module main;
//const S S1 = S(); // uncomment this to compile
struct S
{
  float value;
  static S opCall()
  {
    S s;
    return s;
  }
  const S S2 = S();
}
void main(){}
--
main.d(4): Error: struct main.S no size yet for forward reference
main.d(4): Error: struct main.S no size yet for forward reference
main.d(11): Error: cannot evaluate opCall() at compile time