pytorch version: 1.0.0.dev20181010
saving the model :
traced_script_module = torch.jit.trace(net, im_tensor)
traced_script_module.save('model.pt')

and then:
#include <torch/script.h>

#include <iostream>
#include <memory>
int main(int argc, const char* argv[]) {
  if (argc != 2) {
    std::cerr << "usage: example-app <path-to-exported-script-module>\n";
    return -1;
  }
  // Deserialize the ScriptModule from a file using torch::jit::load().
  std::shared_ptr<torch::jit::script::Module> module = torch::jit::load(argv[1]);
  assert(module != nullptr);
  std::cout << "ok\n";
}

and got an error in the terminate when loading the model:
terminate called after throwing an instance of 'std::runtime_error'
  what():  unexpected string for type kind
Aborted (core dumped)

How to fix it?