Re: [Boost-bugs] [Boost C++ Libraries] #5789: Segmentation fault with serialization when register_type rearranged

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5789: Segmentation fault with serialization when register_type rearranged
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-07-15 20:49:28

#5789: Segmentation fault with serialization when register_type rearranged
---------------------------------------------------+------------------------
  Reporter:  Krzysztof Tomaszewski <kt@…>          |       Owner:  ramey        
      Type:  Bugs                                  |      Status:  closed       
 Milestone:  To Be Determined                      |   Component:  serialization
   Version:  Boost 1.47.0                          |    Severity:  Problem      
Resolution:  invalid                               |    Keywords:               
---------------------------------------------------+------------------------
Changes (by ramey):

  * status:  new => closed
  * resolution:  => invalid

Comment:

 If I understand your problem correctly

 "1) our program serializes some data with boost-serialization 2) we add
 new class registration, so function RegisterDerivedClasses? changes to
 something like this: --- template <class Archive> void
 RegisterDerivedClasses?(Archive& ar) {"

 I think the answer is the following:

 a) using the "registration method" adds data to the archive.
 b) adding another "registration method" adds more data to the archive.
 c) problem occurs when reading previously saved data with new program.

 and the solution is:

 a) remember that using the "registration method" is really no different
 then adding any kind of new data to the archive definition.
 b) adding any new data required using class versioning to keep things in
 sync.
 c) If you implement class versioning - I believe this will address this
 problem.

 I think I'm correct on this, so I'm going to close this item for now.

 Robert Ramey

 Robert Ramey

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5789#comment:4>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.