The following inpainting demo works if thickness of drawing line is 1 and crashes when it is 2 or more. Version: 2.2 on [[MinGW]]

<pre><code class="cpp">
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include <iostream>
using namespace cv;
using namespace std;

Mat img, inpaintMask;
Point prevPt(-1,-1);

void onMouse( int event, int x, int y, int flags, void* )
{
if( event == CV_EVENT_LBUTTONUP || !(flags & CV_EVENT_FLAG_LBUTTON) )
prevPt = Point(-1,-1);
else if( event == CV_EVENT_LBUTTONDOWN )
prevPt = Point(x,y);
else if( event == CV_EVENT_MOUSEMOVE && (flags & CV_EVENT_FLAG_LBUTTON) )
{
Point pt(x,y);
if( prevPt.x < 0 ) prevPt = pt;
line( inpaintMask, prevPt, pt, Scalar::all(255), 1, 8, 0 );
// line( inpaintMask, prevPt, pt, Scalar::all(255), 2, 8, 0 ); // crashes
line( img, prevPt, pt, Scalar::all(255), 1, 8, 0 );
// line( img, prevPt, pt, Scalar::all(255), 2, 8, 0 ); // crashes
prevPt = pt;
imshow("image", img);
}
}

int main( int argc, char** argv )
{
char* filename = argc >= 2 ? argvr1 : (char*)"fruits.jpg";
Mat img0 = imread(filename, -1);
if(img0.empty())
{
cout << "Couldn't open the image " << filename << ". Usage: inpaint <image_name>\n" << endl;
return 0;
}

namedWindow( "image", 1 );

img = img0.clone();
inpaintMask = Mat::zeros(img.size(), CV_8U);

imshow("image", img);
setMouseCallback( "image", onMouse, 0 );

for(;;)
{
char c = (char)waitKey();

if( c == 27 )
break;

if( c == 'r' )
{
inpaintMask = Scalar::all(0);
img0.copyTo(img);
imshow("image", img);
}

if( c == 'i' || c == ' ' )
{
Mat inpainted;
inpaint(img, inpaintMask, inpainted, 3, CV_INPAINT_TELEA);
imshow("inpainted image", inpainted);
}
}

return 0;
}
</code></pre>