#0  0xb7dc12a5 in std::_Rb_tree_increment () from /usr/lib/libstdc++.so.6
#1  0xb7dc12dd in std::_Rb_tree_increment () from /usr/lib/libstdc++.so.6
#2  0x080aa0ac in ?? ()
#3  0x080a92e2 in ?? ()
#4  0x08097aaf in ?? ()
#5  0x0809822f in ?? ()
#6  0x08098331 in ?? ()
#7  0x0805ec4c in ?? ()
#8  0xb7c0aebc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#9  0x0804ef41 in ?? ()