void CairoOutputDev::doPath(cairo_t *cairo, GfxState *state, GfxPath *path) {
  GfxSubpath *subpath;
  int i, j;
  for (i = 0; i < path->getNumSubpaths(); ++i) {
    subpath = path->getSubpath(i);
    if (subpath->getNumPoints() > 0) {
      cairo_move_to (cairo, subpath->getX(0), subpath->getY(0));
         j = 1;
      while (j < subpath->getNumPoints()) {
	if (subpath->getCurve(j)) {
	  cairo_curve_to( cairo,
			  subpath->getX(j), subpath->getY(j),
			  subpath->getX(j+1), subpath->getY(j+1),
			  subpath->getX(j+2), subpath->getY(j+2));

	  j += 3;
	} else {
	  cairo_line_to (cairo, subpath->getX(j), subpath->getY(j));
	  ++j;
	}
      }
      if (subpath->isClosed()) {
	LOG (printf ("close\n"));
	cairo_close_path (cairo);
      }
    }
  }
}

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