Andy, I see guild (guile compiler) freezing with latest libgc. Reverting to 7.2d-2 solved the issue https://cygwin.com/ml/cygwin/2017-06/msg00191.html Can you check for any difference between 7.6.0-1 and 7.2d-2 ? Regards Marco -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple