OpenCV查找轮廓的示例代码:向量释放问题

我正在尝试在OpenCV 2.4.2中开始轮廓检测。为此，我为OpenCV建立了一个项目，并复制了文档中的整个示例代码。为了将来参考，这里是代码：

#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace cv;
using namespace std;
Mat src; Mat src_gray;
int thresh = 100;
int max_thresh = 255;
RNG rng(12345);
/// Function header
void thresh_callback(int, void* );
/** @function main */
int main( int argc, char** argv )
{
  /// Load source image and convert it to gray
  src = imread( argv[1], 1 );
  /// Convert image to gray and blur it
  cvtColor( src, src_gray, CV_BGR2GRAY );
  blur( src_gray, src_gray, Size(3,3) );
  /// Create Window
  char* source_window = "Source";
  namedWindow( source_window, CV_WINDOW_AUTOSIZE );
  imshow( source_window, src );
  createTrackbar( " Canny thresh:", "Source", &thresh, max_thresh, thresh_callback );
  thresh_callback( 0, 0 );
  waitKey(0);
  return(0);
}
/** @function thresh_callback */
void thresh_callback(int, void* )
{
  Mat canny_output;
  vector<vector<Point> > contours;
  vector<Vec4i> hierarchy;
  /// Detect edges using canny
  Canny( src_gray, canny_output, thresh, thresh*2, 3 );
  /// Find contours
  findContours( canny_output, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, Point(0, 0) );
  /// Draw contours
  Mat drawing = Mat::zeros( canny_output.size(), CV_8UC3 );
  for( int i = 0; i< contours.size(); i++ )
     {
       Scalar color = Scalar( rng.uniform(0, 255), rng.uniform(0,255), rng.uniform(0,255) );
       drawContours( drawing, contours, i, color, 2, 8, hierarchy, 0, Point() );
     }
  /// Show in a window
  namedWindow( "Contours", CV_WINDOW_AUTOSIZE );
  imshow( "Contours", drawing );
  contours.clear(); // Error!!
}

它在Visual Studio 11 RC（Windows 7 SP1）中编译得很好，但在thresh_callback函数的末尾出现了一个错误。这是堆叠竞赛：

msvcr110d.dll!_CrtIsValidHeapPointer(const void * pUserData) Line 2036
msvcr110d.dll!_free_dbg_nolock(void * pUserData, int nBlockUse) Line 1322
msvcr110d.dll!_free_dbg(void * pUserData, int nBlockUse) Line 1265
msvcr110d.dll!operator delete(void * pUserData) Line 54
std::allocator<cv::Point_<int> >::deallocate(cv::Point_<int> * _Ptr, unsigned int __formal) Line 586
std::_Wrap_alloc<std::allocator<cv::Point_<int> > >::deallocate(cv::Point_<int> * _Ptr, unsigned int _Count) Line 888
std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > >::_Tidy() Line 1542
std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > >::~vector<cv::Point_<int>,std::allocator<cv::Point_<int> > >() Line 901
std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > >::`scalar deleting destructor'(unsigned int)
std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > >::destroy<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > >(std::<cv::Point_<int>,std::allocator<cv::Point_<int> > > * _Ptr) Line 624
std::allocator_traits<std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > > >::destroy<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > >(std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > > & _Al, std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > * _Ptr)758
std::_Wrap_alloc<std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > > >::destroy<std::vector<cv::Point_<int>,std::allocator<cv::Poin> > > >(std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > * _Ptr) Line 909
std::_Destroy_range<std::_Wrap_alloc<std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > > > >(std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > * _First, std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > * _Last, std::_Wrap_alloc<std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::<int> > > > > & _Al, std::_Nonscalar_ptr_iterator_tag __formal) Line 89
std::_Destroy_range<std::_Wrap_alloc<std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > > > >(std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > * _First, std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > * _Last, std::_Wrap_alloc<std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::<int> > > > > & _Al) Line 80
std::vector<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > >,std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> >::_Destroy(std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > * _First, std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > * _Last) Line 1480
std::vector<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > >,std::allocator<std::vector<cv::Point_<int>,std::allocator<cv::Point_<int> > > > >::c Line 1416
thresh_callback(int __formal, void * __formal) Line 143
opencv_highgui242d.dll!icvUpdateTrackbar(CvTrackbar * trackbar, int pos) Line 1938
opencv_highgui242d.dll!HGToolbarProc(HWND__ * hwnd, unsigned int uMsg, unsigned int wParam, long lParam) Line 1982

（请注意，实际上我有一个稍微修改过的示例代码版本，添加了一些printf-s，还有一个位于第143行的contours.clear()调用，它触发了向量解除分配[这将在函数末尾自动发生]，这似乎是问题的根源。同样的问题也发生在确切的示例代码中。）

问题似乎与contours向量的释放有关。如果我尝试调用contours.clear()，也会发生同样的情况。我已经在VS调试器中检查了变量的内容，但据我所知，没有什么异常。

我试图在不再需要矢量时（在for循环之后）尽快清除它，但无济于事。我还尝试将平台工具集切换到Visual Studio 10，这反过来甚至不会编译出超出我范围的错误消息：

error C1083: Cannot open include file: 'SDKDDKVer.h': No such file or directory (C:<project path>targetver.h) (Line 8, Column 1)
IntelliSense: cannot open source file "SDKDDKVer.h" (C:<project path>targetver.h) (Line 8, Column 1)
IntelliSense: cannot open source file "windows.h" (C:<opencv path>buildincludeopencv2coreoperations.hpp (Line 83, Column 3)

如有任何帮助，我们将不胜感激。请注意，我不是C++程序员：我对C++编程和本机编程的知识很少，经验也更少。

编辑：原来调试器显示了错误的行作为错误源。我应该在调用堆栈中看到问题出在vector>上。所以有问题的向量是contours，而不是hierarchy！

编辑#2：我还试图用一个最小的代码来重现这个问题，该代码创建一个vector<vector<cv::Point> >，在其中放入一些项目，然后清除它，但我无法重现这个问题。