I haven't tried this yet on Linux but so far on Gcc for Wndows my test application segfaults on an allocation routine. Here is the backtrace: #0 0x00415ace in boost::simple_segregated_storage<unsigned int>::try_malloc_n (start=@0x22fc00, n=16, partition_size=4) at simple_segregated_storage.hpp:234 #1 0x00415bc7 in boost::simple_segregated_storage<unsigned int>::malloc_n (this=0x463010, n=17, partition_size=4) at simple_segregated_storage.hpp:256 #2 0x0041c7f2 in boost::pool<boost::default_user_allocator_new_delete>::ordered_malloc (this=0x463010, n=68) at pool.hpp:511 #3 0x0041fb25 in boost::detail::sh::pool::allocate (this=0x463010, s=68) at sh_owned_base_nt.hpp:103 #4 0x00426669 in boost::detail::sh::shifted<std::_List_node<boost::detail::sh::shifted_ptr<vector>, boost::detail::sh::shifted_allocator<boost::detail::sh::shifted_ptr<vector>
::operator new (s=68) at sh_owned_base_nt.hpp:213 #5 0x0041f420 in boost::detail::sh::shifted_allocator<std::_List_node<boost::detail::sh::shifted_ptr<vector>, boost::detail::sh::shifted_allocator<boost::detail::sh::shifted_ptr<vector> ::allocate (this=0x3e5094, s=1) at shifted_allocator.hpp:83 #6 0x0044aa5d in std::_List_base<boost::detail::sh::shifted_ptr<vector>, boost::detail::sh::shifted_allocator<boost::detail::sh::shifted_ptr<vector> ::_M_get_node (this=0x3e5094) at stl_list.h:333 #7 0x00453ff2 in std::list<boost::detail::sh::shifted_ptr<vector>, boost::detail::sh::shifted_allocator<boost::detail::sh::shifted_ptr<vector> ::_M_create_node (this=0x3e5094, __x=@0x22ff50) at stl_list.h:457 #8 0x0045414c in std::list<boost::detail::sh::shifted_ptr<vector>, boost::detail::sh::shifted_allocator<boost::detail::sh::shifted_ptr<vector> ::_M_insert (this=0x3e5094, __position={_M_node = 0x3e50c8}, __x=@0x22ff50) at stl_list.h:1185 #9 0x0045418d in std::list<boost::detail::sh::shifted_ptr<vector>, boost::detail::sh::shifted_allocator<boost::detail::sh::shifted_ptr<vector> ::push_back (this=0x3e5094, __x=@0x22ff50) at stl_list.h:807 #10 0x00401708 in main () at shifted_ptr_test2.cpp:102
-Phil