[Quickfix-developers] QuickFix 1.12.4 message_order assigment crash

[Alexander L. <Ale...@so...>]

Hello Everyone,
I'm having an issue with message_order on a client I recently ugraded to 1.12.4.
All works fine but after update i got 2 response from clients with next crash:

WARNING: Stack unwind information not available. Following frames may be wrong.
kernel32!RaiseException+0x52
vktt!_CxxThrowException+0x46
vktt!operator new+0x69
vktt!FIX::message_order::operator=+0x44
vktt!std::_Tmap_traits<int,FIX::FieldBase,FIX::message_order,std::allocator<std::pair<int const ,FIX::FieldBase> >,1>::_Tmap_traits<int,FIX::FieldBase,FIX::message_order,std::allocator<std::pair<int const ,FIX::FieldBase> >,1>+0x42
vktt!std::_Tree<std::_Tmap_traits<int,FIX::FieldBase,FIX::message_order,std::allocator<std::pair<int const ,FIX::FieldBase> >,1> >::_Tree<std::_Tmap_traits<int,FIX::FieldBase,FIX::message_order,std::allocator<std::pair<int const ,FIX::FieldBase> >,1> >+0x49
vktt!FIX::FieldMap::FieldMap+0x37
vktt!FIX::FieldMap::addGroup+0x7c
vktt!FIX::Message::setGroup+0x280
vktt!_fpclass+0xe84d
MSWSOCK+0x44b0

Unfortunately i dont know type of exception. 
Seems that copied message_order object has negative member m_largest.
Maybe someone have any idea? 

Thanks,
Sasha