Strange C++ errors

If you have a code:
std::vector vec;
vec.push_bacnk(3); // push_bacnk is not a member of type vector

and you compile it you get an error:

main.cc: In function ‘int main(int, char**)’:
main.cc:311: error: ‘class std::vector, std::allocator >, std::allocator, std::allocator > > >’ has no member named ‘push_bacnk'

I have to say that this one was easy to track down. :)
What's all about std::shar_trails, std::basic_string, .... ?!?