From 79b53665a7c61d171fb8c5ad0b73b371f9ee6ba7 Mon Sep 17 00:00:00 2001
From: Dmitry Mottl <dmitry.mottl@gmail.com>
Date: Mon, 13 Feb 2023 10:40:24 +0200
Subject: [PATCH] Fixes double bug in Send-Sync example (#401)

---
 src/send-and-sync.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/send-and-sync.md b/src/send-and-sync.md
index 34539da..808a5c3 100644
--- a/src/send-and-sync.md
+++ b/src/send-and-sync.md
@@ -94,6 +94,7 @@ to the heap.
 use std::{
     mem::{align_of, size_of},
     ptr,
+    cmp::max,
 };
 
 struct Carton<T>(ptr::NonNull<T>);
@@ -105,8 +106,8 @@ impl<T> Carton<T> {
         let mut memptr: *mut T = ptr::null_mut();
         unsafe {
             let ret = libc::posix_memalign(
-                (&mut memptr).cast(),
-                align_of::<T>(),
+                (&mut memptr as *mut *mut T).cast(),
+                max(align_of::<T>(), size_of::<usize>()),
                 size_of::<T>()
             );
             assert_eq!(ret, 0, "Failed to allocate or invalid alignment");