Using unqualified swap() on two small_vectors calls an incorrect swap function

[geza-herman]

This program crashes for me (boost 1.90), during the destructor of small_vector:

#include <boost/container/small_vector.hpp>

int main() {
    boost::container::small_vector<int, 2> a{1, 11};
    boost::container::small_vector<int, 2> b{2, 22};

    swap(a, b);
}

Supposedly the problem is that swap calls boost::container::vector::swap (hidden friend), instead of a small_vector member function.

(Note: a.swap(b) works correctly)