(gdb) bt
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb7a5da8b in write () from /lib/tls/libc.so.6
#2  0xb7a0187f in _IO_file_write () from /lib/tls/libc.so.6
#3  0xb7a002a5 in _IO_file_setbuf () from /lib/tls/libc.so.6
#4  0xb7a01a81 in _IO_file_xsputn () from /lib/tls/libc.so.6
#5  0xb79f7562 in fwrite () from /lib/tls/libc.so.6
#6  0xb7b7c497 in std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> > >::do_put ()
   from /usr/lib/libstdc++.so.6
#7  0xb7b7cc58 in std::operator<< <char, std::char_traits<char>, std::allocator<char> > ()
   from /usr/lib/libstdc++.so.6
#8  0x0804de6c in Action::out (this=0x488f34, os=@0x8101870) at include/action.cpp:158
#9  0x0804e034 in operator<< (os=@0x8101870, a=@0x488f34) at include/action.cpp:334
#10 0x080acc82 in Network::ReceiveActions (this=0x8103120) at network/network.cpp:278
#11 0x080ace00 in net_thread_func (no_param=0x0) at network/network.cpp:53
#12 0xb7ea90ed in SDL_RunThread () from /usr/lib/libSDL-1.2.so.0
#13 0x00000000 in ?? ()
(gdb)