Me, two weeks ago: "I've written this one universal buffer implementation to replace the 5 ad-hoc buffer implementations, because if anything goes wrong it's really hard to debug those"

Also me: "Hmm I've been debugging this weird issue for an hour now, I can't seem to figure out where it's coming from, oh wait it's in one of the ad-hoc buffer implementations that I hadn't gotten around to replacing with the new one yet"