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Probably not what you mean, but this (https://news.ycombinator.com/item?id=12853211) submission about the PVS-Studio static analyzer also shows a bunch of copy+paste errors being found.

Interesting.

How would you minimize these type of errors by design or best practice?

I guess languages with a lack of higher order abstractions and no strong type system might be more prone to this type of errors.

This isn't a subtle or difficult-to-find case. It's a case of "why the heck would anyone write code like that, in any language, in the first place?" The only language-level abstraction needed to avoid this particular kind of duplicated code, is a loop.

I want to know..

I went looking for this again today. It's not the article I was talking about, but you might find this interesting:

http://pages.cs.wisc.edu/~shanlu/paper/TSE-CPMiner.pdf