Function fault_handler

main.cpp:63–78

#ifndef _WIN32

void fault_handler(int sig) {
  void *array[30];
  size_t size;

  // get void*'s for all entries on the stack
  size = backtrace(array, 30);

  // print out all the frames to stderr
  fprintf(stderr, "Error: signal %d:\n", sig);
  backtrace_symbols_fd(array, size, 2);  
  if (w!=NULL) {
      fprintf(stderr, "Forcing save\n");
      w->saveState();
  }
  exit(1);
}