xt::real(...) crashes the program when printed to cout

[IcyChlorine]

Behaviour

When I try to print the real(or imag) part of a complex xarray to cout, it crashes and prints nothing:

#include <iostream>
#include <complex>
using namespace std;

#include "xtensor/xarray.hpp"
#include "xtensor/xcomplex.hpp"
#include "xtensor/xio.hpp"

typedef std::complex<double> cpx;

int main()
{
    // bug present only with xarray; everything's fine for xtensor
    xt::xarray<std::complex<double>> U = {
        {cpx(1, 2), cpx(3, 4)},
        {cpx(5, 6), cpx(7, 8)}
    };
    cout << "hello" << endl; // not printed either
    cout << xt::real(U) << endl; // nothing is printed

    return 0;
}

After compiling and run on my computer, nothing is printed, not even the first line, indicating that cout<<xt::real(U)<<endl has crashed the whole program silently.

This bug only happens for xarray; when I replace xarray with xtensor, it works.

Environment

My dev environment is Windows, mingw-w64 8.1.0, running on a Intel i7 CPU.

[spectre-ns]

I get the following output on MSVC 2022

hello
{{ 1.,  3.},
 { 5.,  7.}}