Same thing in say the Linux kernel, where gcc removing a NULL pointer check actually created a vulnerability: <a href="http:&#x2F;&#x2F;lwn.net&#x2F;Articles&#x2F;342330&#x2F;" rel="nofollow">http:&#x2F;&#x2F;lwn.net&#x2F;Articles&#x2F;342330&#x2F;</a>