From 950ac2229f81c42e6625e6c84e4e4353a6f1a7bd Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Fri, 2 Mar 2018 12:45:27 +1100
Subject: [PATCH] alloc/foreign: correctly rebase 'offset'

---
 alloc/raw/aligned/foreign.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/alloc/raw/aligned/foreign.hpp b/alloc/raw/aligned/foreign.hpp
index 4ea054d0..6c02412f 100644
--- a/alloc/raw/aligned/foreign.hpp
+++ b/alloc/raw/aligned/foreign.hpp
@@ -70,7 +70,9 @@ namespace util::alloc::raw::aligned {
 
         auto offset (const void *ptr) const
         {
-            return m_successor.offset (ptr);
+            return m_successor.offset (
+                reinterpret_cast<const std::byte*> (ptr) + m_offset
+            );
         }
 
         auto data (void)       { return m_successor.data () - m_offset; }