Product of references in different scope isn't handled correctly in reverse mode

[ovdiiuv]

double fn(double x, double y){
  double g = 0;
  {
  double &j = x;
  g += j*j;
  }
  return g;
}

generates:

void fn_grad(double x, double y, double *_d_x, double *_d_y) {
    double _d_r = 0;
    double _d_g = 0;
    double *_d_j = 0;
    double *j = {};
    double _t0;
    double r = x;
    double g = 0;
    {
        _d_j = &_d_r;
        j = &r;
        _t0 = g;
        g += *j * j;
    }
    _d_g += 1;
    {
        {
            g = _t0;
            double _r_d0 = _d_g;
            *_d_j += _r_d0 * j;
            *_d_j += *j * _r_d0;
        }
    }
    *_d_x += _d_r;
} 

Input: x=1, y=1
Expected output: dx = 2, dy=0
Output: dx = 1, dy=0