#PPOD: JWST has now captured images of all four gas giants in our solar system: Jupiter, Saturn, Uranus, and Neptune. These images are the first of their kind, and they offer a new and unprecedented view of these distant worlds.

The JWST's image of Jupiter is particularly stunning. The telescope's infrared vision allows us to see through Jupiter's thick clouds, revealing the planet's swirling atmosphere and its Great Red Spot. The planet's haze and auroras steal the show.

#space #science

My experience is that you have to talk to different people about undefined behavior differently.

Some people have drunk deeply from the well of symbolic logic. Once you say "this is stuff the compiler ASSUMES won't happen", they're like "omg then if it did happen, you have a contradiction, and then anything follows! nasal demons! cats and dogs living together!" and never write a C program again.

Some people are like "that's stupid, the compiler turns each line of C into a few assembly instructions, it's not rocket science. I know what's going to happen." To these people, you have to explain what an optimizing compiler is. Sometimes you take the trouble to convince them, and then while you're not looking they become unconvinced again. It's a process.

But I think most people are in between. They just kind of narrow their eyes and are like "I don't think nasal demons are actually a thing, level with me, what really happens?" You know, reasonable, pragmatic human beings.

So in Programming Rust, we talk about where most security bugs come from, and every once in a while we show weird things that can happen, using real code.

I said all that so I could say this: The code in our book is almost all under test. Tests run on every push. So we trigger undefined behavior regularly on this project. Ironic, I know. To my knowledge this hasn't caused anything unusual to come out of my nose, but I guess technically they could appear anywhere. If you see any nasal demons running around... could be us. Sorry.

Look I know I’m a radical left-wing socialist from Berkeley but THE GOVERNMENT MUST NOT HOLD EQUITY STAKES IN ITS SUPPLIERS! It’s impossible to make an unbiased decision in awarding contracts or purchasing goods when the government stands to benefit from a rise in the stock price. This is deeply unfair to small businesses.

Also it’s actual socialism. The state owns the means of production.

https://www.cnbc.com/2025/08/26/trump-pentagon-equity-stakes-in-defense-contractors.html