https://web.cs.ucdavis.edu/~filkov/papers/lang_github.pdf A Large Scale Study of Programming Languages and Code Quality in Github tl;dr: крестосишка, как нетрудно было догадаться, - лидер багодрома; The languages Clojure, Haskell, Ruby, Scala, and TypeScript, all have negative coefficients implying that these languages are less likely than the average to result in defect fixing commits.