Boost python segmentation fault on import - c++

Question

I have a class
It's .h file looks like this:
#ifndef MY_CLASS_H
#define MY_CLASS_H
#include <dependence1.h>
#include <dependence2.h>
#include <dependence3.h>
namespace my_class {
union uidData {
uint64_t uidDec;
uint8_t uidRaw[sizeof(uint64_t)];
};
struct someData {
bool boolData;
UidData uidData;
};
struct someData2 {
uint8_t data1;
uint8_t data2;
uint8_t data3;
someData data4;
};
class My_Class {
public:
My_Class(uint8_t param1 = 0, uint8_t param2 = 0, uint8_t param3 = 3,
uint64_t param4 = 0xFFFFFFFFFFFFU);
uint32_t foo1();
uint32_t foo2();
uint64_t foo3();
bool foo4();
uint32_t foo5();
private:
const uint8_t const1;
const uint8_t const2;
const uint8_t const3;
const uint64_t const4;
TYPE1 var1;
someData2 var2;
TYPE2 var3;
};
}
#endif //MY_CLASS_H
my_class_module.cpp :
#include <boost/python.hpp>
#include "my_class.h"
using namespace boost::python;
BOOST_PYTHON_MODULE(my_class)
{
class_<my_class::My_class>("My_class", init<uint8_t, uint8_t, uint8_t, uint64_t>())
.def("foo1", &my_class::My_class::foo1)
.def("foo2", &my_class::My_class::foo2)
.def("foo3", &my_class::My_class::foo3)
.def("foo4", &my_class::My_class::foo4)
.def("foo5", &my_class::My_class::foo5)
;
}
This class works well when I use it in c++. But when I compile it with:
g++ -O2 -L../boost/boost_1_81_0/build/lib -I../boost/boost_1_81_0/build/include -I/usr/include/python3.6 -I./include my_class_module.cpp -fPIC -lboost_python36 -Wl,-soname,my_class -shared -o my_class_module.so
And try to use in python: import my_class_module
it gives Segmentation fault (core dumped)
without any other errors.
This code doesn't do anything until class object created. But it fails right after import.
Where could I make a mistake?