let dst = unsafe {
+            const _: () = assert!(align_of::<u32>() <= align_of::<f32>());
             slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u32, dst.len())
         };
         Self::read_u32_into(src, dst);
@@ -1263,6 +1264,7 @@ pub trait ByteOrder:
     #[inline]
     fn read_f64_into(src: &[u8], dst: &mut [f64]) {
         let dst = unsafe {
+            const _: () = assert!(align_of::<u64>() <= align_of::<f64>());
             slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u64, dst.len())
         };
         Self::read_u64_into(src, dst);