c++11 Async seg fault

Question

I'm just trying a few of the new C++11 features with GCC 4.7.2, though when I go to run a seg fault occurs.

$ ./a.out
Message from main.
terminate called after throwing an instance of 'std::system_error'
  what():  Unknown error -1
Aborted (core dumped)

I compiled with the 'beta' features of GCC, in regards to c++0x with:

g++ -std=c++11 c11.cpp

The code:

#include <future>
#include <iostream>

void called_from_async() {
  std::cout << "Async call" << std::endl;
}

int main() {
  //called_from_async launched in a separate thread if possible
  std::future<void> result( std::async(called_from_async));

  std::cout << "Message from main." << std::endl;

  //ensure that called_from_async is launched synchronously 
  //if it wasn't already launched
  result.get();

  return 0;
}