Furthermore, point 4 in the article (fixing unimportant warnings can cause bugs elsewhere) is real. I mean, it indicates issues with test coverage, but who does

Furthermore, point 4 in the article (fixing unimportant warnings can cause bugs elsewhere) is real. I mean, it indicates issues with test coverage, but who doesn’t have issues with test coverage? Oh, 100% unit test coverage? Is that branch coverage or MC/DC coverage? But anyway, on one team, when making warning fixes we would compare the final binary to show that with our compiler (the one that matters) our change produced identical output to the previous commit. If there actually was a bug that the warning found, well that was a whole different procedure.