Is that because you update your rustc every month or two by either, 1. using a rolling distro, or 2. pulling down a new one from out of repo sources using rustup... | sh, etc as is standard rust community practice? Or did you really use a normal non-rolling distro's packaged rustc and never run into problems in 5 years?

If the former, well... yeah. If the later, I'm impressed. I wasn't doing anything complex. I had it happen even with simple programs like a rust web scraper tool for web serials to epub and a rust FFT visualizer for software defined radio.