[Boost-users] [asio]crash when acess boost::system::error_code err.message()

Subject: [Boost-users] [asio]crash when acess boost::system::error_code err.message()
From: victor (victor.boost.program_at_[hidden])
Date: 2010-01-13 01:44:24

hello,
       I use boost1.40.0 on linux2.6/gcc4.1.2.

      when my process execute code as flow, my process crash.:
void CSapConnection::HandleWrite(const boost::system::error_code& err)
{
        std::cout<<"error:" <<err.message()<<"\n";
}
This coredump information:

Program terminated with signal 11, Segmentation fault.
#0  0x080c7c83 in boost::system::error_code::message (this=0xb6bf0f64) at
/usr/local/boost_1_40_0/boost/system/error_code.hpp:347
347           std::string             message() const  { return
m_cat->message(value()); }
(gdb) p this
$1 = (const boost::system::error_code * const) 0xb6bf0f64
(gdb) p *this
$2 = {m_val = 136236300, m_cat = 0xd56658}
(gdb) p *m_cat
$3 = {<boost::noncopyable_::noncopyable> = {<No data fields>},
_vptr.error_category = 0x0}

Is this a bug of asio??