this(T...) not called in struct constructor

[Timothee Cour]

This may have been discussed before, but I'm not sure whether this is a bug
or not. In any case it's a bit confusing.

struct Foo2{
  this(T...)(T args){
    assert(0);
  }
}

void main(){
  auto a2=Foo2();//doesn't call assert(0) (ie this(T...) not called)
}