gcc/testsuite/g++.dg/init/empty3.C

// PR c++/97597

struct pq {
  pq (const pq &);
};

struct a9 {
  operator pq () const;
};

struct zp : pq {
  zp (const a9 &k3) : pq (k3) { }
};

int main()
{
  zp z = a9();
}