The author admits to not being a C undefined behavior expert and yet acts like they might know better than a tool made by such experts.

Looking up the rules and verifying the shown snippets takes at most 30 minutes at a leisurely pace, the author could have saved themselves the embarrassment.

I'm not going to write a blog post about how I didn't expect a color spectrometer pointed at the sky to say "BLUE" because I thought it might have been purple, "although I'm not an expert in wave lengths".