--- title: "Cfir Aguston (@Cfiraguston) | Hashnode" description: "Experienced software engineering manager passionate about embedded systems, tech history and software education." url: "https://hashnode.com/@Cfiraguston" --- @Cfiraguston # Cfir Aguston @Cfiraguston · Joined October 2025 [Website](https://medium.com/@cfiraguston) ### [When Floating-Point Failed Catastrophically](https://cfiraguston.hashnode.dev/when-floating-point-failed-catastrophically?utm_source=hashnode&utm_medium=feed) Discover how tiny floating-point errors caused major failures, from the Pentium FDIV bug to Ariane 5, Patriot missiles, and the stock market. 2 min read · [cfiraguston.hashnode.dev](https://cfiraguston.hashnode.dev/when-floating-point-failed-catastrophically?utm_source=hashnode&utm_medium=feed) [Oct 14, 2025](https://hashnode.com/posts/when-floating-point-failed-catastrophically/68edfd2a10b5a78becfe8dc2) ### [Oops I goto It Again](https://cfiraguston.hashnode.dev/oops-i-goto-it-again?utm_source=hashnode&utm_medium=feed) A single line of code, goto fail;, broke Apple’s SSL security in 2014. Discover how one small mistake exposed millions of devices to attack. 1 min read · [cfiraguston.hashnode.dev](https://cfiraguston.hashnode.dev/oops-i-goto-it-again?utm_source=hashnode&utm_medium=feed) [Oct 14, 2025](https://hashnode.com/posts/oops-i-goto-it-again/68edfd126eb642f50460149f) ### [The Car That Would Not Stop](https://cfiraguston.hashnode.dev/the-car-that-would-not-stop?utm_source=hashnode&utm_medium=feed) A deadly Toyota crash revealed a hidden software bug that made cars accelerate uncontrollably. Discover how coding errors changed automotive safety. 1 min read · [cfiraguston.hashnode.dev](https://cfiraguston.hashnode.dev/the-car-that-would-not-stop?utm_source=hashnode&utm_medium=feed) [Oct 14, 2025](https://hashnode.com/posts/the-car-that-would-not-stop/68edfcf718049921d180b9d6) ### [The Forbidden Intel Opcode That Melts CPUs](https://cfiraguston.hashnode.dev/the-forbidden-intel-opcode-that-melts-cpus?utm_source=hashnode&utm_medium=feed) A single forbidden opcode once froze Intel CPUs worldwide. Learn the story behind the F00F bug and how it reshaped hardware design. 1 min read · [cfiraguston.hashnode.dev](https://cfiraguston.hashnode.dev/the-forbidden-intel-opcode-that-melts-cpus?utm_source=hashnode&utm_medium=feed) [Oct 14, 2025](https://hashnode.com/posts/the-forbidden-intel-opcode-that-melts-cpus/68edfc89db3233ea758b64df) ### [Statement Coverage Is Not Enough](https://cfiraguston.hashnode.dev/statement-coverage-is-not-enough?utm_source=hashnode&utm_medium=feed) Testing is not about numbers, it is about confidence in behavior 2 min read · [cfiraguston.hashnode.dev](https://cfiraguston.hashnode.dev/statement-coverage-is-not-enough?utm_source=hashnode&utm_medium=feed) [Oct 10, 2025](https://hashnode.com/posts/statement-coverage-is-not-enough/68e96913156715967783cc40)