GfxSubpath::GfxSubpath(GfxSubpath *subpath) {
  size = subpath->size;
  n = subpath->n;
  x = (double *)gmallocn(size, sizeof(double));
  y = (double *)gmallocn(size, sizeof(double));
  curve = (GBool *)gmallocn(size, sizeof(GBool));
  memcpy(x, subpath->x, n * sizeof(double));
  memcpy(y, subpath->y, n * sizeof(double));
  memcpy(curve, subpath->curve, n * sizeof(GBool));
  closed = subpath->closed;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.