Using Boost 1.36, I'm seeing a crash when serializing a 256K malloc block using binary_object to an XML archive, something like this: using namespace boost; serialization::binary_object dataObject = serialization::make_binary_object(dataBlock, dataSize); ar << serialization::make_nvp("data_contents", dataObject); The crash is in boost::archive::iterators::transform_width::fill () template CharType transform_width::fill(){ CharType retval = 0; unsigned int missing_bits = BitsOut; for(;;){ unsigned int bcount; if(! m_bufferfull){ m_buffer = * this->base_reference(); <-------- crash here m_bufferfull = true; bcount = BitsIn; } else ... and the stack back up to my object serialization looks like: #0 0x0008f12e in boost::archive::iterators::transform_width::fill () at transform_width.hpp:139 #1 0x0008f12e in boost::archive::iterators::transform_width::dereference_impl () at transform_width.hpp:71 #2 0x0008f12e in boost::iterator_facade, char, boost::single_pass_traversal_tag, char, int>::operator* () at transform_width.hpp:78 #3 0x0008f12e in dereference > [inlined] () at transform_width.hpp:137 #4 0x0008f12e in boost::archive::iterators::transform_width::dereference () at transform_width.hpp:635 #5 0x0008f12e in boost ::iterator_facade < boost ::transform_iterator , boost::use_default, boost::use_default>, char, boost::single_pass_traversal_tag, char, int>::operator* () at transform_width.hpp:517 #6 0x0008f12e in dereference < boost ::transform_iterator , boost::use_default, boost::use_default> > [inlined] () at transform_width.hpp:80 #7 0x0008f12e in boost ::transform_iterator , boost::use_default, boost::use_default>::dereference () at transform_width.hpp:635 #8 0x0008f12e in boost ::archive ::iterators ::insert_linebreaks < boost ::archive ::iterators ::base64_from_binary, char>, 72, char const>::dereference () at insert_linebreaks.hpp:517 #9 0x0008f12e in dereference < boost ::archive ::iterators ::insert_linebreaks < boost ::archive ::iterators ::base64_from_binary, char>, 72, const char> > [inlined] () at insert_linebreaks.hpp:517 #10 0x0008f12e in boost ::iterator_facade < boost ::archive ::iterators ::insert_linebreaks < boost ::archive ::iterators ::base64_from_binary, char>, 72, char const>, char const, boost::single_pass_traversal_tag, char const, int>::operator* () at iterator_facade.hpp:635 #11 0x0008f12e in copy < boost ::archive ::iterators ::insert_linebreaks < boost ::archive ::iterators ::base64_from_binary, char>, 72, const char>, boost::archive::iterators::ostream_iterator<char> > [inlined] () at iterator_facade.hpp:270 #12 0x0008f12e in copy < boost ::archive ::iterators ::insert_linebreaks < boost ::archive ::iterators ::base64_from_binary, char>, 72, const char>, boost::archive::iterators::ostream_iterator<char> > [inlined] () at iterator_facade.hpp:270 #13 0x0008f12e in boost::archive::basic_text_oprimitivestd::ostream::save_binary (this=0xbffff178, address=0x423000, count=262144) at libs/ serialization/src/basic_text_oprimitive.cpp:317 #14 0x000aaae4 in boost ::archive ::xml_oarchive_implboost::archive::xml_oarchive::save_binary (this=0xbffff168, address=0x463000, count=4599808) at libs/ serialization/src/basic_text_oprimitive.cpp:317 #15 0x00054032 in boost ::serialization::binary_object::saveboost::archive::xml_oarchive (this=0xbfffe730, ar=@0xbffff168) at libs/serialization/src/ basic_text_oprimitive.cpp:317 #16 0x00054059 in boost ::serialization::access::member_save (ar=@0xbffff168, t=@0xbfffe730, file_version=0) at libs/serialization/src/ basic_text_oprimitive.cpp:317 #17 0x00054081 in boost ::serialization::detail::member_saver::invoke (ar=@0xbffff168, t=@0xbfffe730, file_version=0) at libs/serialization/src/ basic_text_oprimitive.cpp:317 #18 0x000540a9 in boost::serialization::split_member (ar=@0xbffff168, t=@0xbfffe730, file_version=0) at libs/serialization/src/basic_text_oprimitive.cpp:317 #19 0x000540d1 in boost ::serialization ::binary_object::serializeboost::archive::xml_oarchive (this=0xbfffe730, ar=@0xbffff168, file_version=0) at libs/ serialization/src/basic_text_oprimitive.cpp:317 #20 0x000540f9 in boost::serialization::access::serialize (ar=@0xbffff168, t=@0xbfffe730, file_version=0) at libs/serialization/src/basic_text_oprimitive.cpp:317 #21 0x00054121 in boost::serialization::serialize (ar=@0xbffff168, t=@0xbfffe730, file_version=0) at libs/serialization/src/basic_text_oprimitive.cpp:317 #22 0x00054165 in boost::serialization::serialize_adl (ar=@0xbffff168, t=@0xbfffe730, file_version=0) at libs/serialization/src/basic_text_oprimitive.cpp:317 #23 0x0005418e in boost ::archive::detail::save_non_pointer_type::save_only::invoke (ar=@0xbffff168, t=@0xbfffe730) at libs/serialization/src/ basic_text_oprimitive.cpp:317 #24 0x000541ae in boost ::archive::detail::save_non_pointer_type::invoke (ar=@0xbffff168, t=@0xbfffe730) at libs/serialization/src/basic_text_oprimitive.cpp:317 #25 0x000541ce in boost::archive::save (ar=@0xbffff168, t=@0xbfffe730) at libs/serialization/src/basic_text_oprimitive.cpp:317 #26 0x000541f8 in boost ::archive ::detail ::common_oarchive < boost ::archive ::xml_oarchive>::save_override (this=0xbffff168, t=@0xbfffe730) at libs/serialization/src/ basic_text_oprimitive.cpp:317 #27 0x00054242 in boost ::archive ::basic_xml_oarchive < boost ::archive ::xml_oarchive>::save_overrideboost::serialization::binary_object (this=0xbffff168, t=@0xbfffe738) at libs/serialization/src/ basic_text_oprimitive.cpp:317 #28 0x0005428e in boost ::archive ::detail::interface_oarchiveboost::archive::xml_oarchive::operator<< boost::serialization::binary_object const> (this=0xbffff168, t=@0xbfffe738) at libs/serialization/src/ basic_text_oprimitive.cpp:317 #29 0x00054301 in MacTierra::Soup::saveboost::archive::xml_oarchive (this=0x500880, ar=@0xbffff168, version=0) at libs/serialization/src/ basic_text_oprimitive.cpp:317 #30 0x0005432b in boost ::serialization::access::member_save (ar=@0xbffff168, t=@0x500880, file_version=0) at libs/serialization/src/basic_text_oprimitive.cpp:317 #31 0x00054353 in boost ::serialization::detail::member_saver::invoke (ar=@0xbffff168, t=@0x500880, file_version=0) at libs/serialization/src/basic_text_oprimitive.cpp:317 #32 0x0005437b in boost::serialization::split_member (ar=@0xbffff168, t=@0x500880, file_version=0) at libs/ serialization/src/basic_text_oprimitive.cpp:317 #33 0x000543a3 in MacTierra::Soup::serializeboost::archive::xml_oarchive (this=0x500880, ar=@0xbffff168, file_version=0) at libs/serialization/ src/basic_text_oprimitive.cpp:317 This is on Mac OS X, using gcc 4.0, compiling for intel. Has anyone seen this crash? Should I reduce and file a bug? Simon