gcc set_terminate, C++ (gcc)

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//Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23506 for x64

#include <thread>
#include <iostream>
#include <map>

void handler1() {
  std::cout << " handler1 "<<std::endl;
}
void handler2() {
  std::cout << " handler2 "<<std::endl;
}
void handler3() {
  std::cout << " handler3 "<<std::endl;
}

int main() {
  std::map<size_t,int> handlerNames;
  handlerNames[(size_t)std::get_terminate()]=0;
  handlerNames[(size_t)handler1]=1;
  handlerNames[(size_t)handler2]=2;
  handlerNames[(size_t)handler3]=3;
    
  using namespace std::chrono_literals;
  std::cout << "handler at th0 is :" << handlerNames.at((size_t)std::get_terminate()) << std::endl;
  std::set_terminate(handler1);
  std::cout << "handler at th0 is :" << handlerNames.at((size_t)std::get_terminate()) << std::endl;
  auto t1 = std::thread([&handlerNames]()
  {
    std::cout << "handler at th1 is :" << handlerNames.at((size_t)std::get_terminate()) << std::endl;
    std::cout << "t1 started"<<std::endl;
    std::this_thread::sleep_for(2s);
    std::cout << "t2 continued"<<std::endl;
    std::cout << "handler at th1 is :" << handlerNames.at((size_t)std::get_terminate()) << std::endl;
    std::terminate();
  });
  std::this_thread::sleep_for(1s);
  std::set_terminate(handler2);
  std::cout << "handler at th0 is :" << handlerNames.at((size_t)std::get_terminate()) << std::endl;
  std::cout << "waiting "<<std::endl;
  t1.join();
  std::cout << "done "<<std::endl;
}

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Compilation time: 1.04 sec, absolute running time: 2.11 sec, cpu time: 0.77 sec, memory peak: 3 Mb, absolute service time: 3,21 sec