Are you referring to setjmp? Because it&#x27;s quite the opposite. This blog article does a good job explaining: <a href="http:&#x2F;&#x2F;latentcontent.net&#x2F;2007&#x2F;12&#x2F;05&#x2F;libpng-worst-api-ever&#x2F;" rel="nofollow">http:&#x2F;&#x2F;latentcontent.net&#x2F;2007&#x2F;12&#x2F;05&#x2F;libpng-worst-api-ever&#x2F;</a>