Hi, I think I've got a good clue: the problem is jump_buf alignment (must be multiple of 16). https://github.com/OpenSmalltalk/opensmalltalk-vm/issues/119 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.squeakfoundation.org/pipermail/vm-dev/attachments/20170221/f12dcc4e/attachment.html>