Pybind11 repro

test.cpp

#include <pybind11/pybind11.h>
#include <pybind11/stl.h>

namespace py = pybind11;


class MyClass {
private:
    int value;
public:
    MyClass() : value(0) {}
    MyClass(int val) : value(val) {}
    int getValue() const { return value; }
};


namespace pybind11 { namespace detail {
    template <> struct type_caster<MyClass> : type_caster_base<MyClass> {
        using base = type_caster_base<MyClass>;
    public:
        PYBIND11_TYPE_CASTER(MyClass, _("MyClass"));

        bool load(handle src, bool convert) {
            return base::load(src, convert);
        }

        static handle cast(MyClass src, return_value_policy policy, handle parent) {
            return base::cast(src, policy, parent);
        }
    };
}}


PYBIND11_MODULE(pygold, m) {
    py::class_<MyClass>(m, "MyClass")
        .def(py::init<>())
        .def(py::init<int>())
        .def("__repr__",
             [](const MyClass& obj) {
                 return "MyClass(" + std::to_string(obj.getValue()) + ")";
             })
        ;
}