From 3dc4f33ad561ec494f693954fc3d381e1828d495 Mon Sep 17 00:00:00 2001
From: Daniel James <daniel@calamity.org.uk>
Date: Sun, 17 Dec 2017 12:16:08 +0000
Subject: [PATCH] Don't call deallocate with null pointers

---
 include/boost/functional/factory.hpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/include/boost/functional/factory.hpp b/include/boost/functional/factory.hpp
index 70a6f9c..8f59963 100644
--- a/include/boost/functional/factory.hpp
+++ b/include/boost/functional/factory.hpp
@@ -116,13 +116,15 @@ namespace boost
 
             void operator()(value_type* ptr) const
             {
-                if (!! ptr) ptr->~value_type();
+                if (!! ptr) {
+                    ptr->~value_type();
 #if defined(BOOST_NO_CXX11_ALLOCATOR)
-                const_cast<allocator_type*>(static_cast<allocator_type const*>(
-                    this))->deallocate(ptr,1);
+                    const_cast<allocator_type*>(static_cast<allocator_type const*>(
+                        this))->deallocate(ptr,1);
 #else
-                allocator_traits::deallocate(this->get_allocator(),ptr,1);
+                    allocator_traits::deallocate(this->get_allocator(),ptr,1);
 #endif
+                }
             }
         };