Index: include/opencv/cxmat.hpp
===================================================================
--- include/opencv/cxmat.hpp	(revision 2588)
+++ include/opencv/cxmat.hpp	(working copy)
@@ -3376,8 +3376,11 @@
         Point pt = pos();
         int cols = m->cols;
         ofs += pt.y*cols + pt.x;
-        if( ofs > cols*m->rows )
-            ofs = cols*m->rows;
+        if( ofs > cols*m->rows ) // end of matrix
+        {
+            ptr = sliceEnd = (_Tp*)(m->data + m->step*(m->rows-1)) + cols;
+            return *this;
+        }
         else if( ofs < 0 )
             ofs = 0;
         pt.y = ofs/cols;