[Bug c++/69017] [cilkplus] ICE with valid cilk_spawn

[ryan.burn at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69017

--- Comment #1 from ryan.burn at gmail dot com ---
Better example:
struct B {                                                                      
};                                                                              

B f() { return {}; }                                                            

void g() {                                                                      
  B b;                                                                          
  b = _Cilk_spawn f();                                                          
}                                                                               

int main() {                                                                    
  g();                                                                          
  return 0;                                                                     
}