🔥 Ошибка Therac-25: когда код убивает @DevOps

Create: 2025-05-10 Update: 2025-06-29 17:30:25

🔥 Ошибка Therac-25: когда код убивает

▪ В 1980-х Therac-25 считался чудом медицины: новый линейный ускоритель для лечения рака с точной дозировкой радиации. Разработчики гордились: теперь всё управляет программное обеспечение — минимум ручной работы и максимум безопасности… казалось бы.

Но вскоре пациенты начали получать смертельные дозы радиации. Люди приходили на лечение и получали 100-кратное превышение нормы буквально за секунды. Некоторые умирали мгновенно, другие — спустя несколько недель.

Что же случилось? 👇

▪ Гонка потоков (race condition) — незаметный баг в коде. Если техник слишком быстро переключал режимы лечения, программа не успевала правильно активировать защиту. Результат: машина включала мощнейший луч без блокировки и буквально сжигала пациентов.

Разработчики уверяли, что код «идеален» и проблема не в них. Только после нескольких трагедий независимые эксперты нашли источник: баг проявлялся лишь при экстремально быстром вводе комбинаций клавиш — ситуация, которую никто даже не тестировал.

💥 Итог: Therac-25 стал примером того, что даже одна строка кода может убить, если игнорировать тестирование edge-case сценариев. Этот случай навсегда изменил стандарты разработки критически важных систем, введя новые международные нормы безопасности.

👉 Урок:
Никогда не верь, что твой код «без ошибок». Особенно когда от него зависят жизни.

#код #баги #историиИТ #therac25 #разработка #тестирование #fail

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3.8K viewsMay 10 at 12:04

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🔥 Ошибка Therac-25: когда код убивает