Runtime(TiArch arch, TiRuntime runtime, bool should_destroy) should terminate the program when providing improper arch parameter

[YuCrazing]

Describe the bug
When I provide a improper value of arch (for example arch=12) into Runtime(TiArch arch, TiRuntime runtime, bool should_destroy), taichi does not report any errors.

Expected behaviour
I hope taichi could report a fatal error and shut down the program in this situation, because an improper arch could affect the following execution of the program (for example, it could be fatal if Runtim::arch() returns a wrong result).

[jim19930609]

It actually reports:

#include <cmath>
#include <iostream>
#include <numeric>
#include <taichi/cpp/taichi.hpp>

struct App0_tutorial {

  ti::Runtime runtime_;

  App0_tutorial() {
    runtime_ = ti::Runtime(TiArch(16));
  }

  void run() {
  }
};

int main(int argc, const char** argv) {
  App0_tutorial app;
  app.run();
  return 0;
}