diff --git a/doc/move.qbk b/doc/move.qbk
index e1d61ae..99f2f3d 100644
--- a/doc/move.qbk
+++ b/doc/move.qbk
@@ -129,9 +129,12 @@ Consider a simple handle class that owns a resource and also provides copy seman
 
       clone_ptr& operator=(clone_ptr&& p)
       {
-         std::swap(ptr, p.ptr);
-         delete p.ptr;
-         p.ptr = 0;
+         if(this != &p)
+         {
+            std::swap(ptr, p.ptr);
+            delete p.ptr;
+            p.ptr = 0;
+         }
          return *this;
       }
 
@@ -171,7 +174,7 @@ You just need to follow these simple steps:
 
 * Put the following macro in the [*private] section:
   [macroref BOOST_COPYABLE_AND_MOVABLE BOOST_COPYABLE_AND_MOVABLE(classname)]
-* Left copy constructor as is.
+* Leave copy constructor as is.
 * Write a copy assignment taking the parameter as
   [macroref BOOST_COPY_ASSIGN_REF BOOST_COPY_ASSIGN_REF(classname)]
 * Write a move constructor and a move assignment taking the parameter as
@@ -787,10 +790,18 @@ Many thanks to all boosters that have tested, reviewed and improved the library.
 
 [section:release_notes Release Notes]
 
+[section:release_notes_boost_1_55_00 Boost 1.55 Release]
+
+*  Fixed bug  [@https://svn.boost.org/trac/boost/ticket/7952 #7952]).
+
+[endsect]
+
+
 [section:release_notes_boost_1_54_00 Boost 1.54 Release]
 
+
 *  Fixed bugs [@https://svn.boost.org/trac/boost/ticket/7969 #7969]),
-   [@https://svn.boost.org/trac/boost/ticket/8231 #8231]).
+              [@https://svn.boost.org/trac/boost/ticket/8231 #8231]).
 
 [endsect]
 
diff --git a/example/doc_file_descriptor.cpp b/example/doc_file_descriptor.cpp
index e4e6ba3..1dd7bc0 100644
--- a/example/doc_file_descriptor.cpp
+++ b/example/doc_file_descriptor.cpp
@@ -10,6 +10,7 @@
 //////////////////////////////////////////////////////////////////////////////
 
 #include <boost/move/detail/config_begin.hpp>
+#include <cassert>
 
 //[file_descriptor_def
 
@@ -24,8 +25,8 @@ class file_descriptor
       return 1;
    }
 
-   void operating_system_close_file(int)
-   {}
+   void operating_system_close_file(int fd)
+   {  (void)fd;   assert(fd != 0); }
    //->
    int os_descr_;
 
@@ -33,12 +34,12 @@ class file_descriptor
    BOOST_MOVABLE_BUT_NOT_COPYABLE(file_descriptor)
 
    public:
-   explicit file_descriptor(const char *filename = 0)          //Constructor
-      : os_descr_(filename ? operating_system_open_file(filename) : 0)
+   explicit file_descriptor(const char *filename)              //Constructor
+      : os_descr_(operating_system_open_file(filename))
    {  if(!os_descr_) throw std::runtime_error("file not found");  }
 
    ~file_descriptor()                                          //Destructor
-   {  if(!os_descr_)  operating_system_close_file(os_descr_);  }
+   {  if(os_descr_)  operating_system_close_file(os_descr_);  }
 
    file_descriptor(BOOST_RV_REF(file_descriptor) x)            // Move ctor
       :  os_descr_(x.os_descr_)
@@ -46,7 +47,7 @@ class file_descriptor
 
    file_descriptor& operator=(BOOST_RV_REF(file_descriptor) x) // Move assign
    {
-      if(!os_descr_) operating_system_close_file(os_descr_);
+      if(os_descr_) operating_system_close_file(os_descr_);
       os_descr_   = x.os_descr_;
       x.os_descr_ = 0;
       return *this;