Really? The only time you need to know that removing that line will cause a segfault is if you are going to remove that line; but, if you're going to remove the line, you're surely going to check the comment above it, even if the comment doesn't jump out at you. Even an important comment is still irrelevant except when you are looking for clarification about the code it comments on; so I don't think it ever makes sense for comments to be emphasized more than the code.