I had recently run into an embedded problem where when switching the order of two functions in the source code, one of them would refuse to work. I tried a number of things without identifying the real error, and finally had to add a comment warning any later parties not to do this.
I even checked the assembly and they seem to be consistent. But when I upload to firmware, the error keeps coming back over and over again.
This is a fascinating article with a good detective story, and juicy details, but the images are very distracting.
They auto-scale to the correct aspect ratio to fill most of the width of the screen. On a mobile phone, sure, that's fine. On a widescreen monitor on a desktop computer, they are monstrously huge and don't fit on the screen.
In the CSS, rustdoc.css has img{max-width: 100%;}, but it also has .content,nav{max-width: 960px;} which is what's contraining the width of the article's text. The images look a lot better on widescreen with img{max-width: 960px;} to match... but then they don't scale correctly on the mobile layout.
There are a number of edge cases in embedded where static variables can become unreliable. I am not saying it is common exactly but it is certainly not unheard of. I usually keep it in my list of things to check when stuff is mysteriously going wrong
