C++ code is fraught with perils and pitfalls. That's why a thorough and meticulous code review is very important. The purpose of this talk is to (hopefully) improve your ability to take on such a task. We'll take a look at some error patterns easily overlooked. In all honesty, many people just don't know about them. Meet a dangerous emplace_back, an unexpected integer overflow, a skipped memset, perils of noexcept functions, and so on.