StacktraceTop: size (this=<optimized out>) at /usr/include/c++/4.6/bits/basic_string.h:711 compare (__str=<optimized out>, this=<optimized out>) at /usr/include/c++/4.6/bits/basic_string.h:2175 operator< <char, std::char_traits<char>, std::allocator<char> > (__rhs=<optimized out>, __lhs=<optimized out>) at /usr/include/c++/4.6/bits/basic_string.h:2512 operator() (__y=<optimized out>, __x=<optimized out>, this=<optimized out>) at /usr/include/c++/4.6/bits/stl_function.h:236 _M_lower_bound (__y=<optimized out>, __k=<optimized out>, __x=<optimized out>, this=<optimized out>) at /usr/include/c++/4.6/bits/stl_tree.h:1080
StacktraceTop: c++/4.6/ bits/basic_ string. h:711 c++/4.6/ bits/basic_ string. h:2175 traits< char>, std::allocator< char> > (__rhs=<optimized out>, __lhs=<optimized out>) at /usr/include/ c++/4.6/ bits/basic_ string. h:2512 c++/4.6/ bits/stl_ function. h:236 c++/4.6/ bits/stl_ tree.h: 1080
size (this=<optimized out>) at /usr/include/
compare (__str=<optimized out>, this=<optimized out>) at /usr/include/
operator< <char, std::char_
operator() (__y=<optimized out>, __x=<optimized out>, this=<optimized out>) at /usr/include/
_M_lower_bound (__y=<optimized out>, __k=<optimized out>, __x=<optimized out>, this=<optimized out>) at /usr/include/