People also seem to be ignorant of the fact that this is from John Regehr, author of CSmith. He probably knows the C standard and C compiler behavior as well as

People also seem to be ignorant of the fact that this is from John Regehr, author of CSmith. He probably knows the C standard and C compiler behavior as well as the primary C compiler developers. He's well aware of the issues of backwards compatibility but is ignoring them for the purposes of this post.