flat_map over small_vector: MSVC compilation failure, but compiles fine in Clang and GCC

[vldt]

The following code does not compile in MSVC 19.22 but compiles fine in Clang and/or GCC.

Godbolt here: https://godbolt.org/z/QxQ6T5

#include <boost/container/small_vector.hpp>
#include <boost/container/flat_map.hpp>

struct point
{
    double x,y,z;
};

using pair_t = std::pair<int, point>;

struct Data
{
    // Note: MSVC workaround commented out
    using vector_t = boost::container::small_vector<std::pair<int, point>, 64 /*, boost::container::new_allocator<std::pair<int, point>>*/>;
    using track_t = boost::container::flat_map<int, point, std::less<int>,vector_t>; 

    track_t track{};
};

int main()
{
   Data d;
}

In MSVC, as a workaround, we have to explicitly specify the allocator for small_vector: https://godbolt.org/z/VvU4j2

[igaztanaga]

I can't reproduce the bug with Boost 1.74. AFAIK it's still a compilation error in Goldbolt because it does not allow selecting the boost version for MSVC (but the VCPKG is version 202004 and it seems that boost 1.74 is still a work in progress in vcpkg (https://github.com/microsoft/vcpkg/issues/13033).