opencv split hsv images

I want to split an image into h,s and v channels. But an error occured every time and the reason seems to be that opencv split function does not work properly.

My code:

Mat src, srcHSV;
Mat srcH;
vector<Mat> channels;
VideoCapture cap(0);
for(int frame = 0; ; frame++)
{
    cap >> src;

    imshow("camera image", src)；
    cvWaitKey(1);

    cvtColor(src, srcHSV, CV_BGR2HSV);
    imshow("hsv image", srcHSV);
    cvWaitKey(1);

    split(srcHSV, channels);
    srcH =  channels[0];
    ...  //do something with srcH
}

Camera image and hsv image are OK. But when it executes srcH = channels[0], an error message says:

Unhandled exception at 0x012d1602 in xxx.exe: 0xC0000005: Access violation reading location 0x00000014.

I set a breakpoint here and checked the value of channels. It comprises of many elements, but each element is an unknown object.
I saw a post talking about the similar problem but there was no answer. split image to 3 channels opencv error.

[solved]
According to @nowaqq 's comments and @Andrey Smorodov 's answer, my code now looks like this:

for(int frame =0 ; ; frame ++)
  {
    vector<Mat> channels; //put the channels declaration inside the for-loop

    cap >> src;

    imshow("camera image", src);
    cvWaitKey(1);
    srcHSV = Mat::zeros(Size(src.rows, src.cols), CV_8UC3);
    cvtColor(src, srcHSV, CV_BGR2HSV);
    imshow("hsv image", srcHSV);
    cvWaitKey(1);

    channels.clear();
    channels.resize(srcHSV.channels());  //resize channels
    cv::split(srcHSV, &channels[0]);  //&channels[0] instead of channels as the second parameter to split function
    srcH = channels[0];
    ...//do something with srcH
 }

[updated]
I struggled to solve another problem, this problem was also solved as a side-effect. See my answer below.

Put channels declaration into loop, split seems pushes more and more Mat into vector, and these Mats are become broken next iteration. Or clean it each time, before use split.