[Boost-bugs] [Boost C++ Libraries] #6730: error reading archive created by old version when it contains pointer

Subject: [Boost-bugs] [Boost C++ Libraries] #6730: error reading archive created by old version when it contains pointer
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-03-24 06:11:08

#6730: error reading archive created by old version when it contains pointer
------------------------------------------------+---------------------------
 Reporter:  d s m a l l @…                      |        Type:  Bugs            
   Status:  new                                 |   Milestone:  To Be Determined
Component:  None                                |     Version:  Boost 1.45.0    
 Severity:  Problem                             |    Keywords:                  
------------------------------------------------+---------------------------
 Problem is similar to ticket 4660.  Fwiw we just discovered a gap
 in our unit tests. :(

 Code below contains our local fix.  Note that we only have used
 lib ver 3 and lib ver 5 and that this is the reason the fix only
 targets those versions.

 One last word, I checked the latest code ( 1.49 ) and it seems to
 contain the same flaw as 1.45.

 {{{
     void load_override(class_id_type & t, int version){
         library_version_type lvt = this->get_library_version();
         if(boost::archive::library_version_type(7) < lvt){
             this->detail_common_iarchive::load_override(t, version);
         }
         else
         if(boost::archive::library_version_type(6) < lvt){
             int_least16_t x=0;
             * this->This() >> x;
             t = boost::archive::class_id_type(x);
         }
         else
         if(boost::archive::library_version_type(3) == lvt ||
 boost::archive::library_version_type(5) == lvt ){
 #pragma message( "CTMS fix for serialization bug ( lack of backwards
 compatability ) introduced by boost 1.45." )
             int_least16_t  x=0;
             * this->This() >> x;
             t = boost::archive::class_id_type(x);
         }
         else{
             int x=0;
             * this->This() >> x;
             t = boost::archive::class_id_type(x);
         }
     }

 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6730>
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