boost::polygon 的分段错误

I have got polygon-data which I processed. Now I want to see how well my processed data fits my original data. For this task I want to use BOOST's polygon set-operators. The following code gives me a segfault though:

#include <iostream>
#include <boost/polygon/polygon.hpp>

using namespace boost::polygon::operators;
using namespace std;

typedef boost::polygon::polygon_data<double> BPolygon;
typedef boost::polygon::polygon_traits<BPolygon>::point_type BPoint;
typedef boost::polygon::polygon_set_data<double> BPolygonSet;
typedef std::vector<BPolygon> BPolygonVec;


double meassureError(BPolygonVec &polys1, BPolygonVec &polys2)
{
  BPolygonSet set1;
  BPolygonSet set2;

  assign(set1, polys1);
  assign(set2, polys2);

  return area(set1 ^ set2);
}

int main(int argc, char *argv[])
{
  BPolygonVec polys1;
  BPolygonVec polys2;

  loadPolysFromFile(polys1);
  loadPolysFromFile(polys2);

  cout << meassureError(polys1, polys2) << endl;
  return 0;
}

gdb 输出:

Program received signal SIGSEGV, Segmentation fault.
0x08156ce7 in std::list<boost::polygon::point_data<double>, std::allocator<boost::polygon::point_data<double> > >::begin (this=0x0) at /usr/include/c++/4.8.2/bits/stl_list.h:759
759           { return iterator(this->_M_impl._M_node._M_next); }

我的数据由大约 2000 个多边形组成，每个多边形大约有 10 个顶点，我希望有足够的内存来处理它.我究竟做错了什么?感谢您的帮助！