#0  0x264666d1 in kill () from /lib/libc.so.6
#1  0x26466455 in raise () from /lib/libc.so.6
#2  0x26467a5c in abort () from /lib/libc.so.6
#3  0x0804ddce in ?? ()
#4  <signal handler called>
#5  0x264ae7e2 in mallopt () from /lib/libc.so.6
#6  0x264ad5cd in free () from /lib/libc.so.6
#7  0x263e8ce3 in operator delete(void*) () from /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.3/libstdc++.so.5
#8  0x263e8d3f in operator delete[](void*) () from /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.3/libstdc++.so.5
#9  0x0806ee95 in std::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) ()
#10 0x08051efa in std::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) ()
#11 0x0808f693 in std::basic_string<char, std::char_traits<char>, std::allocator<char> > std::operator+<char, std::char_traits<char>, std::allocator<char> >(char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) ()
#12 0x0804cb49 in ?? ()
#13 0x08094f12 in std::string::string<__gnu_cxx::__normal_iterator<char const*, std::string> >(__gnu_cxx::__normal_iterator<char const*, std::string>, __gnu_cxx::__normal_iterator<char const*, std::string>, std::allocator<char> const&) ()
#14 0x26452cc1 in __libc_start_main () from /lib/libc.so.6
#15 0x0804b761 in ?? ()