<pre><code class="cpp">
Mat bwin;
Mat dst;
Mat in = imread(inputimage);
cvtColor(in, bwin, CV_RGB2GRAY);
dst=Mat::eye(in.rows, in.cols, CV_8U);
//bwin.copyTo(dst);
threshold(bwin, dst, 50.0, 1.0, THRESH_BINARY);
</code></pre>
This opencv code runs fine in opencv 2.1, but produces following error in opencv 2.3:

Illegal instruction

compiled on linux-x64 using g++