Sounds familiar

Rico says this is from Hacker Crackdown by Bruce Sterling, which is about hackers who took down the phone system in 1990, but it sounds like the current Heartbeat problem:

Computers, despite years of effort in "artificial intelligence", have proven spectacularly bad in "catching the gist" of anything at all. The tiniest bit of semantic grit may still bring the mightiest computer tumbling down. One of the most hazardous things you can do to a computer program is try to improve it, to try to make it safer. Software "patches" represent new, untried unstable software, which is, by definition, riskier.